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ULA Atlas V AEHF-6 Launch from Cape Canaveral - 26 March 2020

Jun 06, 2021
let's try it and hope that the flow of light is not interrupted today and see what we are really sending oh, that's me, that's me. Now I'm on camera. That's great, something is working, it's a good day when something is working, greetings, space nerds. I'm the studio host today for the NASA spaceflight broadcast that will bring the United Launch Alliance


of the uh-eh F for the Advanced Extremely High Frequency Satellite six actually not four six because the first one I saw was four and then I didn't get to five, but this is six today, so for the next hour and a half until


I'm going to bring you here some comments from the NASA space flight study that no, no, no.
ula atlas v aehf 6 launch from cape canaveral   26 march 2020
Don't be alarmed, it's a spare room in my house, but I have a green screen and a light and it looks great and then Chris Gebhardt is on his way to the launch viewing site right now. The special media restrictions in place today are only a very very limited number of media, but NASA's spaceflight media representative will be Chris Gebhardt and he has the live streaming camera, so in just a few minutes we should listen to Chris Gebhardt to know he's ready to Go to let me know everything is working correctly. I have the chat here and I can read the chat in real time and then I can see myself which is nice sometimes and right now I'm also on Twitch so I already have it oh I already have it but I can make a Bit of quality control as we get started, there's a lot to juggle here and I'm also the producer of the studio so when I talk I'm also waiting to listen. from Chris Gebhardt to make sure that your remote camera is activated and once you receive confirmation that your remote cameras are activated, we will show you that launch video live, without reusing a feed or anything like that, it's Chris gaybar who will be there in person again with everything that's going on in the world today, a corona virus and all that, first of all, I hope everyone is safe.
ula atlas v aehf 6 launch from cape canaveral   26 march 2020

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ula atlas v aehf 6 launch from cape canaveral 26 march 2020...

I know it's significantly impacting people around the world, so I hope everyone is staying safe and sheltering in place following whatever guidance they have. We're supposed to have very limited media restrictions today so that we don't have a cast of thousands of people at Cape Canaveral today covering the launch. It was limited to a very small number of people. I don't know the count, but I know. Normally NASA Space Flight would have a few people there, a couple of photographers, live broadcast host, Chris Gebhardt, reporter, that kind of thing, we'll only have one person today and then if I'm not mistaken, let me get a confirmation on this. but I think we only had one person setting up the remote cameras and someone in the studio confirmed that for me, if I could, but I think it was one setup, yeah, it was one, okay, thank you, thank you, studio just one. configure there as well, so that's what we're doing doing IO.
ula atlas v aehf 6 launch from cape canaveral   26 march 2020
I just heard from Chris Gebhardt that he is getting ready now, so he arrived at the viewing area, he is unloading the tripod, camera and live streaming unit. sight so low we used to bring those remote camera views and I'll let me know when it's ready in the meantime we can talk a little bit about the mission. I have my cheat sheet on my cheat sheet, of course. the NASA space flight article about the Atlas 5 that is launching the first space forces mission with an EHF 6, so let's see if we can get through here is like this, yeah, this is how we want it to look good, is literally just the web. browser that I'm showing you, so this is the Atlas 5 release today and it's an Atlas 5 5 1, what does that mean?
ula atlas v aehf 6 launch from cape canaveral   26 march 2020
It's a designator for the way ula names her rockets or I guess she designates her rockets and tells them a little bit about how. the rocket is armed so in this picture we have we can take a look at it and yes you can see it's there it's close to me so I can reach it easily. This is an Atlas five five one. What does that mean? It means it's a 5 meter fairing on top so you see that big fairing coming out the side a little bit and going up and actually encapsulating both the satellite payload and the Centaur upper stage.
That fairing actually helps distribute some of the aerodynamic loads to the rest of the rocket because that Centaur, that super efficient upper stage, is super light, it's really light, it doesn't have much structure and for these larger, heavier satellites, the Centaur only on takeoff when the forces are great when taking off from the platform going through it max Q the cen couldn't support the weight alone, so the fairing here, that big five meter fairing, actually helps carry some of the charge past the Centaur to the main booster body, that common core booster at the bottom. a five five one so it's a five meter fairing it also has five SRBs so the white sticks on the side here and I'll see if we can get a better picture of the white sticks on the side that are attached to solid rocket boosters , TRUE?
So Atlas Five is quite interesting, what they do is they fly all kinds of different payloads with it and sometimes you don't need any SRB, you can just use the main engine on the bottom, sometimes you need an SRB and it glides. the launch pad and it's a little crazy, sometimes it takes three SRBs to survive the SRBs and they can change the configuration how many SRBs are on the bottom of that thing depending on what the mission is, what the target orbit is , how much energy you need for that orbit, the mass of the payload, all that kind of stuff, so we have a five, five, one in the second five, this is the second or the first, can someone correct me on that well, eight, and I have news from Chris.
Gebhardt, which he's also winding up as I'm talking, I hope to keep you posted, so it's a 5/5, it's a 5 meter fairing, it's got five SRBs on the side and then the one that represents the engine. on the upper stage so it's an rl10 engine on the upper stage of the UH part most of these are currently flying one at some point we're going to get into some centaur upper stages so we'll start to see an end. Just when we started putting centaurs on the upper stage, but that's what we'll do again if you're just joining us.
I am the presenter of the study for NASA space flight. I'm also on Twitch. I haven't forgotten it. You all prepared Kirk and the porter bear and everyone there. I haven't forgotten it either. I'm managing two streams at the same time and we're waiting for Chris Gebhardt to confirm that his live camera on the Cape is actually the only media person. of the NASA space flight that's at the launch, the actual press area watching this and he's getting the keynote speech from him. In fact, I just saw his remote unit turn on. I'm like, I mean, no, no, really, not really, mr. universe or something like that, but I can see when you turn on your unit and I see that you're starting to log into the Internet and things like that here, so it's not queued up, but it's connected to the Internet and Chris, you can hear me right now.
I know I need you to mark it. I need you to wait for me just a second. We're on the four main remotes. I need to send a configuration to your unit, so it will take me two seconds to do so. Yes, and you are. now reconfigured so these lives are live the ones we use is a remote streaming device that you connect a camera to they are designed for remote management so I can actually Chris G in Cape Canaveral I'm sitting in Charlotte North Carolina I I can log in on your unit and I can start and stop the transmission.
I can point it to different destinations and what I was doing was confirming that your remote drive was pointing to the correct destination so I can consume it. Is that okay, Chris? I heard from Chris that he's all set and ready to go, so let's give it a try. Let's try to switch to Chris G live from Cape Canaveral. Cover on United Launch Alliance. Launching an eh f6. I hope it works. Oh, it will work long enough. Well, we'll see, so I've pressed it and Chris, you're good to go, buddy. Alright, good afternoon everyone and welcome to Cape Canaveral Air Force Station, where you're watching the Atlas 5 rocket live on the launch pad.
See the large ula building just to the left of Atlas 5, which is their vertical integration facility. I managed to get a perfect spot where we could have a good ula mark in the cameras field of view while looking at the Atlas. 5 the big white venti vapor e stick that you see immediately to the right of that building is the Atlas 5 and the star of our show today the Centaur LH the Centaur the upper stage of the Atlas 5 is being fueled with liquid hydrogen it was already full of liquid oxygen earlier on the Gothic, totally Gary and sorry, I needed to say something to my team in the back, but anyway, the Atlas centaur upper stage was already fed with liquid oxygen earlier today, it's being fed with liquid hydrogen right now the Atlas booster, the big golden part of the Atlas that we will see as it rises from the launch pad, was fueled with rp1 kerosene yesterday, immediately after the launch was completed, and is now filling with liquid oxygen to complete the fueling process, the Atlas booster uses ambient rp1 kerosene and cryogenic liquid oxygen and the Centaur upper stage uses cryogenic oxygen and cryogenic liquid hydrogen as fuel and of course, as I was already seeing just when I went into the audio feed The important thing about this on the back is that today we have five solid rocket boosters and it's always an impressive sight when the Atlas flies with solid rockets in particular and flies with the maximum it can.
These are still the Aerojet Rocketdyne ula solid rocket boosters. will switch to solid rocket boosters produced by Northrop Grumman for the Atlas 5 on a mission later this year. I don't think they confirmed exactly what mission it is, but they did confirm that it would be this year when they would make that change. Northrop Grumman previously provided solid rocket boosters for the delta for medium-range rockets flown by United Launch Alliance. Northrop Grumman was also the company through equity acquisitions and things like that that produced the solid rocket boosters for the space shuttle program that produced the solid shell. rocket boosters for the SLS program, they are building the mostly solid fuel omega rocket that will start flying next year as well, so Northrop Grumman is really a real relief in terms of solid rocket technology and propulsion and of course, They have solid propellant. second stage on the Antares vehicle used to launch the Cygnus resupply ship to the International Space Station, so with all that said, we are approximately one hour and six minutes away from our scheduled takeoff time, the opening of the launch window today at 14:57 EDT or Sorry, or 2018 57 UTC, is a two-hour long launch window, so it extends until 1657 EDT or 20 57 UTC.
We wait for it to arrive at the window opening just before jumping into the air. I had been listening to the countdown network and there. There were no open anomaly investigations or anything like that at the time and fueling had been absolutely perfect, so now it looks like everything is heading toward liftoff at the opening of our launch window today and we and I ended up to listen through the communicator. net that the liquid oxygen or liquid oxygen cargo is completed on the Centaur, it is at stable fill or refueling as they call it and the liquid hydrogen fill is currently at 75% and the Atlas is the Atlas booster which is currently 80 full % with a full with its liquid oxygen charge at this point, so the fuel is doing very, very well, so now that we have all that out of the way, let me pause and say what I should have said at the beginning when I jumped in hello and greetings, welcome to Cape Canaveral Air Force Station.
I'm Chris Gebhard. I'm the assistant editor of NASA Space Flight. Many thanks to das, our studio host, for bridging the gap between the time we went on air and the time I was still in the convoy to Cape Canaveral. Force Station, it's super, super thank you and super helpful to have you behind us and a big thank you to our behind-the-scenes producer Michael Baylor, who's also here with us. Michael produces almost all of our broadcasts for us. We couldn't do it without him. Many thanks to Michael as well, so let's first talk a little bit about the big elephant in the room, which is the corona virus outbreak and what's currently happening here, Cape Canaveral Air Force Station and the Kennedy Space Center that shares ground here has different ways of referring to their response levels for this particular outbreak, but basically both centers are at the same level of preparedness, which means maximum teleworking for all non-staff.essential, only mission critical personnel are allowed. on the base right now, this is a national security launch, this particular mission with the advanced extremely high frequency six satellite for the US Air Force and the US military, so which is even if the bases were even more locked down than they already are.
Would this mission be allowed to continue, but we haven't gotten to the point yet where both hubs have to stop missions or something or start cutting missions? Sorry, put the camera there depending on what those missions are, whether our national security missions or government missions or civilian missions or commercial missions, so both bases are currently on mandatory telework restricted to essential personnel only the way they accommodated to the media for this particular mission yesterday, all the media did not get out of their individual cars, they caravaned towards the launch pad to set up their emotes in their own cars, they did not approach each other while setting up the remotes, They maintained that the social distancing that the CDC tells us to do and the Centers for Disease Control and Prevention tells us to do today here in the United States was a big change that significantly reduced the number of media outlets that were allowed in. and the media was limited to more or less one person per organization, with a couple of exceptions for the media who need an on-air reporter and a camera operator as well and force us all to stay at least 20 people . feet away from each other, but there are very small numbers here, we have also been asked to create a video and photography resource group for those of our colleagues who cannot be on base here.
Jim Williams did a great job organizing all of this, Jim is the chief of public affairs for Patrick Air Force Base at Cape Canaveral Air Force Station. Greetings to Jim. He's in his work-from-home goatee phase right now, but he's done a great job of allowing us to have. go here and share our assets with those of our colleagues who couldn't understand it, this is how Cape Canaveral Air Force Station is handling this outbreak to keep us safe but also to keep us able to bring this to you and convey this to you , so we want to make sure we really thank Jim for that, and on my headset here I heard from the United Launch Alliance launch team that the refueling of the Centaur and the Atlas continues to function perfectly with no anomalies currently. it worked, if you have any questions for us, please report them in the chat of this YouTube channel and my producers behind the scenes will go ahead and send them to me and we will answer any and all questions about United Launch Alliance, Atlas, Delta, the next United Launch Alliance Vulcan vehicle, the payload, this particular Atlas configuration, any questions you have about space in general, we'll answer them all, as we do on all of our broadcasts, we love questions about this particular mission, but We will be happy to answer any of your questions and also in the chat.
Let us know we are from all over the world. From where you are, you are watching. We all need a little bit of hope and a little bit and a little bit of something to stop thinking about everything that is happening. is happening in the world right now and we hope that over the next hour United Launch Alliance and Atlas 5 will give us that happy distraction that we so need, but let us know from around the world where you are watching from and again if you have questions continue, go ahead , throw them in terms of fuel, a liquid oxygen that has just reached its maximum level, so it is done with rapid filling and now they are in the process of, you know, something like when you pump gasoline into your car where the main nozzle and any type of pump a little bit more there just to fill the tank, that's what they are doing now with the Centaur, the Atlas liquid oxygen charge is currently over 90% and also heading towards stable filling and refueling again, everything is going very, very well.
You can see some of the fumes coming from the liquid oxygen vapors coming out of Atlas in the distance as it vents on its launch pad about four miles from where I stand. I'm standing right now so we have some questions great great so Michael oh one wants to know okay I'll skip the first two questions and come back to them so we can start our Q&A about Atlas and United Launch Alliance. launched with a question about Atlas and not a question about Spacex. I love you all for that, but we'll answer them, but let's start with a question about this Atlas.
Will the upper stage deploy a nozzle extension today? Pascal Schubert wants to know that you are Watching from Germany, welcome from Germany, know that the rl10, the rl10 on the Atlas is not like the upper stage on the Delta, where there is a nozzle extension that goes down after the boost stage of the main nucleus separates from the


. The rl10 motors are quite stable and quite fixed. So we won't have a nozzle extension on the Atlas today, but today on the Centaur, what you'll see that's very interesting about the onboard rocket cams is that when the Atlas after booster separation, the Atlas booster drops and the Centaur engine is exposed, you will see a lot of tricks and everything related to that RL ten engine as it corrects for dispersions in its orientation that are induced in the stack at the separation of the Atlas booster and as it enters its circuit guide closed where where it flies based on its computer programming, knowing where it has to go and what the various launches and roles of the Centaur upper stage have to be for the AE hf6 satellite to reach its initial Norman, so we'll see a lot of that.
The next question and the next one we're going to answer is what does five five one mean after the Atlas 5 designation and we have a big graph that we're going to show on the screen and that's the specific mission of this. one actually, but it shows you exactly what we mean, so the fuss is that Atlas 5 is the base name of the rocket, but it has different configurations and it's those numbers that follow the Roman numeral five that dictate what configuration of the Atlas is flying. a particular mission, so for this one it's the Atlas variant five five five one the first five means it's flying with a five meter diameter payload fairing the second five indicate there are five solid rocket motors attached to the Atlas and the one indicates the single-engine centaur upper stage for sort of historical perspective with the Atlas 5, so the first number is 4 or 1 because the Atlas only has a four-meter payload fairing or a four-meter payload fairing. 5 meter payload, so the Atlas 5 and then that one.
The first number following the Roman numeral 5 will always be 5 or 4. The middle number can be from 0 to 5 because the Atlas can fly with 0 solid rockets and it can also fly with 1 2 3 4 or 5 solid rockets. The Russian-made RD-180 engine art thrust vector control system in the Atlas 5 booster has incredible range and that is what allows the Atlas to actually fly with asymmetrical 1/3 boosters or five solid rocket boosters like what you are doing today that last number may be 1 or 2 because the Centaur can only fly with a single engine or twin engine configuration to date the Atlas 5 has only flown once with a twin engine centaur upper stage engine and that was for the Starliner mission in December 2019, the twin-engine centaurs will be used on all upcoming crewed Starliner missions to the International Space Station, as well as the Dream Chaser spacecraft that will begin flying as part of the program of NASA commercial crew, not -commercial commercial cargo program and as we go along here, but that's what it means, so I don't forget some of the questions that we had before, so Michael, oh, one he asked and this is my first question, but I wanted to take a ula.
Atlas asks first, but Michael wanted to know what SpaceX is doing on pad 39a. I see some tents around them. Yes, the first thing 39a does is not in the camera view here, but in general yes, there are a lot of construction tents around Elsie 39a in Kennedy. The Space Center right now because SpaceX is an active construction zone for SpaceX as they also build the spacecraft launch and landing facilities there so those are all the tents you see around the Spacex platform right now and Joseph Bondi wants to know. What happened with the C launch, while the C launch disappeared by themselves, their platform has actually just been transferred to Russia because Russia will start using that C launch pad for some of their orbital launch campaigns, so that's what happened with the launch of C. and their platform, but definitely keep up with your questions guys, there's still over 50 minutes left, about 55 minutes before our launch window opens again, all in this It is currently continuing to track an on-time takeoff of 1457 EDT 1857 UTC, so if you have questions, please continue to ask them.
We are here to answer each and every one of your questions. Ula specifically is what we would love, but we will answer questions about any space program and any space company around the world that you have. football Ian what Oh so the first question I know my boss is going to ask so football Ian do you mean real football or American football because I know my boss is going to ask about that and there is definitely a right answer when you ask when you ask Yorkshiremen what? football means, but Ian football wants to know why the rocket is so close to the building, so that's a great question and it's totally the perspective of where I'm standing at Cape Canaveral and how we're looking at it for vertical integration.
The facilities are actually a considerable distance from the launch pad, in this particular view they appear to be very close to each other, but in reality they are thousands of feet apart from each other and Michael, actually, if we have a good classification . aerial view or a nice wide angle shot of slick 41 to show people what I mean: the vertical integration facility is actually outside the perimeter of platform 41, so the Atlas integrates there and then leads to the launch pad and the horizontal, the verts are the vertical integration facility that you see here, they are actually further from the launch pad than SpaceX.
The horizontal integration facilities on pad 40 and pad 39a are one of those launch pads, so they're actually quite far from the pad itself, it's just a it's just a camera angle here, in fact, from our camera angle, if you look at the top of that big white building that has ula painted on it, you see two little white sticks sticking out of the top, those sticks are actually not in the vertical integration facility, now they are the other two lightning protection towers, you know, a thousand or more feet away from that tower from that building, so that should help give you a little perspective on how far that building really is from the pad, hopefully and hopefully we were able to show a graph there, oh we're going to get one in a second so you can see exactly how far away it is, but that's a big question that you know a lot of times when you look.
On things here when you're on land at Cape Canaveral. I'm on the ITL road right now. Things look much closer than they are because your line of sight can align you perfectly with where they appear to be. on top of each other when they actually aren't, hopefully that answers your question Ian, while we wait for it to be okay, perfect and that's the overview of the platform you're looking at now so you can see where that integration facility is vertical. in relation to the actual launch support and the launch towers and the lightning protection systems on pad 41, which is what we are seeing now with the Atlas 5, which is now full of fuel and raring to take a uh f6, the advanced extremely high frequency six. satellite in orbit, so another question, yes, another question we have here, in general, and Michael, correct me if I'm wrong.
I'm doing this without thinking about it. I think this is the 80 second flight of the Atlas. 5 rocket 83rd the 83rd flight of the


5 rocket today remains the most flown american rocket currently in operation. launcher, although SpaceX is right behind them with 82 missions under its belt right now on the Falcon 9 and it's the United States, so not only is it in the lead by at least one mission in terms of the most flown US rocket currently in operation, but it is the most reliable in the US. rocket currently in operation with a 100% success record in its 82 previous missions, this is number 83,so Matthew Matthew Pryor I hope that answers your question your question was what is the vehicle number, it is the 83rd flight of the Atlas and it is the Atlas 86 vehicle that is flying this particular mission today so the Atlas vehicle 86 is flying Atlas Five mission 83 for today so I hope that answers your question, if that's not what you meant please let us know.
Come into the chat with a little more detailed explanation of what you meant if that's not what you were asking and we'll go ahead and answer your question. The big name of the 65 B solid rockets from the shuttle era that were used to flank the entire side of the stack so they can separate at exactly the same time and not bounce off anything or each other, but on the Atlas 5 they actually can because these suckers only burn for 90 seconds, now five of them burning for 90 seconds launch the Atlas very high and very low. very quickly, but if you separated all five of them at exactly the same time, they could collide with each other, so they actually stagger the separation sequence three and then two, three go together to go together and they stagger them by a second and a half. so that they don't interfere with each other or impact each other as they separate from the Atlas, it's a great ask and it's really something to behold as you watch the Drives go out in their staggered formation with each other, it's really It's really cool to see that happen.
Nick Apollo 11 wants to know what this Launchpad is and where the camera settings are. Yeah, so this is Launchpad 41 at Cape Canaveral Air Force Station. It is the northernmost launch pad on the Cape Canaveral Air Force Station side. the spaceport complex here, but the interesting thing is that it is technically on the Kennedy Space Center side of the border transition between the Cape and between Cape Canaveral Air Force Station and Kennedy Space Center, however, the Station from the Cape Canaveral Air Force leases it, so if our launch is technically it goes next to the Cape Canaveral Air Force Station side of the launch log and then to the Kennedy Space Center, although Kennedy technically owns the land on the that is, it's a nice little bit of a strange transition and boundary that occurs between the two, so yes, it is Technically, a Cape Canaveral Air Force Station, owned by the Kennedy Space Center, is at least part of the complex from the spaceport here in the Cape, but there is a big question and as for the camera, I am installed about four miles from the application from the platform on the ITL causeway since launch.
The closest ITL platform is the Delta 4 37 B platform, which unfortunately I can't move the camera to show you, but it is very, very, very close to where I am standing right now, in fact, it is very close to where we are. Standing tall, the ITL causeway is closed 99% of the time for heavy delta 4 missions because it's within the explosion danger zone for that particular rocket and that platform, so yeah, it's very close, it's very close, although I would love to see a delta 4 pass by. From this distance they won't let me but I would love to see it.
You know, for health and safety reasons and preservation of life and all that is important, that's why we have these explosion hazard areas and for every launch of every vehicle. It's calculated based on launch day conditions and winds and things like that, so there have been times where we've been told in advance that we'll hit the ITL causeway and then on the day the particular direction of the wind. all that toxic waste towards us and potentially landing on us if we were here, so they closed the eye tail causeway, so it's kind of a constantly moving target where the media could watch the rocket launches in particular. due to the area we have. to stay away from and that machs disk that minimum distance you can safely reach to a rocket that we impose here in the United States, but it's really cool, perfect, perfect, so that map that you're looking at now is exactly like the map. where I am in relation to the launch pad for today's mission to give you an idea of ​​where I am on the base here, so Matthew Thompson has a great question here: do you use the twin-engine centaur on crew missions for redundancy ?
The answer is yes. but yes, it's mainly used for redundancy on crew missions, if you lose an engine you still have one so it can enable and maintain your ability to abort at particular locations you really want to reach in close launch abort scenarios. recovery forces, but also the main reason they use the twin-engine centaur upper stage on the Atlas 5 for the Starliner crew missions is because they actually really need it, the Atlas 5 booster and solid rockets fly a trajectory much shallower than the normal Atlas 5. Uncrewed missions do that and you sacrifice a lot of performance in the booster with that shallower trajectory and the booster has to pull back a lot further than it normally does.
The Atlas 5 typically accelerates to maintain a force load limit of 5 to 4 to 5 g. on satellites that depends on the satellite intake, but for missions the Starliner crew has to decelerate to maintain the 3G acceleration force limits and that is a big impact on the performance of the Atlas, so you actually end up needing the twin-engine centaur upper stage to barely get Starliner into a suborbital drop trajectory with Starliner having to do a 30-second burn after reaching the apex, the apex of its suborbital trajectory. Starliner actually fires its own engines to complete that orbit insertion, so we really need both. those engines on the Centaur upper stage for Starliner, but the two engines provide redundancy for abort scenarios because there may be cases where an engine would be lost if it were to lose one of the rl10 engines on the Centaur upper stage for a Starliner launch where No It would have enough power left to reach orbit, but it would have enough engine power left to get to a point where, when it takes off the Starliner and aborts, it would land close to the recovery forces, so it provides good redundancy. .
There, to aborted recovery operations and of course if you were to lose one of the RL10 engines very late in the flight, where the other could compensate and recover and still get you into orbit, it gives you that redundancy. get to orbit too, but it's a great question, it's a complicated yes answer to the question you actually asked Babinski utah, hey, how's it going? Is there an engine that sent our launches reserved for satellites or interplanetary probes or is it just our Lantern? Gym teacher, it's just a Starliner and a Dreamchaser that the two have that have the dual engine, they sent out our configuration orders right now for the Atlas 5, there are no planetary or satellite missions that require them from that point on and they should stop and say that.
The dual-engine centaurs were ordered for Dream Chaser, but Dream Chaser actually completely changed to Vulcan, so Dream Chaser won't be released on Atlas, it will be released on Vulcan, but before I make that change, I thank Michael for correcting me on that. because yes, before Dream Chaser made the launch vehicle change, it was going to have a dual-engine centaur upper stage for the Atlas, so right now on Atlas it's just the dual-engine centaur upper stage for the Starliner missions at this point, yes, yes, but what is it? It's intriguing about this right and as they make the switch to Vulcan, the Vulcan centaur configuration will fly with that twin engine centaur configuration as its normal configuration, so while the normal Atlas configuration is a stage single engine centaur upper stage, the Vulcan rocket will have the twin engine centaur upper stage, so great question up there and spacing out, we actually just answered your question.
I see Vulcan will always use a two motor centaur switch between one or two right now, I always used to do all four for the Vulcan rocket so yeah. That's one of the main differences between the two in terms of the upper stages they use. There are many differences in the first stage between the Atlas and the Vulcano, but the main difference in the Centaur upper stage is the number of engines each will use, so right now we are 40 minutes away from the opening of our registration window. launch, it's 14 17 locations here at Cape Canaveral Air Force Station and everything is still moving towards a launch at the opening. of the launch window at 14:57 EDT or 18:57 UTC.
I admit that an hour and a half ago when I was driving I was really worried about the cloud cover here because we had very thick clouds over the launch complex, but they have cleared and now we are almost under completely clear skies, so the trend is definitely heading in the right direction and we expect it to hold for the next 40 minutes as Atlas rolls off the platform, so Tucker Welker wants to know how much this Atlas costs, so what? I'm going to ask Michael Baylor what he does in the background is go to the rocket builder and build the configuration five five one, so he grabbed this particular one the contract for aeh f5, which was the launch before this one, but It was an identical satellite. billed at 138 million dollars for an atlas five five one now the important thing about that is the public figure base that is available through the United Launch Alliance is the rocket manufacturer's website where you can go and see how much a mission of atlas, but this is a US military launch, which means there are a lot of additional things that the military asks of ula that move that price, so 138 million is the absolute basis of what a atlas v 5-1 in this exact configuration would cost a customer if it didn't.
I don't want things added to it, but the US government military always adds things to their contracts which increases the price and that also doesn't include the money the US military specifically gives to United Launch Alliance to maintain its platform infrastructure for these launches which are a Thoreau heritage dating back to the days when United Launch Alliance was the only company capable of launching or certified to launch US military payloads, for which the military paid them a lot of money to maintain the ability to do, some of those payments are underway. away when SpaceX came on the scene and said why would they pay us to maintain this particular architecture instead of bidding on what the missions would actually cost, since some of that is going away, but this particular mission with six advanced frequency satellites extremely high are part of that old-school legacy locked by contracts for military launches that the US government made with United Launch Alliance, which is one of the reasons why United Launch Alliance has launched the six EHF satellites and They are a constellation of six.
This is the sixth and final plan for this particular gun for this particular play, so yeah, I hope that answered your question about what is the price of an Atlas five five in general, exactly how much the US government paid for it. USA for this particular. mission, we don't have the exact figure to give you because it hasn't been published and it's a little complicated trying to figure it out, so the game with radit wants to know if the Vulcan rocket can launch this payload if the Atlas 5 has retired. yes, Vulcan is more than capable of launching an advanced extremely high frequency serial satellite;
In fact, all the missions that the Atlas and the Atlas five in the launch of the Delta four will be combined on the Vulcan rocket. Vulcan is intended as the successor to both Atlases. 5 and the Delta 4 rockets, the main difference here is that Vulcan will start flying while the Atlas 5 and delta four are launching their manifests, so there will be quite a few years of overlap between Vulcan and a few years of overlap between Vulcan and the Delta 4 and several years of overlap between Atlas 5 and Vulcan, but now Vulcan will launch from this exact same launch pad that you are looking at right now.
In fact, they are already building the mobile launcher for the Vulcan rocket and they will be able to simply change Vulcan to Atlas Vulcan to Atlas by changing the mobile launcher that they stack the missions on so that there is a dedicated Atlas 5 mobile launcher that is on the platform right now with this Atlas and there is a dedicated Vulcan mobile launcher and they just switch them and that's how they will do it, the platform infrastructure can handle both. They are still working on many platform upgrades and infrastructure improvements on platform 41 to be able to handle the Vulcan, mainly because the Vulcan will use methane and oxygen for its first boost stageusing Blue Origin's be4 engine, but it will use methane and oxygen for its first stage, while the Atlas 5 uses RP 1 kerosene and that is the main difference between the two stages.
Luke dis o mo wants to know, can you explain the different types of missions that are currently being done? Example, what is Dream Chaser? Sorry, total newbie, no, that's exactly the type of question we're looking for here. We love these kinds of questions because it's really important, so today we're launching a satellite. This is a satellite that will enter a geostationary transfer orbit mission, meaning that the satellite's eventual place in orbit will be geostationary, meaning that it will constantly remain over exactly the same point on Earth. So basically, its orbital speed is exactly the same speed that the Earth rotates, so it consistently stays on the cone constantly in the same place on the Earth at all times.
The Dream Chaser that I was referring to before is a space plane, it's basically a mini. The space shuttle that will be tasked with at least six cargo resupply runs to the International Space Station waits a second. I'm leaving, so there's an off-scale high temperature indication on these upper stages of the centaur, rl10 engine that they've summoned. anomaly team come out and look at that, so Luke, I'll pause to answer your question real quick and come back to it so I can explain what they just said on ComNet about the engine temperature, so there was a call. on the network that had an off-scale high temperature indication on the RL 10 engine, which is the only engine powering the Centaur upper stage, they summoned the anomaly team on the anomaly network to talk about this for those of you who They are not familiar with Atlas launch countdowns and have not heard their countdown procedures.
This is a very normal thing for United Launch Alliance to do. It does not in itself indicate that this is a launch-threatening issue. Anything that arises that is outside the expected range of operations for the various systems, our quote, is classified as an anomaly and the anomaly team is going to look at exactly what it is that they are actually seeing. Is it a real problem? Is it a sensor problem? Is it a sensor calibration problem? something they can accept as an acceptable problem and release it anyway or is it something they really need to stop because this is what they go out and discuss on the anomaly network, then come back and get information from the anomaly team and where they will report to the release director and to the launch teams about what the anomaly team thinks should be the best course of action to take, so just because there is something, there is a sensor that has indicated that something is not correct in the place where it should be in this moment and they've called the anomaly team to go look at it doesn't mean it's a launch stop issue, it just means that something came up that's not within normal parameters, they'll go out and talk about it, they'll come back to us and talk about it. it. what is the proposed arc so Luke goes back to your question about the dream catcher so the dream catcher is basically a space plane it's a mini space shuttle and will be tasked with at least six resupply trips of cargo to the International Space Station as part of the second round of commercial resupply services that NASA signed with Sierra Nevada, which is building the Dream Chaser spacecraft with SpaceX and with Northrop Grumman, so right now we only have SpaceX and Northrop Grumman directing our operations. resupplies to the International Space Station will be joined by Dream Chaser here in the next year or so actual flight missions Dream Chaser will fly on a Vulcan rocket, launch inside a payload fairing and be exposed to space after the fairing payload departs during the dream catcher launch as the crew Dragon capsules and Dragon cargo capsules will be able to return a significant amount of hardware and science from the international space station.
It will land like the Space Shuttle did at the Shuttle Landing Facility here or outside in California and will be reused for various missions, just as the cargo dragons and crew dragon capsules are currently reused for space resupply services. cargo to the station, so those are two different missions and then Starliner. I know you didn't ask, but Starliner is the crew launch vehicle for Boeing as part of NASA's commercial crew program, so it launches right now only on an Atlas five rocket and that's the only rocket on which It is currently certified to fly even though Starliner was intended to be launch vehicle independent, so it could change launch vehicles if necessary, of course if it switches to Vulcan.
Vulcan will have to be certified as a human-grade rocket after it begins flying its missions and will have to go through all the procedures that the Atlas five and Falcon nine had to go through. to be certified to transport humans too, so I hope I answered your question, if you have other questions like that, please ask and everyone listen to the lute, okay, wait a second, it looks like they are going to do their weather report here, but um I'm just standing better so for everyone listening to Luke's question and even though he said sorry, total newbie, those are the questions we want, those are the questions you know, don't feel embarrassed or worried about do that kind. of questions, this is what we're here to answer each and every one of your questions, even if you think they've already been asked, even if you're nervous to ask, do it because it was a great question from Luke.
I'm really happy we can answer it Doug Dory, thank you so much for the super chat. I really appreciate it. You know, we love bringing these things to you during this particular viral outbreak in a pandemic. We will still be here and provide everyone with live information. broadcasts and coverage of these missions whenever it is safe to do so, so we really appreciate your support on this, we love doing this anyway. I hope that in some way it is a good distraction, it is a nice interlude in your day to be able to see a rocket launch from Florida.
I know that it is always an incredible experience when you can see with your own eyes and feel the power of a rocket taking something out of the planet Earth is something that will never return to Earth it is incredible it is incredible to experience that and I hope that these live broadcasts allow everyone who cannot travel to the launch site or who has not yet had the opportunity to do so to feel like they were here with me looking at it. I tried to be as expressive as possible during pitches because that's just me. I always seem to scream and scream when these things are released and I hope you do too at home, so thank you so much for the super chat.
I really appreciate it, so let's go. In fact, go ahead and talk a little bit about the launch process and oh wait, they're going to do the report on the rl10 anomaly, wait, I'll pass on the important parts, but wait, we might be silent here for a second. Miss Instrumentation, your only recommendation is to proceed exactly as I said before. Just because there is an anomaly that they are talking about does not mean that the exact quote has been launched and ended, we have significant evidence that it is just a problem with the sensor and that we have good temperatures according to recommendation rl10 is to continue.
The final quote is what they said online, so we are still on track for a launch in about 26 minutes from now at the opening of our launch window at 1457 EDT, which is 1857 UTC, so Let's talk a little since we have solved that anomaly and we go to the top of our window. Now let's take a look at our release schedule for today because it's quite long, so we certainly won't. I'll be here with you through all of this, um, but I think right now you're looking at you, yeah, you're looking at the timeline of the event so you can see here that's actually the way the Atlas actually works and is. and it's really interesting, so the Arlt, the rd-180, the Russian-made rd-180 engine at the base of the Atlas 5 is ordered to turn on in t minus 2.7 seconds, the RL 10 engine takes about 1.1 seconds to pass t 0 countdown to complete all of its health checks and accelerate to full power so that the solid rocket boosters do not ignite until 1.1 seconds after t 0 because the rocket is still subject to the launch platform as the rd-180.
The engine reaches full power, so liftoff does not occur at t 0. Liftoff actually occurs at a point one second after t 0, when the solid rockets ignite, because once you ignite all five solid rockets, you you go, you go, whether you want. or not, that's a very good phrase and the saying that is used in solid rocket flight technology is that once you ignite those solids, you go, whether you want to or not, you leave the platform and then, then, you can actually see . As we move forward, one thing about the SRB discarding one minute and 46 seconds after liftoff is that it's actually about 16, so actually about 10 seconds after the solid rocket motors burn out, so the solid rocket motors burn out and Atlas continues to charge them for another About 10 seconds before the launch sequence is ordered and there are a couple of reasons for that, they want to make sure that the thrust of all the boosters that have all those residual boosters inside of the solid rockets has burned.
Thanks Jim. completely burned out because you don't want any thrust from those, you don't want the thrusters to keep pushing when you jettison them because you don't want them to potentially contact each other again or the Atlas or something, it's very different. than the shuttle and the SLS in the sense that when the shuttle solid rockets were scrapped, we still wanted them to produce a little bit of thrust so that when they separated and those booster separation engines fired to separate them from the external tank, the thrust residual residue left on them actually took them further away from the shuttle personnel, the same thing will happen with the SLS rocket, but at Atlas we don't want them to be totally empty and without any propellant when we pause, ula pulls them out of the side of the Atlas , so that's why Atlas actually holds them for a moment before letting go and then you can watch him fall?
It's a pretty standard launch profile. From there, the Atlas rd-180 booster will shut down just under four and a half minutes after launch. then have Atlas Centaur separate the stage and ignite the Centaur engine four minutes 42 seconds into flight. It's a long flight from there to the first cut of the Atlas main engine 11 minutes 46 seconds after takeoff and that's probably when we'll have to cut. the transmission here from ITL and I'll give it back to das and Michael because we're going to have to leave the base at that point because as you can see it's a pretty long way to spacecraft separation 5 hours, 40 minutes and 56 seconds after. takeoff and I won't be sitting out in the sun on the ITL causeway for long so one plus is that I'll get kicked out but you can really see how long the mission profile is with the official end of the mission over six and a half hours later of liftoff here today, so that's a good summary of what we can expect to see during the Atlas mission and launch sequence today.
We will be happy. I hope I said your name. Job. Thank you very much for it. Thank you very much for it. super chat I really appreciate you saying: I love the videos, you're great. Thank you very much Frank for keeping us informed and entertained and to keep it up. Greetings from Spain. I hope you stay safe there in Spain too, so let's continue to take some of your questions as we


here in the last 20 minutes before the opening of our launch window Daniel Thomas once said that there is a fourth grader there How long did it take to build the Atlas 5?
That's a big question, which is why it takes a couple of years to build a big Atlas, from when they started bending metal for it and the Centaur upper stage to the rocket configuration seen here on the pad waiting to go live. , so it takes approximately a couple of years of delivery time. to build an Atlas 5 and of course in this one they not only had to worry about the Atlas and Centaur propellant in addition to acquiring the rd-180 engine for the Atlas and the rl10 engines for the Centaur upper stage they also had to build the cargo fairing useful z' they had to hire Aerojet Rocketdyne to build and cast the five solid rocket motors, since they are not, since they are not recovered for reuse, they must be built from scratch on each mission, so, in general, It takes a couple of years to build. everything you now see on the launch pad in thistime and now that doesn't take into account the delays in when this mission was originally supposed to launch and how it has been and put an end to the delays that increase in any schedule just when any of the payloads drop a little. behind or the manifest and the releases extend a little bit further than they were originally planned, but about a couple of years is how long it takes to build an Atlas, yeah, and that's a great question, a great question and also, hopefully , Well. the NSF live stream that can answer some science questions for all the homeschoolers out there, so if you have students at home and you're watching this and they have questions, send them to us and we'd love to. to answer them and kickstart that commitment, there's nothing more scientific than launching a rocket and a payload into space, so right now we're at t-minus four minutes and keeping this is our planned built-in retention that allows teams to make sure to have triple-checked everything and make sure all the work is actually complete before we start the final four-minute terminal count sequence and head into Atlas 5 liftoff so we're on that planning.
Built-in waiting now, the next major event we'll be keeping an eye on is the launch pass/no poll, which will be done about seven minutes before liftoff, so about 2:50 p.m. or twelve minutes from now is when we can wait John wants to know how many launch pads there are at Cape Canaveral, wow what a great question, they are in numerical sequence and you are looking at 41 and 41 is the highest number on the Cape side for launch pads, but in terms Of active number of launch pads, there are only four active launch pads at this time on the Cape Canaveral Air Force Station side.
There's a fancy 41 Space Launch Complex 41 you're seeing right now with the Atlas 5 launches from its future home. From Vulcan you also have slippery 42 to the south, which was where SpaceX launches its Falcon 9 rocket. To the south you have launch pad 37b from where the delta 4 heavy rocket is launched from now on and you have another launch pad further away. This is where last year, July of last year, the Orion ascent aborted that original little Northrop Grumman first stage rocket, from there that one was launched on the Cape side, so there are only four active. Right now, Blue Origin is building its own, which would be its fifth.
You know, SpaceX has landing pads here that are technically launch pads, but they've just been reconfigured to not launch anything other than landing things, but in terms of active number of launch pads that the rockets actually launch from there are only four. on the Cape Canaveral Air Force Station side and two on the Kennedy Space Center side. Great question, okay, so we have a good question here from Jake Farrow and Michael. I need your help on this behind the scenes What is the maximum payload capacity of an Atlas five five five one rocket configuration? We will get eight thousand nine hundred kilograms is the maximum payload that the Atlas 5 5 5 can carry to the geostationary transfer orbit. what is the orbit that it will go to today so those are the announcements of those eight thousand nine hundred kilograms is its maximum payload for the Atlas 5 five a configuration Rafael Graborsky Grabovski I hope I said the last name of his left knee, right.
Very sorry. If I didn't know, how long does ula plan to manufacture the Atlas 5 rocket? That's a great question. um ula has actually only said that the Atlas 5 rocket will eventually be replaced by the Vulcan rocket, but they have not set any strict fast or more Atlas five afterward. At this date they haven't set anything like that for this rocket, so that's why I said a little earlier in the broadcast that Volken and Atlas will share a platform for quite some time, since their service lives overlap here, which is known . they're the delta 4 heavy rockets, there's one I'm looking at right now on pad 37, be here, they won't launch until 2024 and right now that's it, they don't plan to build any more beyond that, they're completely eliminating the Delta 4 rocket family. in favor of Vulcan, so the four Delta have a fairly strong year. 2024 is the last mission for that and the only reason they could go beyond 2024 is if there are launch pads for the missions they have already purchased and acquired for the Delta vehicle line, but it is worth noting that a portion of the Delta 4 It will continue to fly after Delta 4 retires and that is its second stage.
The Delta cryogenic second stage is actually the interim cryogenic propulsion stage on the NASA Space Launch System rocket that will fly. with one of those for at least its first four missions, if not more, part of the Delta will still be produced and will continue to fly on the SLS rocket, but the delta itself will be retired in 2024 or 2025, there are launch pads or loading ramps Helpful for those in particular and we're 14 minutes away from launch, so we're about seven minutes away from our go-no-go retreat at this point, so I'll continue to answer your questions here.
Marcel wants to know if there will be coverage beyond launch, as payload deployment in orbit will not, so United Launch Alliance will not continue broadcasting. So the only coverage we will get will be ula or the air force tweeting the successful separation of the payload at least that is what we understand now and of course Torre Bruno tweeting the three digit number that indicates that a successful Atlas 5 mission and if we see that number today we certainly hope that we see that number today it will be 138 consecutive successful launches for a United Launch Alliance 138 out of 138 it will be today if this mission is successful, which of course we hope it will be, a new buy new B wants to know on the launch pads.
I always see those four four vertical posts what they are for. Excellent question, so they are talking about the four of them. Big hours with big white bars on top that you always see. You can see two of them very clearly to the right of the rocket and you can see the other two coming out of the top of the ula building. Those are the lightning protection towers. Every launch pad here at Cape Canaveral Air Force Station Kennedy Space Center has lightning protection towers because Florida is the lightning capital of the United States and in our summer afternoon period we routinely have storms severe thunderstorms with cloud-to-ground lightning and you don't want lightning to hit any infrastructure on your pad, especially a rocket that might be powered on the launch pad, but you don't want it to hit anything, so these lightning towers They're around all of our launch pads here, so if a thunderstorm passes overhead, which happens almost daily for six months of the year here on the Cape, if there's cloud-to-ground lightning, it hits the top of those lightning towers and then all the electrical energy is channeled through the Cannotary that I can never say this although the cables can attack.
I can never say that word. Sorry, you've gotten to the one word I can't say, but all the wires along those lightning powers are strong in particular ways and then they're anchored into the ground and grounded there so that all the electrical energy from lightning is safely channeled away from the rocket, away from the ground infrastructure on the pad and safely discharged into the ground to protect the systems and equipment on the pad, so that's what you see very, very equipment necessary here in Florida, but also why don't you see them at other launch ranges around the world because not all ranges have lightning problems like we have here in Florida to deal with the Doss battery, yes, the verification of the battery is totally Well, 217 minutes of battery life left so we're good at the moment, maximum data, thank you and Jared and Henning, thank you so much for the super chats again, I really appreciate it, we love bringing this to you.
I love bringing you this. For you guys, I hope it makes you feel like you're here in some way, but I really appreciate the super chats, much appreciated, regards Christy, great job Chris, this guy again, exclamation point with us, with us, with a smile on the face, I love it, I love it, it's okay. The space buff wants to know why the Delta rocket crashes if it catches fire during launch. Yes, this is an amazing question, so some of you are probably wondering: what do you mean the Delta rocket catches fire when it takes off? Yes, it does and it's spectacular and it's kind of on purpose, so we'll get to a delta launch in May or June when this one happens because they're spectacular and we'll cover this a lot more as well, but yeah, basically the Delta rocket uses liquid hydrogen and liquid oxygen as propellant, so every time you have hydrogen and you flow it through the engines to start conditioning them for liftoff, you will always have some hydrogen that es


s in gaseous form and accumulates at the bottom of the rocket , so we have what is known as a radial outward firing initiator system or Rho rates.
They are basically large flares that are fired under the platform and rocket to burn off excess hydrogen, but there is a limit to the amount of hydrogen that can be used. You actually need to burn it to be safe, so for the Delta Four they burn enough hydrogen to be safe and then they ignite the engines and the lighting of the engines ignites the rest of the hydrogen, so you get this huge fireball that the Royals on the side of the Delta stops the rocket at the ignition of its main engine and the Delta four has already caught fire before, as part of its external thermal protection system is charring and burning since that takeoff, but for the Delta that It's completely normal now.
Launch Alliance has really mitigated that in the years that the Delta has been flying, but it can still happen and it's spectacular when it does, but it's kind of by design because they only burn enough hydrogen gas to ignite them safely. engines, so we have a couple of things, the solar radiation is verified to be within acceptable limits, so that's our space, whether we not only care about the weather here on Earth, we also care about space weather and space weather is ready to go. We have launched on time the verification that has been carried out, we are heading towards the opening of our window in nine minutes for a takeoff right at fourteen fifty-seven and 0 seconds is when the count will reach t0 and, of course, the takeoff will arrive a second after that, so Simon Merton Simon Martin wants to know so that all the steps are completed before the go/no-go for the launch, which should arrive here in about less than a minute, so Simon Martin wants know what the purge is, as I have heard.
I've heard it mentioned in the timeline, so blowdown is basically when, once you're in space, there are a couple of different ways you can vent the remaining propellants that are on board your tanks and depressurize the Centaur because the Centaur will not be exorbitant. at the end of this mission it will remain in space, so to make sure it doesn't explode in a couple of years because it's still pressurized, they open the pressurization relief valves and vent that pressure into space, it also releases some of the propellant and the oxidizer remaining out of space too, that's basically shut down, it's just setting the stage after it's done its job to stay safely in space and here we go, the polish "go, no, go, so far, everything goes, they are still probing." Atlas Atlas Booster and Centaur confirm that they are running with all their systems, ground systems are now being retired, ground systems are still polling, everyone is going so far, all security systems are green and going to continue, the director of launch has given the final go-ahead for launch and launch.
The manager has given permission to proceed with the launch. We're all going to launch the Atlas 5 here and in less than 6 minutes, there's less than 6 minutes left until a very happy Atlas 5 takes off from its launch pad. and it will do its job. We have one last question here in the queue before we take our stance getting ready to launch today. Richard Richard Jensen wants to know. Could you explain more about the secondary payload on this particular mission? Yes, I can certainly give myself a quick answer. Secondly, there's one thing I need to do to make sure I'm set up here for the launch portion of our survey and then I'll continue here with the secondary payload, so just give me a minute and we'll get back to you.
Here, yes, let's get to that question. I read it a little prematurely. Here I'm just making sure that everything is set up on my end for what we need for takeoff here today and then We'll go ahead and get to that t-minus fourminutes and counting, we're at the terminal, we're now counting for the Atlas rocket five, three minutes 54 seconds and the ground pyrotechnics have been enabled at this point, so yeah, those secondary payloads you're talking about. so most likely they are air force technology demonstrators, we don't know much about them and their secretive nature makes this an Air Force mission, it's probably something the Air Force is testing that they don't actually they know. they want us to know and since it's one of their missions, they can ride the Atlas very well if we get some other information about it, but we will pass it on, but that's the basic answer to secondary payloads. it's we don't really know and we're at minus three minutes and Counting Atlas is now pressurizing for flight the Atlas booster tanks are pressurizing and the LOX liquid oxygen shutdowns have started how many seconds do you copy that so just to warn everyone you.
As we normally do, you don't have to go anywhere else to see it. We have the Los Angeles feed ready to show when we lose a visual side of the rocket here with our camera, so it's a one stop shop that you don't have to go to. anywhere else, but keep in mind that the information United Launch Alliance sends us is about 30 seconds behind real time, so when we do that swab, you'll hear me mention events that you'll then see about 30 seconds later . So you're going to get actual live footage from me and then you're going to see it about 30 seconds later when we switch to the ula feed, the feed that you're going to get from my camera here is live, but I just want you to know what. wait here, so ensuring liquid hydrogen is already underway.
The launch has been enabled t-minus one minute and the count varies in green and continues to continue. maintain maintain maintain occurred at t-minus 46 seconds recycling the count to t-minus four minutes and the wait is now underway so for those of you who just joined us or heard that we reached t minus 46 seconds before That it was called a wait on the count Michael, I just missed what wasn't ready, what was good? Yeah, so there's a two hour launch window, so just because we're not going to the top of our window doesn't necessarily mean there's a problem, so hold on, don't go anywhere, we're waiting to hear exactly which was good and they are recycling the clock to t-minus four minutes on hold, then something happened at launch, the launch control team had to flip their switch so it wasn't ready, so we're waiting to find out when it will be reprogrammed takeoff again and if they can reschedule it.
I'm waiting to hear what's happening now. I'm listening to the launch network in my years, so we've recycled to the t-minus four minute mark, so we're still waiting for that status update on what happened that caused the last second to be held at t-minus 46 seconds , there is a launch window that extends until 1657 EDT 20 57 UTC again, we're just waiting to hear there and know what's going on, so we'll come back to take some questions in a moment. I'm going to listen to some quiet air for just a minute. I need to regroup out of launch tracking mode and look at some other things to see what was causing the problem.
Right now he is fine and all ula is saying right now is that the cause is under investigation. Okay and if you're just joining us, I'm Chris Gebhardt live here at Cape Canaveral Air Force Station in Florida, where they're looking live at an Atlas 5 rocket. at launch complex 41, the countdown of the launch had gone absolutely perfectly without any major problems; so to speak, until t minus 46 seconds, we reached 46 seconds from the ignition of the rd-180 engine and the takeoff of the Atlas 5 when a hold was requested. one reason we don't know yet, they haven't said it on the launch network and ula is just that United Launch Alliance says the cause of the hold is under investigation, but to briefly summarize right now the teams are recycling the vehicle .
Return to the t-minus four minute mark and holding, which is the stable holding point before the terminal count sequence is initiated at the t-minus four minute mark and counting so that the rocket is stable and the teams are working on all their steps. to - do to keep the rocket in this stable configuration while the teams go out and look at what caused the problem and when they could try again so that we have a two-hour long lunch window. that remains open until it remains open until 16:57 ET today, which is 2057 UTC again, we don't know what the cause of the hold was, the teams are Stone, excuse me, the teams are still investigating that, so that we are going to go. go ahead and come back to some of your questions here if we have any and we'll come back to them in just a second um you'll hear some quiet air for just a second one of the wonderful things about my My job involves multitasking so it was supposed to that he was due to interview Northrop Grumman at 4:00 p.m. m.
Eastern today about their Omega rocket, but when scheduling the interview I made sure they were aware that the Atlas was launching today and they said that if anything delayed the Atlas beyond the opening of the launch window, I would let them know so we could reschedule the interview. so I know I have to go send that email, so I'm going to send that Doss. I do not do it. I don't suspect you'll be able to pick up on the comment here very quickly by any chance. Is it by chance? Yeah. So instead of dead air, we're going to pass it on to you here in about a minute so you can continue to stick with us here on our live stream and start answering your questions, so if you have any questions, throw them in the chat, even if You think it's already been answered, ask it again, we'll go ahead and answer it while you prepare to take care of me.
I can answer one right now. Phillip Phillip wanted to know if we can explain how you came up with the rocket configuration name, example n 2 2 or 5 1 1 or things like that, so yes, for the Atlas 5 there are multiple different configurations, so then that Roman numeral v and Atlas 5 the three numbers that follow it actually dictate what the configuration of the vehicle is that first number can be a 4 or a 5 denotes the diameter of the payload fairing so it is a 4 meter payload fairing or a payload fairing of 5 meter payload today it flies with 5 in the case that it is a Starliner mission and there is no payload fairing, they put an N there to indicate that there is no payload fairing.
The second number is the number of solid rocket motors that are connected to the Atlas 5. booster which can range between 0 and 5 and the Atlas can fly with an odd number of solid rockets and can also fly with 1, 3 and 5 in addition to 2 and for today's configuration it is a 5 solid rocket booster configuration and the thrust vector control system the capacity of the rd-180 main engine on the Atlas 2 gimbal is what allows the Atlas to fly with an odd number of boosters of solid rockets and then that last number can be 1 or 2 and that is the number of engines on the Centaur upper stage, so today's Atlas is a five five indicating a 5 meter payload, a five meter configuration solid rocket boosters and a single engine centaur and a thirsty upper stage oh here we go so the recycling is complete and the Atlas 5 is in a safe and stable configuration and they are waiting to receive information for the launch team on what caused the abort and kicked them out of the terminal count and, according to Torre Bruno, the president and CEO of United Launch Alliance, the hold abort was called due to a red line indication on one of the components of the Atlas.
It didn't get any more specific than that, so basically something on the Atlas and it violated one of its operating limits could be a sensor, could be a real thing. I'll let the teams go away and think about that and two, are you ready to take over the comments here? Okay, so I'll return it to das while I send a couple of emails that I need. I will do to rearrange my afternoon in case we are here until the end of the window. I'll return it to das and then I'll be back shortly and then Mike check that you can hear me here.
Well then. We are ready to return here in the studio. I am dasa. I've been running the live stream behind the scenes and we're waiting, I think we'll have a new time here, so there was a two hour window like Chris was saying this doesn't mean it's the end of the launch, that doesn't mean it's not We will go today. You see different windows happening. You will hear an instant window, which means it is a single shot. The times you go to the Space Station, you have a cargo mission, one of those CRS contracts going to the space station, you'll hear these snapshot windows and for an EHF six here today with United Launch Alliance on those five five.
One, it's not instantaneous, I think it was a two-hour window and we're waiting for them to tell us what the new schedule will be, so I think it's all good to go here. Chris G is doing a fantastic job there. in Cabo again operating under social distancing limited media distancing, what do you want to call it? Limited press capacity at Cape Canaveral today and Chris is there with the livestream camp, everything has been going fantastically. I shouldn't have said that because now something is going to happen. It went wrong with our camera or our modem or something, but knock on wood, it's still there.
I have a YouTube chat here and I saw that Chris went through all the questions and stuff, if there are any other questions he keeps throwing them out. there and we will say that we will continue to wait for a new time, we are just waiting for a new time t-minus from United Launch Alliance to see what our retention will be and how everything has been going for all of you. today let's fill the dead air, not really. I'm always curious where people are watching from, so we're reaching a pretty good number of people right now and do this for me.
I want you to try an overloaded chat. Oh, it was a hydraulic problem. Chris simply told me that it was a hydraulic problem that ejected them; We're still waiting for that moment, but Christa said the hydraulic system, are you okay? It's still listening, okay, they're going to go discuss something. Chris is relaying the information from the launch network to me. I'm like covering my ear if I don't actually have a headset on but look where I love you oh my god how crazy the chat is right now I mean with slow mode on the rocket hunter where's the camera location?
Michael Baylor could put the The camera location goes up very quickly if I switch to the other one, but I look at the people watching from all over the world, not that I like to brag, and I think, look how fast I can read the names of places where People are watching from and I'm sorry, there's not the slightest chance that I can. I can read that there's just no way, but there are definitely people watching from all over the world. That is incredible. I will say that I am very happy. I'm glad we can still offer you these live streams.
I know a lot of people around the world are sheltering in place and not going anywhere because of what's going on with the coronavirus and it's great that we're still able to share this with you while everyone is stuck at home. Thank you very much when Chris G returns. Big thanks to Chris G and some huge props to Chris G packing up his stuff and getting in this car driving to the Cape to bring us. This is the launch video, in fact, I have their launch video. Might bring your launch video again. This is United Launch Alliance running like a Rockets commercial right now.
If anyone needs a Rockets, they can call United Launch Alliance. Rocky Builder Comm. I think that's what they have, the chat is still shifting from people watching all over the world. Space Coast Honda is not sponsored by Space Coast Honda, but that's a place to watch from, I guess, Puerto Rico. Louis, it's all over Germany Kansas City and Chris I think you can still hear what I'm talking about What's your status there? How long are we looking? Yeah, yeah, okay, oh, okay, good deal, do you want me? To continue talking, do you need a short break or is it up to you?
Okay, so Christy had to do a couple things, but I just communicated with him and communicated with him by turning around and talking to a laptop over here. but let's go ahead and give it back to Chris G at Cape, he's ready and we'll get his camera back online Chris, you're okay 200, okay, you know, I have to say a big thank you to Northrop Grumman because as soon as we give them I emailed them and said, "Hey, the Atlas didn't make it to the top of its window and we don't know if it could go up between 10 minutes from now and 57pm." So obviously that won't work for our 4:00 p.m. time. interview, it's great that you cantell that to another rocket company because they fully understand what these dynamic situations are like on the ground.
A big thank you to Jennifer at Northrop Grumman for rescheduling with me, we obviously knew this could be something so we planned ahead. of time, but it's always great when companies understand what's going on, so thank you very much, so yes, as das was able to convey to you, we heard on the net a call that it was a hydraulic problem that led them to t-minus 46. ​​Seconds, they didn't say what's right and Torie Bruno on Twitter says it was a ground hydraulic accumulator that didn't work properly, so you're going to see the exact quote on the launch net was um, it was a hydraulic problem. and we have to go. we're going to discuss it, so they'll do it now and we'll come back with a recommendation here on whether this is something that can be fixed or something that they can except as an as-is condition since it's on the ground and not on the vehicle and launch, but We don't know yet what they're leaning towards, how serious this particular problem is in the hydraulic accumulator on the ground side, so to be very honest with you all, this could be anywhere from where we've left, so we've looked at it, we understand it, we can accept it as is, reset the score on point and launch it; no, this is a vital system that we need for post-launch safety and security operations of the launch pad, so we cannot accept it as is and must highlight the day when it could be anywhere within that range of possibilities, so we don't really know yet, as soon as we do, we'll bring it to you of course.
I bring it to you, but that's where we are now, you're looking at this, so Phillip West commented on how common delays like this are, which is a great question, right? And you know, for the Atlas 5 and Delta 4 family of rockets, these these go into terminal counts and are ejected. They are more common for these rockets for the Atlas 5 on the Delta 4 than with other rockets. You know it is what it is. You know the Falcon Nines don't run into this. all this is often used by the school almost never comes across it. I mean, my goodness, if the Soyuz has a problem, the world is ending, those vehicles are very reliable and they just make money, but you know these things happen, it just seemed like these little glitches. to hit ula at greater rates than other companies or attack systems with ula or attack in a way that ula systems, you have to stop and figure out what it is instead of being able to figure it out as you go and go with it because of how I structured the terminal, the final four minute terminal count sequence is with the falcon with the atlas v, so they seem to be common.
We had a lot of these little problems that delayed the release of an eh f5. In August of last year, fortunately, we did not hit any of them in the Scylla orbiter. We also saw them have a couple of issues where they were making pads on windy days and the connecting lines broke due to the high winds and I needed to backtrack to reconnect them and then get back to the pad. You know, this is all kinds of life in the rocket range and like I said, they seem to affect ula more than other companies, but that's not it. other companies are immune to this, it's just the little things that go wrong in your system as you're working on these incredibly complex operations and you know that launching a rocket isn't necessarily, it's certainly not like driving. your car right where your car can give you a check engine light, but you know you can still drive it 30 minutes to work and everything will be fine.
You know a rocket gives you a check engine light and you better stop and make sure. that you know exactly what he's telling you and a lot of times it's okay and we can continue with the count and we can go ahead and launch today, but those moments of stopping and discussing are very, very, very important, very, very important here too, so that the Atlas 5 is still full of fuel, so I allow you to answer your question. The smoke we see on the rocket is not actually smoke, it is gaseous oxygen coming from the upper stage tanks of the Atlas 5 and Centaur, so liquid oxygen is cryogenic. and you pump into it, many hundreds of you know it's well below 100 degrees Fahrenheit, it evaporates and turns into gas inside the propellant tanks and we have to vent that gas out of the tanks and refill the amount that evaporates. and we call that stable refueling, so right now the liquid oxygen and liquid hydrogen are in stable refueling, so they're still flowing those super cold propellants into the tanks at the same rate that they're evaporating, basically, keeping the tanks perpetually full, but that vent that you're seeing, that smoke that you're seeing is oxygen gas that's coming out of the rocket right now, so again, if you joined us just before launch, we get to t minus 54, we get to at t minus 46. seconds and "hold-hold-hold" was shouted across the network due to a problem with the hydraulic accumulator on the ground side.
Now that's good because it's not the rocket that malfunctioned, the rocket didn't have any problems, it was something on the ground that they were doing. We are discussing now with the United Launch Alliance teams, we are discussing now how serious this problem is, how well it is understood, is it something that can be accepted as is and allow the rocket to launch with just a change to the software. Computer. ignore it so it doesn't kick them out again in t minus 46 seconds or is it something much more serious, something that is needed post-launch for platform security operations and that they simply can't do without, that's the conversation they're having at the moment.
The result of the conversations will be the final report for the launch control team based on the recommendation of what to do today to be very honest with all of you and not know how to hide anything, it could be anything, it is acceptable and we can. Go ahead and take off: We actually need to send someone back to the pad to do something while the rocket is full of fuel, so someone needs to do that and fix it before we can continue counting or we're done. day and we have to clean, we don't know what option they're going to choose, they're talking about it, but in the interest of full disclosure and, you know, so that everyone knows what to expect, those are the range of options those are the three main options we have today with this particular problem, if you can take over for me I could really use water and go get water from someone, so if you are available to take over I would really appreciate it. then i will hand it over to das for a few minutes. das will take you through the next parts of our commentary as I try to find water, okay, work with me there, let's make sure we have microphone, audio, microphone, girl, right? good, good, I'm fine, excellent.
I'm juggling so many things that I literally have to start talking and then see if the audio is getting to the right place, so again let me turn it around like this and we're there. I'm still waiting to hear back from United Launch Alliance on whether this is strange or not. This is not the correct transmission to mention. That's not what we intended to do at all. Let's go back to this chamber here. It's recursion, welcome. to our recursive rocket launch live stream again as I was saying that we are together with a United Launch Alliance that is going to review that problem with the ground equipment that seemed and that we will see if we are going to participate in the launch, Jim, today or Let's go to push this launch again.
It was a two-hour window. We just entered the two-hour window. What are we watching no more than 30 minutes ago? So we still have opportunities to do that today. We still have opportunities to do so. So again. let me watch, open Twitch or open YouTube chat again here. I'm running two streams right now. I'm running the stream on my Twitch channel and I'm running a stream for the NASA space flight, so sometimes we like to tailgate. the scenes and we talk behind the scenes while Chris talks, but I think we're all good here. If you have any questions, you can certainly ask them in the chat.
We don't know when the release is, so not now. We don't know what the recycling time is, we don't know if it's going to change or not, we don't know, we don't know what time the release will be rescheduled for dab please, just dab for super Jets, thanks. You appreciate that I'm waiting for a tow truck. I'm pretty sure they're not waiting for a tow truck. The SRB is reused. No, we are not reusing the SRBs. The solid rocket motors on the side of the Atlas 5 do not. be reused, that's a good question, what is the fuel and the oxidizers?
So, Johnny Koch, you're asking what oxidizer feels like. The SRB of course does not feed the oxidant, but it should be RP 1 and what the oxidant is. I assume it is a liquid oxidizer. on the main stage right there, just a second, wait a second, ok, they didn't need me there. Wow, ok, there are a lot of questions here and I'm pulling them straight out of a chat like a lightning bolt. the difference between an abort on a cleanse, so waiting would be another good question to include what is the difference between a wait and an abort on a cleanse.
I think an abort on a cleanup are pretty much the same thing because an abort or a cleanup usually means we're going to do this another day, a wait usually means we're going to have a new time today, so we can get to a wait and if they say wait, wait, they may still think they can go today, but I'm not sure they just need to wait and check something. Oh, okay, so Chris Chris is telling me that he's listening in the background. There are two different types. It's the company you're talking about. I guess that's true, so we'll abort.
Atlas, when Atlas calls for an abort that means they're not going today, but different companies use different terminology and when SpaceX instead says abort in their terminology, they may still be going later today and I guess just different companies use different technologies, but for this for United Launch Alliance and abort or clean up would mean we don't go to space today, let's revert this to another time versus a suspension across the board usually just means whoa, something's not quite right, Come on take some time to take a look at it and then determine if we are going to go today or not.
That was a good question. This is in Florida. That was another good question. Um, I'm not getting into this. I'm with you on that, our Centaur. the upper stage originally deorbits that to complete the mission I think they are either deorbited or go to a graveyard orbit, they don't just leave them in operational orbits, they have a plan about what they are going to do with them, but I can't tell you like forty verses again they get deorbited and sixty percent go to a graveyard orbit like I don't know that answer in my head but I know they have a plan to get rid of them so they minimize the impact on other operational satellites that's one good question that's a good question um I'm just working for Chet how long will he be in space?
What part are you talking about? Griffin, that's a good question, how long will it last? be in space if you're talking about the satellite, the mission timeline of the satellite is tens of years, right, if you're talking about the upper stage or the boosters or something like that, the SRBs don't go to space, the booster doesn't No I'm going to space, the Centaur will end up in space, but I can't tell you that it will be there for three months or whatever. I don't know what comes to mind and the satellite will be up. there for someone in the studio, do we know the expected timeline of the mission?
Oh, so Chris is listening here too and instead, the reinforcement will technically come above the Karman line, but it won't stay there. There you have it. I like this. I like this. I'm just hanging out and when I answer something, people can help me with the answers, which is actually pretty cool. Chris continues to look for some water on his side, so I don't work for ula, they just have a gift online. in the store and I was able to buy this purple t-shirt. I bought the purple shirt because I stream on Twitch and it was purple and it was $23 right so I don't work for ula and I don't work for the Air Force.
I have the hat here. It doesn't mean I work for the Air Force either. I am simply an independent person who does live broadcasts and I am helping NASA space flight with their live broadcasts and sometimes I speak when they need me. Can you move around? Where are the five thrusters and not six? So why are there five srv? The Atlas 5 can operate in multiple different modes, from zero to five srv, and I guess the answer is that when they designed it they didn't see the need for success or peace. I couldn't tell you that it was because the frame couldn't contain the force of success or the bees, but if it was okay, I don't think it was that, it's just that when they designed the rocket they said, "Hey, Atlas can." sometimes it is launched with one or, sometimes, it is launched without any or, sometimeswith enough time to meet the end of our launch window, which is an hour and 15 minutes from now, 15 minutes left in our launch window, so some time for the team to keep up margin and continue working on this and on everything they just brought me, a gigantic thing of water.
I love him on a second note. I know exactly where the water I intended to bring is and where it is. sitting on my kitchen counter right now, but that doesn't mean anything good in our south, but anyway that's where we are now, so the teams are discussing what the best course of action is, that's what we are waiting, so while we wait. that and to see if they'll be able to resolve it in enough time for launch today or we'll get back to you tomorrow, we'll continue to answer some of your questions, so if you have questions, please keep asking them. them up and Sadie thank you so much for the super chat I really appreciate it and oh das Sadie actually has a question for you so we're going to have to get it back to you here in a minute.
I have a couple more questions to answer here, but it's definitely a question for das. Like, so before I throw that question at Sadie's das, let's go back because, uh, kick ax o k AC zero, I have no idea if I'm saying that correctly, I apologize if I'm not. He wants to know what I'm up to for future releases. Would you recommend the Linda Beach plaque to see? I would definitely recommend Playa Linda Beach to see missions from platform 39a and the hack with Playa Linda and to really help them out. In terms of understanding, it's really cool to see this in Playland, to see some of the platforms at Cape Canaveral Air Force Station, but a lot of them are also blocked by the sand dunes and how far you can go on the beach, so if We are looking at Playa Linda Beach as a viewing location.
I Googled some images of rocket launches that were taken from there so I can get an idea if I'll be able to see the Atlas pad. Will I be able to see the Falcon 9 platform? at Cape Canaveral, that way you don't go there expecting to be able to see it on the launch pad and then find out that you can only see it 10 seconds after it takes off when it passes the tree line. I would always recommend When doing so, no matter where you go in the area, make sure that wherever you go you know that you have a clear line of sight to the platform because as wonderful as it is to hear them and see them, you know that there is something special about looking at them. the engines fire on the pad and the vehicles start to lift off their launch stands and everything, so I always look for that for NASA Space Flight, how do you fire the rd-180 engines?
It's a tea tab like SpaceX's Merlin engines. Yes it is. in fact you can see on the Knight launches, you can see very clearly the green flash of the tea tab that ignites the rd-180 engine just before takeoff, so yes, it's Tito and here's something good to add, because because we'll see it a little bit when the Atlas launches and rolls off the shelf today, so the Rd that made the Russian-made rd-180 engine is a phenomenal engine, a workhorse engine that has a tremendous safety record in success, that's why United Launch Alliance and its predecessor chose them for the Atlas rockets and they chose the RT series of engines for the Atlas rockets, but you will see two nozzles sticking out of the back, but they are not two engines, it is basically a single-engine, twin-chamber rocket engine. it's just one, it's just one combustion chamber that just funnels everything into two nozzles for the thrust exhaust and the power and everything goes out the back of the Atlas, so a single engine with two nozzles is what the rd-180 is and again we'll see that as the rocket takes off and the solid rockets burn up and separate so I wanted to make sure to mention that as they move forward well and we have an update from Tori that Michaels will read to me okay ? then there was a faulty amplifier board in a ground hydraulic system.
They are working on a fix which is the update so we don't have a time frame or anything like that but we still have 69 minutes left in our release window today again it's 15.1548 local time and the release window is extends until two 16:57 local time or 20:57 UTC, so there is about 69 68 minutes left in our window for the teams to work on this and resolve it, we will be with you throughout this to put My boss and Michael They are calm, we have 68 minutes left in the launch window and 150 minutes of battery remaining on the first of the three batteries I have with me, so we are fine, we will run out of window before we run out. drums, that's our motto every time NSF goes live.
I always make sure you have more battery than we know, but anyway, that's our update, that's where we are. This second question was also what is the twitch handle of Daus das Val das das V Ald Easy, that's das is the twitch handle for those of you who were wondering about dr. bacon thank you very much for the super chat. I really appreciate it. Are you asking if I flew to the launch? If that's what you're asking, the answer is no. I didn't fight at the launch. I live here so it was just a matter of running to my car and driving here for me, if that's not what you meant by your question let us know and we'll get it and get back to you so hey if you're listening, Oh wait.
One second, okay, because the atlas stays on long hold here at t-minus four minutes. I was pausing to listen to the launch network while they were talking and they're just doing long hold adjustments to some of the Atlas properties. which they have to do since the vehicle remains loaded with cryogenic fuel for extended periods of time, so they simply keep Atlas nice, healthy, happy and stable until they can resolve the problem and determine a course of action which they continue to do at this time. period, but a doss, if you could hear me, we actually have a super chat question that came specifically for you when you're ready, yeah, so when you're available to jump in here, I'll deliver it to you. for you after I ask you this question if you're ready for this so this specifically came from Sadie Kimberlin and it was a super Chad came in with a super talk and says hey please what happens when a rocket fails? throw that at him now, the right yeah, that was the question for you, can they still hear me like I'm okay?
So, as you prepare to answer that question, what happens when the rocket fails? um let's just go up for those of you who have joined us and have been here with us since 1:30. Thank you very much when we went live approximately two and a half hours ago. Now you know, only from me and the NASA Space Flight team. Thank you very much for supporting us to watch these broadcasts to interact with them. You know, one thing we really always want to do is answer questions. Interact with everyone so you know where you're viewing from around the world.
Let us know if you have questions. Send them. Even if you think they're questions that have already been asked, even if you think they might have already been asked or you're nervous about asking it, especially if you're nervous about asking it, go ahead and ask the question because that same day we had someone who, Apollo , you know? She said I'm a total newbie at this. I'm a total newbie to this and I had a great question even though they seemed a little worried. I'm sorry if you can reach me. Sorry if I'm live. I had to stop to hear what it was. saying in my ear Michael um, maybe who's live let me ask if I'm okay, okay, you're telling me you want to pass that question on to me, okay, I'll go ahead and answer the question that was directed. a a das So what happens when a rocket fails?
This is from Sadie, well she's nice, the answer to that really depends on where in your mission profile you fail. Failure on the ground before the retaining clamps come loose that could result? In anything from a controlled shutdown of the engine on the pad and the safety of the vehicle and systems, the 2d tank and preserving everything to try again could mean an explosion on the launch pad, in which case the rocket, the payload, most of the platform's infrastructure would be destroyed, a failure in the near-ground launch of a rocket could spread debris more than a mile, depending on how close to the ground it was and how far it had gone in the moment of the breakdown of the vehicle. rocket failure, you know, if a rocket failed with one engine off, which a second before the engine was supposed to shut down, there might not be a big impact on the mission anyway because at that point point out that The spacecraft is orbital, so if this were a low Earth orbit mission, the satellite could be more or less where it was supposed to be, minus a few, you know, minus a few meters per second, than on board which satellite and spacecraft may have thrusters on board.
For an encounter that you know we've had, we have to keep this going with the Atlas very quickly because we've actually had a couple of Atlas failures, one of the centaur and one of the Atlas thruster itself, which were not explosive failures but an early shutdown. . failures on a Cygnus resupply mission to the International Space Station, the Atlas booster burn was shut down four seconds early and the Centaur upper stage compensated by changing its pitch angle during its flight and burning the Centaur nearly two, running out of propellant in half a second. of propellant depletion to get Cygnus into the correct orbit, so even though there was a failure of the Atlas booster and a second forced early shutdown of the rd-180, the mission was still a complete success and the Centaur made up for it. and got the centaurs to get the resupply ship Cygnus exactly. where it was supposed to be, if the booster had gone out a second earlier, five seconds earlier instead of four, Centaur would have run out of booster and we probably would have lost the Cygnus vehicle at that point because it would have been suborbital when Centaur ran out. of the booster, the Centaur also failed at an early point in the Atlas race with an early outage and put the payload into the wrong orbit, but the satellites were able to recover on their own and the payload customer ended up stating that the mission was a success. that's how we got to 100% mission success for the Atlas even though they've had two problems with it, so they can fix anything from that to you know, an in-flight explosion of the first stage or a breakup during the flight of the first stage is the end. of the mission, so it really is a wonderful question, Sadie, because it really has a very complicated answer about where in the flight profile it fails because sometimes you can recover and we have it before, but it's a great question, great question, thank you .
So much so that Zac T&T, the space and Learning Channel want to know what our window is. Yes, our window today is two hours long. It opened at 1457 EDT or 1647 or sorry, 1847. Sorry, I'm going to stop and start. that's pretty close to that answer again how long is our release window? our launch window is two hours, it opened at 1457 local time here in Florida which was 1857 UTC and it closes at 1657 which is 59 minutes from now and the time conversion to is 2057 UTC, so we have about 58 and a half minutes left in our window as it stands now and dr. bacon oh yeah then dr.
Bacon had asked earlier I'm sorry, so he flew to the launch and I couldn't understand if you were asking me if I had flown to the launch or what, so I replied that I drove, you actually meant the rocket, yeah, okay. That helps, no, the rocket didn't actually fly to its launch site, so the Atlas 5 rocket, Atlas 5 gold booster, and Centaur upper stage are built to serve Alabama on the Tennessee River and then loaded in a huge river. and a sea ship that ula calls a rocket ship, they are loaded there in Decatur, Alabama, taken down the Tennessee River.
I think it's from Tennessee to the Ohio to the Mississippi and then down the Mississippi to the Gulf of Mexico, around the Florida peninsula and up. to Cape Canaveral, where they then dock at Port Canaveral and then the boosters are unloaded there and towed to their box and integration facility here at Cape Canaveral and the same goes for the Delta 4 rockets built by United Launch Alliance, as well as They build in to serve Alabama put the rocket carried by the River to the Mississippi and then into the Gulf around the Florida peninsula and up to Florida and that is a picture of the rocket, the large seafaring ship from Los Angeles that carries its rocket stages In fact, the rocket was here, oh wait, we have a meal that they are storing in the luncheonette.
Wait a second, let me hear that so I can let you know what's happening. Okay, so it looks like they're just continuing to keep Atlas healthy. and happy and blowing off steam on audits, yeah, so justthey keep the atlas and now you're happy on the launch pad while this long wait continues. I'm not saying anything that's an update or anything at this point, but anyway what you were looking at is still We're looking at this rocket and the rocket was actually here at Cape Canaveral picking up Delta for the rocket stages to take them out of Florida to California for a scheduled Delta 4 mission from there and I believe they are still or just completed the trip. through the Panama Canal and have begun the upward journey to Vandenberg Air Force Base or are or are still blocking their way through the Panama Canal, but that's how ula transports their rockets, yeah, so that's it Great question too and I'm sorry I didn't understand you correctly.
At the beginning, John Faludi, so before I answer your question, John, just a reminder to everyone who is still watching and has been with us. If you have questions, throw them away and chat again, even if you think they are questions that can. They've already been answered if you're nervous about asking them, go ahead, we'll be happy to answer them for you and John Faludi wants to know hydrogen, hydrazine, methane, etc. why all the different fuels are a big question. Different fuels provide different efficiencies for different rocket engines, so basically, when you design a rocket, you have to determine what engine you want and what are the performance specifications that you are trying to achieve with this particular rocket, what do you need it to do? your engines can do. and what propellant combinations with liquid oxygen work best sometimes those decisions are made for you, like when United Launch Alliance wanted to use the rd-180 for the Atlas 5, well the rd-180 is an engine that burns rp1 kerosene and oxygen liquid so that The decision was easy, you have to go with what the engine was already designed to know when SpaceX was designing the Falcon 9 and they had to figure out what they wanted the Merlin engines to be able to do what they wanted their rocket engines and In order for their rockets to be able to work in terms of performance, they landed on our p1 kerosene and liquid oxygen as well, but then when they went to design the spacecraft, they said, well, wait a minute, p1 kerosene no longer works for what we need.
If you want or want me to do it, we'll use methane instead of our p1 and that's how you get to know what fuel you use with your oxidizer and there you have it, you know, for Vulcan and Vulcan was very much the same once They realized they wanted to use Blue Origin's be4 engine, whereas those engines are designed to use methane and oxygen, so the decision was made for you, so it just relates to if you're building it from scratch, what are you doing? what you want it to do and if you choose an engine that is already on the market then you are beholden to what that engine burns and how it runs, that's how they came to determine what fuels and what fuels to use with what oxidizer Monte Arnold wants to know if There is some difference between a geosynchronous insertion orbit and a high energy geosynchronous orbit.
Yeah, okay, sorry. I had to read that again really quickly to make sure I read it right. The glare from my phone is a bad thing, yeah, so there's a big difference between a geosynchronous insertion orbit, which is what they're flying today, which is technically known as a geostationary transfer orbit, where you're not, the rocket doesn't carry the payload completely to geostationary orbit. There are direct-to-Geo mission profiles aimed at geostationary or geosynchronous orbit that can be flown, but the main difference is that in the geostationary transfer orbit you are getting the apogee, the highest point of orbit two thirty-seven thousand seven hundred and eighty-one. six. kilometers, which is a geostationary orbit, but you are leaving perigee, the closest point in the orbit to the Earth, very close to the Earth's surface and in relative terms, so scanning the geostationary transfer orbit is thirty-five thousand seven hundred eighty-six kilometers by two hundred kilometers a. very, very elliptical transfer orbit to what Atlas 5 is doing today, which is approximately thirty-five thousand seven hundred eighty-six kilometers by ten thousand five hundred kilometers and they are reporting on the anomalies, so wait a second, I'm going to listen , so I know what to update you on, okay, so if I heard you correctly and Michael correct me if I misheard any part of this, basically what they did was they took the affected hydraulic system, they turned it off and on again and that's it. . working exactly as it should be and they were asking the release manager and release director for consent to do it again, so they were basically turning it off and on again and making sure all the readings were showing what they should, but that's what I heard, but at one point it seemed a little confusing to me and Michael is that what you heard right, that's exactly what Michael heard, yeah, so they basically turned it off and on again and it's working.
They'll turn it off and on again to see if it's still working and if so, another anomaly will be informed about how they want to proceed, so yes, this is a multi-million dollar rocket ship, but old IT Crowd joke. Have you tried turning it on and off again? Yeah, that's exactly what they did and it worked, so you know, sometimes rocket systems are sometimes ground systems and I laugh because it's such a simple solution, but it worked and sometimes I loved it. Rockets no matter how complicated they are and ground systems no matter how complicated they are work exactly the same as your Apple TV when it fails you turn it off you turn it on again and it works and that's it choose 0 2 0 1 8 0 2 0 1 0 2 0 so that's 2018 UTC correct, so 2018 UTC is 1618 EDT in 10 minutes, did I get it right?
Yeah, t-minus 10 minutes, so we're 10 minutes away from launch, we're still at our 5 minutes and holding, we're still at t-minus four minutes and holding, but now we're 10 minutes away from launch, so give me a quick minute, there will be some calm air while I reconfigure my settings for launch, all good, so here we go. Now with seven and a half minutes left until liftoff, they have confirmed that all red line monitoring parameters are in working order and that everything is as it should be with the Atlas 5 rocket and we are waiting for another go no go post. to continue with the terminal count and start over, you know what is very, very interesting about this and I see another question in the queue to answer before we get into the terminal count, but what is very, very interesting about At the end of the day, this is the hydraulic problem that affected them and they are pulling everything with the Atlas drive.
Now they are pulling all the Centaur's systems. Everything with Centaur is now pulling all non-rocket related elements, included. the rank, everything continues, the surveys are still going on, ula is going, the anomaly chief goes, the ranks go, so the launch directors go and the mission director also goes with the final test with the authorization finale given to Fenner to proceed to launch, so if this seems like deja vu To all of you, yes, we're basically back to where we were an hour and a half ago, which is great for those of you who jumped in and are now back Looking at it, it was a hydraulic accumulator on the ground side. of things going wrong and believe it or not there is a flat rate problem just turning it off and on again and it works and I'm not kidding that's exactly what they did and it worked so sometimes the simplest solution works and Here we are, what we don't hear them say is that they changed something, so if the problem occurs again we will likely get another hold that would kick us out of the terminal count because they didn't change anything.
The system was turned off and turned back on. Everything went well and it was acting as it should, but we didn't hear them say that they were removing any monitoring lines from the automated systems that would stop the count if the problem occurred again, so we hope it doesn't react. We hope it was just one of those little minor glitches that catches you and you turn it off. It turns on again and everything is fine and we can go, but you know, that's where we are now. Quick battery check for Mike and das. We have 125 minutes of battery life left. days days I hear you speak loud and clear.
Again for those of you joining us now for the launch, this is a one-stop shop for the launch. They don't need to go somewhere else. You will see live views of the rocket as it takes off from my camera and live calls will come. from me, but when we lose sight of Atlas 5 and t-minus four minutes and counting, we have resumed counting, now we are in the terminal count, but when Atlas goes up, it comes out over the Atlantic and we lose it from my camera here. we were, we will seamlessly switch to the live stream provided by ula from the unit, however the ula stream sent to us is 25-30 seconds behind the actual time which is on ula's side, not our side , so what you'll hear next.
If we make that change, I'll continue to call out the milestones as they happen and remind you that you'll see that milestone about 30 seconds later on your screen from the various cameras on the rocket, but anyway we're all ready to go here, so we're ready to go. go here about three minutes from our expected liftoff of the Atlas 5 rocket again if this is the 138th United Launch Alliance flight, it is the 83rd flight of the Atlas 5 rocket and it is the 86th Atlas booster that is flying on this mission In particular, the payload is the six advanced extremely high frequency satellite for the US military, it is the sixth of six satellites for this particular geostationary communications constellation, the flight termination system has been turned on internally in this point and everything.
It's still nominally moving toward liftoff, so wherever you are in the world, we hope you enjoy the launch of the Atlas 5 rocket. We're now one minute and 55 seconds and counting until liftoff. Atlas has gone into internal energy at this time and again. you are looking live at Space Launch Complex 41. All fuel lines are towards the center. They are now being purged with nitrogen gas to inert them in preparation for takeoff. All fuel flow to the vehicle has stopped at this time. The flight termination system is now armed. and the Atlas 5 booster is pressurizing for takeoff one minute 20 seconds and counting one minute and the counting range is green clearance to proceed fifty seconds and counting at this point we have passed the point in our previous launch attempt where we were ejected 40 seconds and counting twenty-eight seconds and counting 25 centaur Atlas and the payload are all confirmed we are going for launch fifteen seconds and counting here we reach the end of our count ten nine eight seven six five we have the ignition a little off, it took off here goes Atlas the pressure range of the SRB chamber is going down they are nominal, nominal thrust of the rd-180 engine, the rd-180 has accelerated to 67% thrust as expected, good, everything, an apology for the siren and the car alarm , that was my car.
Atlas 5 decided to activate the car alarm rd-180 no, the rd-180 is now accelerating again at 75 percent thrust. We are waiting now for the solid rocket booster. The depletion of the SRB confirmed that the rd-180 is being accelerated back to full standby thrust. for solid rocket separation. I lost it guys, you got the loop guide. We are now two minutes away. We are now two minutes into the flight and just a reminder. There is a delay on the ula side, so they are hearing the car ice I'm giving as it actually is. It's happening live, but you'll see the events about 30 seconds after they actually happen, okay, you guys are watching SRB Sep right now, they keep screaming two and a half minutes into the flight, there's about two and two minutes left until the engine shuts down. propeller.
That was an absolutely wonderful launch of the Atlas 5 rocket here, so the Atlas V rd-180 booster engine is now decelerating to maintain just two and a half Gs of acceleration, which is what this satellite was built to endure. We've completely lost sight of it, we've completely lost track of it here in the bright day sky, but it was absolutely beautiful when we had it. We have a good view of the wake that continues to float over Cape Canaveral. Air Force Station right now on our live stream here, including a little bit of and we have confirmed the jettison of the payload fairing, just remember you'll see this in about 25 seconds, but we're a minute away from the engine shutdown of reinforcement, but we have confirmation of the separation of the payload fairing.
The RD-180 is currently running at ninety-five percent of rated performance and at this point we are about 40 seconds away from the Atlas V booster cutoff and hey Michael I'm back can you and Luke reconnect the audio yesThey cut their I don't know what happened, oh, here we go. The cut-off of the propulsion motor is confirmed again. You'll see this in about 30 seconds, but we've had a booster and we have good separation between the Atlas booster and the Centaur upper stage of the engine. in the Centaur it is in pre-start and we have ignition at rl10 in the upper stage of the Centaur.
Alright, again you'll see all of this in a few seconds, but we've got a nice burn on the upper stage of the Centaur. Good track record. Good follow up. and good performance on the upper stage of the centaur right now again you will see all this happening, you are seeing it all happening now, but it happened about 30 seconds earlier again, that is the delay in the ula power signal, so now you are Al See the separation, we have good indications that the thrusters on the Centaur upper stage are firing to maintain good body rotation and attitude rates, as it makes this burn very long.
Now it will be 11 and a half minutes after takeoff when this first combustion occurs. will be completed and the Centaur and its AE hf6 payload will be in a parking orbit and we will be able to stay during that, which is good so we don't have to pack up and rush out of the base in this second good answer from the The launch official continues to report here again the rates of our engine and our body. So far, a perfect liftoff of the Atlas 5 rocket. Many thanks to the username for the super chat. We really appreciate it too and we have a report. booster post-flight report that the Atlas booster actually performed better than expected, always good to hear they sounded a little surprised by that on the net, it's normally within predictions, but it was a little better than they expected today for some reason.
I'm sure you'll hear a little more about that later, but it's always better to be above than below your performance expectations and right now the Centaur and right now the Centaur upper stage is being reconfigured to start talking to the satellite tracking and relaying network of data in space instead of communicating with ground stations, so it's going through that transition right now as well. Oh, perfect, and here we are back live at Cape Canaveral, where they are looking at the contrary cloud that has expanded away from Launch Complex 41 here at Cape Canaveral. Force Station, the Atlas, allowed me to go ahead and pan over to the Atlas.
He did an amazing job today and you can also see the contrail up there in the sky from those solid rocket boosters, but let's get back to the ground. because you can see the launched head right here is our launch pad, it used to have a rocket, it doesn't have one anymore and that's what we like to see a happy empty launch pad while the rocket continues to do its job again, the upper stage Centaur Continuing to power its engine, there are about three minutes left in this burn, give or take, so far we have had a perfect takeoff from Cape Canaveral Air Force Station at 1618 Eastern Time or 2018 UTC, about an hour and a half later than initially planned. because a hydraulic problem kicked ula out of the terminal count with just 46 seconds left when they were aiming for the exact top of the window, but a magnificent launch of the Atlas 5 through the skies of Florida here today what you are seeing on the launch pad is some ventilation of the ground systems, there is now about two and a half minutes of powered flight left for the Centaur upper stage before it is in its initial parking orbit once it reaches its initial parking orbit and we have a good confirmation that that's when We're going to exit our live stream here because it's a five and a half hour long mission to separate spacecraft, a very long mission for Atlas, so we'll exit after we have a good confirmation that they're in their parking orbit, which is Basically what we really want to hear, yeah, and when I leave here, we'll hand it back to das and Michael backstage again.
Many thanks to das, our studio host, and Michael, our studio producer, we can't do this today. live scenes without them thank you, thank you very much for that and thank you all for your participation and support, we have approximately a minute and a half left until the first cut of the main engine of the rl10 of the atlas v rockets centaur. The top stage again is a single engine center and again just to remind you that you will hear me make the engine shutdown call and all subsequent calls but you will see it about 30 seconds after the actual time and that is only because of the delay in the ula live stream itself, it's not a delay on our part, it's just a delay on what ula is feeding us, but I have the live countdown loop in my ear to provide it to you, but again, we're just expecting.
Now we are waiting for the centaur to finish the first part of its work and if that happens within a minute or so, it will be in its initial parking orbit, so its initial parking orbit today will be between 250 and 300 kilometers and an altitude superior. At Earth's sea level, the final orbital target it will reach today is 35,000 786 kilometers by 10,500 kilometers, so there is a lot of work left to do after it enters its parking orbit, but what we want is a parking orbit and we should have it in less time. Over 30 seconds again absolutely beautiful. I hope all of you have had the opportunity to feel a little bit like you are here today experiencing it.
I hope you liked the sound on the live stream because the sound was amazing like those five solid rockets. and the Atlas just left here, well, the engine cut-off pressure signatures look good, so we have confirmation of a good engine shutdown. The centaur is orbital in its parking orbit, which is exactly what we want to hear and the RCS, the reaction control system. doing your job to reorient the scenario to be a successful first part of the launch sequence today, the first 11 minutes under your belt in this launch campaign sequence for the 83rd flight of the Atlas 5 rocket and approximately 11 minutes in coast before the next Atlas re-ignition here, so just to review, we're going to put the mission event timeline back up for you here just to review, so we've successfully reached orbit and nameko 1, so which is number 7 on the list of launch events, so we are in our parking orbit, which is exactly where we want to be, we will coast for about 11 minutes before the Centaur engine restarts for about 6 minutes and then we'll go into a really long inertia phase before the Centaur's third burn starts five hours, 36 minutes and 39 seconds after liftoff, so again for the rest of this launch campaign we'll follow along with the United Launch Alliance and we have confirmation of an orbit insertion as expected, so Centaur is exactly where I expected it to be. based on the actual and predicted orbital parameter before the flight, a perfect job of the Atlas 5 booster and Centaur upper stage today, but I'll do that from Cape Canaveral.
I'm going to change it back to das, everyone I've seen from around the world thank you, thank you very much, I hope we were able to give you an exciting launch. I hope we were able to answer all the questions you had about surrogacy. Thank you very much for the super chat we had. I really appreciate it and we appreciate everyone watching from all over the world. I hope everyone stays safe. They will stay inside unless they are essential work personnel, but we will let them know that we hope this gave them an uplifting good time tonight. if you are today this afternoon tonight tonight this morning wherever you are whatever your time zone is around the world if you haven't already subscribe to the art of this YouTube channel and turn on notifications we promise we won't send you spam with nothing else. what a cool rocket related videos, like what we like, what we just brought you today, we are also working on a weekly live ship show to bring to you, we hope to start that on Saturday.
We also hope to start here tomorrow or Saturday, as well as a journal. 5 to 10 minutes about what's happening in Boca Chica YouTube YouTube show where we'll sit down with Mary in the butt and Boca Chica and talk to her about how SpaceX is continuing their spaceship building operations, so we have a lot of things we plan to start during this corona virus quarantine period with you, but thank you very much for joining, please subscribe to our channel if you haven't turned on those notifications to know when we will be live or post a new video. to NASA spaceflight communication, read this article about the launch of missions and read everything about this mission and thank you all for being a wonderful community as you already are.
Thank you so much. It means a lot to all of us at NSF to have our community like As wonderful as it is, thank you very much. I'll do it for me personally from Cape Canaveral Air Force Station. I'm going to give it back to you now in the studio. Okay, let's try to see if we have the correct audio and We have correct audio, that's good, so let's go back from the studio Here I am, das Christian, you're clear, now I can take it from here, you can go ahead, pack the equipment and leave the Cosway again .
Many thanks to Chris Gebhard with the camera setup that brings us the remote broadcast. there, of course, we have Chris' camera from the launch and then when Chris no longer had footage on the rock, we changed the official United Launch Alliance video and there was what you're seeing here in the background so we can do something. replays and stuff, but that was a fantastic pitch, again it was a little late, we got down to t minus 40 something seconds and they called me and the hole that made us end up here almost at the end of the window.
The good news is that Atlas 5 5 5 1 5 s are bees in a very capable rocket having a guidance system that can change its trajectory based on when it is launched, plenty of extra capacity for the window in which it is headed. the orbit. which was sending a uh f6 and gave them a boot window, so even they had a little trouble with the problem. I see I can't actually do that, yeah, I can't do that. Chris we need you to clean your microphone if you can, if Chris could clear your head he goes ahead and turns off the microphone for me.
I know it's mirroring the audio there and I have no control over it from here, but again, they had two hours in the launch window there they were able to resolve that issue, what was happening with the ground equipment, something with the hydraulics and , like Chris said, they literally rebooted it, they literally just rebooted things, turned it off, turned it back on, and watched it. said, "Okay, it looks like it's something we're comfortable doing and they went ahead and made the pitch and I've got the replay here. We can actually watch the replay quickly. This is from the actual broadcast.
Let's go here and let's see". come on, let's show up here, this is a repeat, this happened a little bit earlier, the launch of a uh f6, that Atlas five five one, you see the ignition, you see the water deluge system, the smoke comes out the side, a lot of that comes from the SRB a lot of that comes from the vaporization of water and that stuff comes out of Dodge when this rocket takes off when an Atlas five five one goes. If you ever get the chance to see the launch of an Atlas five five one, you should really try to get there.
It's clearly very difficult for us to do that right now. I completely understand a lot of times, not a lot of times, people live abroad and stuff like that, but it's a fantastic rocket to watch it fly, there are five SRBs that take it off the pad like crazy and it also leaves this kind of big column of smoke. It's a sight to see these SRBs creating this plume of smoke in the sky, but you can see it right there. We will see it all the way to space via the SEP spacecraft. It sounds like five hours from now, so we're not going to look through the SEP spacecraft, I mean, unless you want to, but anyway we'll look through the set of thrusters here, we've got the fairings too, you've got three of them. those thrusters in one. side two of the impellers on the other remember that the impellers can be asymmetrical.
I never played Kerbal. I played a bit of Kerbal but they have three on one side and two on the other if you tried it in the car while your The rocket would be a little strange it would be unbalanced because it would have more thrust on one side but the Atlas 5 thrusters actually have a little bit of a struggle with its nozzle, what it means is that the nozzle is angled a little bit and it helps the nozzle point through the center of mass of the rocket instead of pointing straight to the sides. It's something we can simulate in the Kerbal space program.
It's a little complicated to do, but Atlas 5 with the 5 SRBs in it. I always like to point this out, you see that theExhaust expands here, that's because there's lower air pressure, the rocket is going up, there's an SRB, there's another SRB and you know which ones. on the other side they go too, but you can really sit Wow, the fall of those bees sir, you can really see the rocket exhaust spreading out there because there's not much atmospheric pressure to keep it in a kind of pencil thin flame. Normally you would think of a block as a small rock.
I mean, I guess I could do this, right? You think of a rocket and imagine, if you want, that this is a rocket engine and it has a rocket on top of it, right? that you have this fire coming out of the back and the trick is that a lot of times when you see the fire it ends up looking a little like this so the mouthpiece is a physical structure that helps hold the exhausts together to make the exhaust kind of go in whatever direction you want, but there's no nozzle out here, but there's atmosphere, there's air, right, right?
I'm pushing air out, these are, these are air, atmospheric pressure actually helps push that rocket towards a slightly thin flame. and that's the typical flame that you think comes out of the back of the rocket, but as you go up into the atmosphere, there's less and less air, there's less and less air density, less and less air pressure, and there's no no pressure to help hold it. that into that pencil thin exhaust flame so once you get a cake you start to see the exhaust spread out of course the nozzle is a physical structure so it restricts it but once you get there to a near vacuum in space, the exhaust just beyond the nozzle is almost going straight sideways like that, so that's something that I like to show, it's one of the things that I really like to see and you can see it if you're in Cape watching a rocket take off, you can see the rocket flying through a thinning atmosphere as the exhaust nozzle extends, the exhaust vent expands, that's it, well, there was the fairing, let me, let me roll it back and look at the fairing again, quick, let's see here, yeah, let's back up. and take the fairing, so pause, he didn't bring it back, where is the fairing?
Well check this out, the fairing is cool too, it's two pieces and it opens like a clamshell and you can watch it boi-yoi-yoing. wobble, let's say a little bit of ice broke up there and look at it, you can actually see it's flapping a little bit. The other thing. I have a big question about this, if we watch it in slow motion right here, let's go here and set it. This comes down to less playback speed. See what happens when the fairing passes over the engine. Remember what I was explaining about the exhaust gases expanding directly because there is no air pressure.
You can see the exhaust gases passing through the dirt and the fairing passing through the exhaust. The gases in this interaction here are actually the exhaust gases from the engine hitting the fairing, which is why it lights up like that because there's not a lot of atmospheric pressure and literally what you see on the screen right now is a rocket engine. Right now I'm going to draw. This from the side is a rocket engine like that and there's an exhaust coming out of it, but there's not a lot of air pressure so it's not a pencil thin flame, it's a very extended exhaust and when that fairing gets here , the exhaust is actually hitting the fairing and then you can see right there the exhaust coming off the engine is hitting that fairing lighting it up and you can see some kind of exhaust effect there, so we'll go ahead and let's send it over.
It goes back to normal speed like that click play and then it aerodynamically moves away again those fairings nobody's trying to catch them those ones are going down and burning there's actually a rigid ring so the second thing we saw there is a fairing well come on I don't mind. you do this, there you go, it's actually part of what helps carry the load from the main thruster beyond the Centaur, so it's an internal part of the fairing that's like on the outside of the Centaur and it helps carry that load , so this continues to fly around here is good.
I don't know if there are other questions just scrolling through the chat. I think we're fine. Yeah, I think I'm on the latest YouTube questions. Sorry, repeat that for me, so back in the studio, Michael Baylor is reporting that the second two recordings of the Centaur upper stage are already underway, that it's just started, we're doing reruns, we're rewinding the tape and doing a little BAM. There are some sort of things drawn on it, but the mission continues. Remember that spacecraft separation won't happen for another 5 hours if I'm not mistaken, but they're going on second burn right now, so let me get back to this.
I walk and just to make sure everything is okay. I guess I'm too close to the ground. I'm like a little talking head that has the bottom third right below me. I probably need to count for that every time I pass, but uh, any other questions now, is this a good time for final questions? What is the payload? John ECOT. This was a military satellite. It was an EH f6 and that is a communications satellite shared by the military. There you saw the reinforcement set. the official United Launch Alliance illustration is CGI showing what was happening because they don't have the cameras, they can track it that far to the right.
I'll move on to the rd-180 nozzle gimbal separately or as a unit, that's a good question George Jetson, what you're asking me is the rd-180 nozzles, the rd-180 has two nozzles on the bottom like this and then there's a structure up here like this and then you have the actual rocket, right? You're asking me if they can be rotated together or separately, like you could a vector in that direction and a vector in that direction. I don't know the answer to that, does anyone know the answer? You can go back to the studio. Google, I know a few and I'm thinking Kerbal here, some of the motors will have independent vectoring and then some of them are all on one big frame so even though there are multiple nozzles or cameras it doesn't rotate independently.
Actually I'm seeing if anyone says that with my art, yeah my art, I know what I'm drawing, good art, I'm just trying to do it, oh sorry I just drew a mustache on this guy I don't think that you know. Launch Alliance would appreciate it if, um, you think some people think it's separate for role purposes, I'm still trying to double-check this. I'm the person who wants to check before answering something, they are separate. Michael okay the rd-180's are separate is what I just got back from the studio there again if I don't know the answer that comes to mind I don't want to say oh actually yeah and they tell you something wrong um no sorry It's bad to ask, like call a friend here and just confirm the answer and I have several confirmations from the study.
Yes, you can use gimbals independently of each other, so that's a good question. I didn't know it from the beginning. one, but I always want to make sure I provide good information. I see too many people who just because they can start a live stream say whatever and it's not always completely accurate, right? Let me scroll up to see if I have anything else. look here it's humid, the linear exhaust on future Rockets can be made more efficient for flight Ryan Jack Ryan Jack said it's a shame the exhaust can't be made more efficient for flight, that's why you'll see different engine designs for different atmospheric densities, honestly, art. the rd-180 is an engine that is used for takeoff the rl10 is an engine that is designed so the engine bell is specifically designed to be super efficient in a thin atmosphere and sometimes you can see the difference in the size of the bell of the engine, so if I have something that has kind of a smaller peak that could be something for sea level where you still have part of your engine.
Bell is the right atmosphere that helps you get all the energy out of that exhaust and I know I'm taking advantage of the little screen here and then if you have something that has a very big bell, the RT will start, they already won, the RL 10 has a large bell on the Delta 4, the RL 10 actually has an extendable belt, it gets even bigger and slides out. make a bigger engine bill, another great example is the Wolfhound engine, it's not called a Wolfhound engine on the Apollo, the CSM, the main engine on the CSM was just this huge Bell with this tiny throat and that's because it was 100% designed to operate in a vacuum you want more of this physical structure to help keep the exhaust in the right direction you want it to go backwards so that Newton pushes your rocket forward, so that's a great question and it's something that They absolutely do to keep those things more efficient depending on where you're going to use the engine.
I'll keep scrolling through the chat and see what it is, golden vibes has already been launched, the mission has already been launched and it just sounds like they just cut off the main engine on the comms network and are waiting for the secondary payload to be released so that the second ignition is completed successfully. Scott Van R and mine are numb, they don't recover these SR Bs, these SR Bs go down and end up in the ocean for the Atlas 5 people asking how much horsepower the rocket has the rocket has no horsepower it's not a useful measurement for calculate how many horses per second whatever the power that results, you could try to calculate it but it is not the pounds of thrust and the efficiency of that thrust that are important things, so you will get more or less how many pounds or how many thrust you get newtons of thrust and the efficiency with which you can get that thrust down to a number called ISP, which is a specific impulse and it's actually miles per gallon it's kind of a rough analogy to say that the ISP The specific impulse of a rocket engine is mapped to your car's miles per gallon, it's not really the specific impulse, it just talks about how much bounce you get times your amount of bounce per ounce.
Realistically, it's one bounce per ounce because it just tells you how. How much energy you get from each unit of fuel that you explode and throw out the back of your rocket, but we don't really look at horsepower or torque or anything like that. For engine thrust, we certainly deal with torque when we talk about aerodynamics and stability we were talking about the rd-180, gimbley down here, sorry, dirty, when it's betting and when these gimbal you have the center of mass of the rocket that is Up here, you have a force that is applied at a slight angle to the right and so you get a lever arm and then a torque is applied to it, but in terms of horsepower, horsepower is not a particularly useful number for Let's use it in a rocket.
I'm going to keep scrolling down, I mean, I don't mind replying. At the end of the questions, I'm not Chris G, but I don't really mind continuing to answer some questions. You missed the launch. You can always watch the release here on our channel so you can scroll back on this channel and watch the release. or we will have the video ready as soon as it finishes processing when we are done, let's see here why there was no second stage of falafels with a camera on board. You know I'm not United Launch Alliance they just have a gift shop and I bought this online so I don't work for United Launch Alliance it probably comes down to the customer and if the camera wouldn't be mission critical and the camera wouldn't It is something that the client must pay for and what is important. here's a live camera feed, so a live camera feed that you can see on a live feed versus an engineering camera that United Launch Alliance is still receiving, it's just not showing up on the feed correctly, so I would say it probably comes down to the mission and the customer as to what they are not, they are trying to get information from other stages of the rocket, they are not trying to get likes on Instagram or anything like that, they are trying to place a satellite of military communications in a very specific orbit location with a very high degree of precision so that the satellite can use its fuel to extend its mission beyond the station even longer, so in terms of they didn't have a camera there, wow, what a fool, their number one mission is to put that satellite up there for the client, which was the space force, in this case the Air Force.
Oh, good question. I'm not afraid of questions. I'll answer questions like that. Let's move on. I'm just scrolling down. chat and see if I missed anything else what is the ISP of a RL 10 that's something I would Google I would just Google the RL or the ISP of a RL 10 I don't know that one that comes to mind. I could teach a lot of the ISPs about engines and the Kerbal space program, but I can't get them out of my head. Could you repeat that four four nine four four nine so back from the studio again our experts in the background, which was Michael Baylor?
The next space flight said to be for 49 seconds was the specific impulse of RL 10 on the Centaur upper stage. There you see, all I have to do is talk long enough. If I run the tip of my mouth for long enough, I can get thecorrect answer. my ear over here very good, very good, um, let's see, can you see, oh wow, Terminator, you're saying you can see it flying over Wales, UK, you should try to take a photo of that, if you could, that's cool, right? Was he on a trajectory? that was flying over Wales, you know about the ISP, but what is the ISP?
The ISP is the number of seconds that a rocket can, I guess, basically float based on the unit of fuel in a unit of fuel, it's the number of seconds that you can use. a unit of fuel produces a specific amount of thrust and the more seconds you can produce that thrust the more efficiently you are using that unit of fuel, the fewer seconds you can produce that thrust the less efficiency you are losing that unit using that unit of fuel makes sense . I know it's a little strange to describe, but specific impulse is measured in seconds and it literally talks about the number of seconds you can generate thrust per unit of fuel, so imagine if you had an engine, these are my engines, they are very Kerbal, right, this is an engine and it has, let's say, one unit of fuel and I'm just going to make up units here, just one, one unit of fuel and if you use that fuel you blow it up and throw it in the back how many seconds can you produce X amount of thrust if you can only produce it for 200 seconds because your engine is a poor 3000 or whatever the engine is called?
If you have another engine that is really look, I will also draw it with a larger engine bell. If you have another engine that is efficient like the RL 10 and has the same fuel unit and is creating well, the RL 10 is optimized for vacuum, so let us know, go ahead and put the thrust coming out of the side that way, the RL 10 could use that same unit of fuel and produce that amount of thrust for what it was for 49, so higher specific impulses are better. The higher the specific impulse, the more seconds that unit of fuel can use to create that amount of thrust.
Does that clarify it for you? I like it, I like my drawings, oh, let's see here. I'm scrolling down because, again, no. I'm not watching this in real time. I'm just scrolling and seeing if I missed anything. Do we know the real frequency of the satellite? Kevin Caldwell if you're trying to put on like a war game and log into the military satellite. I don't know the frequency of the satellite. I'm not sure it's something you can Google. I'm going to throw it out if that's what you were asking, if you mean a frequency like the orbital period of the satellite, that might be something we could look for, but if you're trying to write a lot and then say I'm in, it's not something I even if I knew I would tell you on a live stream, I'm just. saying I'm still scrolling down what's my name what's my name I'm das so when you say studio host John das Galloway that's me I normally stream Twitch but I'm here helping NASA space flight doing studio hosting like this that when we're doing scene changes, setting up the remote camera and that kind of thing.
It's me here from the NASA spaceflight studio live from Charlotte, North Carolina, which isn't really a hotbed for spaceflight activity, but I'm here, let me keep scrolling. for the nozzle extension Scott friend, what's up Scott? When did you sneak here? You actually responded in the chat I wasn't looking in the chats um you said that rl10 gets up to four sixty five seconds of specific impulse well I should have Skyped with Scott and he could have done this specific impulse explanation much better than me, Friend, how are you? Thanks for stopping by and saying hello in the chat.
Delta for the second stage has a nozzle extension that provides better performance like ATZ. and literally extends the mouthpiece to restrict exhaust and get a little more value for the money. Wow, you have clear skies in Scotland. I wish there was a way I could highlight Scott's info here because on Twitch I can set Scott as a VIP and every time Scott talks on my Twitch stream it says it's highlighted so I don't miss those things you're chatting with from work right now, I still write code from work, no joke and also said orbital period. It will be 23 hours and 56 minutes, there you have it, how did you cut your face and body at the bottom of the screen?
It was a transmission accident, it was an industrial transmission accident and like here there was a camera angle at one point and it's literally from the armpits down. I'm just not like I exist beneath what you see on camera. I'm going to leave that there for you, it's a camera angle and its camera crop, scrolling down. I'm scrolling down, let's see again. I'm not reading questions from a queue or anything. I'm just taking them myself, let's see what it was here, hey Joseph, how are you? Stay healthy and safe. I'm sheltering in place. food and stuff like that just critical outputs and stuff, but uh, give it a blue key, put it on the hook to moderate.
I don't think I would wish that on mr. Manley, I don't think I'd want to moderate Scott's YouTube live chat, so am I missing something else? If there's nothing else that needs my telestrator skills, this is a program called Epic Pen and it's a Cintiq drawing. tablet that I use to write things down on the screen. I have been using this for my Kerbal Space Academy training camps and my Kerbal Space Academy practical lessons. I do live streams where I watched a lot of Scott Manley and then I thought I could do that and I do live streams on Twitch where we teach people how to play Kerbal space show live so you can answer questions the last few days with everyone like back at home.
I've been doing what I call Kerbal support every day, so whatever your skill level wherever you are in the Kerbal space program, even if your question is what the hell is Kerbal, you can talk on my channel from Twitch, which is slash das Valdez and every Day, I've been doing these live Kerbal help desks helping people learn some Kerbal, but honestly, you can't go wrong if you watch all of Scott's videos. Do you know Scott? What do I like to say? I say Scott has forgotten more about rockets than I will ever know and that is definitely true.
I happen to have more free time than him, so I can sit here and draw pictures of rockets on a live stream. This is my real job. This is what I do for a living. Centaurs that fly safely. cute centaurs flying safely see if I mean anything else please say your name on the screen and clap are we at the circus or a live broadcast? I'm not at all. I mean, I'd be happy to answer a question related to rockets or spaceflight. for you, but in terms of trying to say Evan like clap or something, I'm not going to do that, really, what is this?
North Carolina and I traveled. I have live streaming kits that I carry and stream from museums, we stream from rocket launches. The kit Chris is using is something I put together and they used to borrow from a mine and then they gave him a shopping list and they bought their own kits. We're using Labview solos, so this here is a live view solo and the live view is fantastic. This is a news team, so you'll see this as a news van. This is the same kind of thing that a news broadcast would use, like a remote control from the side of the road or whatever, and Chris actually had one of these units on the Cape.
These are modems, they are 4G modems, basically USB sticks and we had a couple too. I don't have one on hand, but we also had a few access points and the unit Chris was using live can only combine four different internet connections and literally requires an HDMI input. You see the HDMI input there, so this is how Chris was able to bring you our live camera from Cape Canaveral today he was on three Internet connections and I was here in the studio monitoring his Internet connections and I can tell you Oh, AT&T is disconnecting, the AT&T network is getting saturated, the unit will automatically queue Install Verizon modems if AT&T doesn't handle it, but a big thanks to Live View for helping us with these streams and actually sponsoring some of the things I do, so this is the magic behind getting those remote cameras from the field. um, go ahead, make great use of your free time.
Thank God. I have made great use of my free time. I just talk a lot, friend Scott. I don't know if you were here for my cosplay before. I did it. a little Torre Bruno cosplay and I got my hat and then I also had my book here, so for a while, while I wasn't busy, I sat or ate on the taming liquid hydrogen of the Centaur upper stage rocket. from 1958 to 2002 is not a helmet or anything that is not rated for walking around a lunch platform. I happen to have one of those sitting here in the office.
I'm jealous that you got a physical. They were reprinted on Amazon and I literally saw it on Amazon and it was like a next day print thing. The production date on the back of the book says it was mira. I mean, I thought this was cool. I don't know if you can see it was made in the USA Columbia, South Carolina on March 7th so I ordered it as opposed to the 5th or 6th they printed it later and shipped it to me and I've been working slowly but safe. I wanted to learn about liquids. hydrogen as fuel and stainless steel welding, so yeah, I guess it went overboard very soon, very soon.
I'm about to close it if there are no more questions I'm saying. I think we're getting closer quickly and I have a lot of monitors around me right now. I wish I could take the camera and show you the rest of the room, but when I read the chat, I turn in this direction when doing production scene chases and things like that. I turn in this direction when I do Telus tration. I veer in this direction when I do studio stuff. I turn in this direction when I need to communicate with other NASA spaceflight people. I turn to the laptop.
All the way here I have five screens around me right now running four different live streams on six different internet connections, resulting in two different ones. I had a graph I was mentioning earlier. I don't think I have the graph above. ya, but anyway, oh yeah, oh, here's my graphical look, oh no, that's a Kerbal creation, that's not the graphic anyway, there's a graphic somewhere around here, this was the magic what makes all these live streams happen remote cameras in the field Chris G with NASA space flight was up here he was working solo he was going to broadcast a light broadcast on NASA space flight live stream this is my studio I have a camera I have two cameras pointed at me right now for two different streams I'm using open streaming software and one-on-one and live sessions anyway.
I was explaining on my Twitch stream because I'm live in both places right now. I was explaining the behind the scenes of what I do to make these streams possible, so if you're interested in learning about streaming or whatever my Twitch channel is. I try to do these procedures on how this all works. I'm always happy to answer questions, but I think so. I need a mirror like a big mirror to hold and point to. things so you can see the other monitors, I can't actually do that because I call one of these I call a health monitor like a safe monitor and if someone put a link in the chat, I can open that link in a so it wouldn't show it on the stream and I would just make sure they never dropped me or whatever, and then if I know this link is okay, then I could bring it in and show it to the rest of the stream, so what was your signal strength on Wallops?
So it's a little bit more difficult when I'm out in the field to see the signal history, but our upload was fine on Wallops, we didn't have any problems getting six and six bits up I guess. I mean, the other thing I can show this really quickly. I don't know if you'll find this interesting or not, but I was managing Chris's modems, so I took a screenshot from somewhere else and while Chris Gebhardt is in the field. I'm actually connected to your solo, so you have one of these attached to the tripod that runs your camera and I can log into this device and I can see it in real time from the studio here just through a web browser, so I can see when he was there I had it connected to three different modems and there were two AT&T modems on one Verizon modem, so in this snapshot I took, the 18t modem was at full power and the Verizon modem was on full power. and the other 18T modem was at full power so we got a total of 5000 372 kilobits and that varies a little bit but all of their modems were in good shape and we watched them during the launch like we did when Starliner ?
Verizon's network was completelydrop and I could see on the interface that we were not receiving any bandwidth from Verret. It was this. I wasn't getting any bandwidth from Verizon and we were stuck on a single AT&T modem for the live stream which Chris made it for that so I stay back and if his camera goes down we can switch to the official stream we can bring an audio. I can go in and I can start making comments if the camera we have on the field completely falls off or whatever, but that's my specialty, right, I play a lot of Kerbal, but I also love live streams and this is what I'm doing, can you hear me now?
No, I only need only about 100 to 150 kilobits to get good audio. Chris in the field, so I might have a really bad video signal, all pixelated and stuff, but I still get good audio as long as I have 120 150 and I can put his audio on the official stream like we did before, so It's like I'm the backup anchor here I guess I actually have a black magic ATM. Many of us use a mini black magic ATM for our in-person events at the museum, so we did on the NASA Space Flight Channel an interview with Allison Bollinger, who is As a NASA flight director, we were sitting in the Intrepid museum ago a couple weeks and it was kids week and Allison did a presentation on stage and then sat down and did a NASA spaceflight Q&A with me and my friend EJ.
Twitch and we were using an ATM to switch cameras and stuff, so we have one of those that we use for specific things here in the studio with all the capture cards and on various computers. I have two computers here that I'm using, I don't need the ATM for what I'm doing here because I have capture cards and I use the computer to make the change, but anyway folks, I'm going to go ahead and close it here now. In terms of the NASA spaceflight livestream, I appreciate everyone coming out again today. I know the world is a crazy place these days and I appreciate that we were able to share the launch with you and not just give you a video, but give you a community.
I get to hang out with him, it's really cool to see people asking questions. Chris G knows a lot about so many things related to space flight and it's great for ants to see people asking the questions Christian assures them in real time and people talking to each other and stuff like that I don't even like the term social distancing can we be physically distant but we are socially integrated we are socially all together when we get together to see things like this and the NASA space flight launches rockets. I do a lot of Kerbal Stuff on livestream and buy all these powers combined, we're really happy to be able to bring this and share it with you guys, so I'm going to go ahead and close the NASA spaceflight stream right now, I'll probably end up doing some carbyl. support on my Twitch channel a little later, so again barra das valdez das VA al Dez if you want to ask questions about Kerbal, but this marks the end of NASA spaceflight streams so far, He still remembers that there are five others.
About a few hours before the payload separates, so we don't call the mission a success until the spacecraft has successfully separated, but it looks like everything was working nominally, all the lights were flashing the way they were. They were supposed to, so we'll continue. Stay tuned and wait for the success of the mission. Follow us on Twitter at NASA's spaceflight website. NASA Space Flight Communications. You can keep all of those places updated and in a couple of hours here we hope to get confirmation of a successful separation of the spacecraft for an EHF. 6 but for now das valdez says goodbye and i will see you nerds later, i'm the guy who really has to get out of the picture.
No, it's just me, so where's my there? Later, nerds, ok, we should go there. Oh no, it's going to crash, it crashed, of course it crashed.

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