Name: Starlink Mission
Uploaded: 2020-03-28T17:32:23.000Z
Duration: 26 min 26 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

It is 9:55 a.m. Eastern on the February 17th and you are looking at a live view of the Falcon nine as it awaits its targeted 10:05 a.m. Eastern time launch from Cape Canaveral Air Force Station in Florida.

Happy Monday from Space X headquarters in Hawthorne, California My name is Lauren Lions, and I'm an engineer on the Starling team here at Space X and welcome to our live webcast of our fifth styling mission.

Today's mission will be the fourth flight of the booster that you see on your screen.

Most recently, it flew back on December 16th which represents our quickest booster turnaround to date.

And if this launch goes as planned, it will mark space exes, 80th successful launch and 50th successful landing.

On top of that, we will again be attempting to catch both varying halfs with our recovery vessels mystery and this chief.

Now we've got a shorter mission duration today, so we won't see those views alive on the Webcast, but we'll push out an update one way or another.

After the fairing has made its way back to Earth, we are continuing to countdown to liftoff But if for some reason we have to call a hold on today's launch, we do have a backup opportunity tomorrow.

Tuesday, February 18th at 9:42 a.m. Eastern.

But at this time, all systems are go for an on time liftoff.

My name is Jesse Anderson, and I'm a lead manufacturing engineer here at Space six.

As Lauren mention, today's mission will be shorter than previous Starling missions, and that's because we're executing a direct inject of the Starling satellites into an elliptical or oval shaped orbit.

In prior starling missions, we deployed the satellites into a 290 kilometre circular orbit, which required to burns of the Merlin vacuum engine on the second stage.

Keep in mind, the stack of 60 Starling satellites combined is one of the heaviest payloads we fly.

So putting them directly into this orbit requires more vehicle performance and makes recovery more challenging.

Going forward And starting with today, we will deploy the satellite shortly after the first burn of the second stage, putting the starling satellites into an elliptical orbit.

Once checkouts are complete, the satellites will then use their onboard ion thrusters to move into their intended orbits.

and operational altitude of 550 kilometers.

With this change, our Webcast run time will be a little bit shorter.

Will rack up, wrap up just a just after deployments AT T plus 15 minutes or so The Falcon nine that you see on the pad.

There has been loading propellants since t minus 35 minutes, and as a reminder, we use a rocket grade kerosene or RP one and super chilled liquid oxygen or locks to power.

The Falcon nine Currently R R P one is nearly fully loaded on the first stage, which is the bottom 2/3 of the vehicle that you see there on your screen.

And at this time, the second stage is fully fueled with RP one locks.

Loading is underway on both stages, and we'll continue to be topped off right until after, uh, right until the last minute of the countdown.

The stack of 60 satellites is safely enclosed inside of the 17 foot diameter payload fairing, and there you can see on your screen is the flat stacked satellites.

Um, there is thief faring at the top of the vehicle that pointed enclosure there.

And once we reach the vacuum of space, we will deploy the faring as the second states continues on its way to its final orbit.

As for whether we had some rough weather over the weekend, but so far today weather is looking good for an on time launch.

We will continue to monitor this monitor this all the way down to T minus zero, Therefore, in Strange is prepared to support today's mission.

So with that, the vehicles, satellites, weather and range are all looking good for an on time lift off just a few minutes from now, as I mentioned at the top of the way Cat Webcast, today's launch will be the fourth flight of this particular Falcon nine booster.

This booster previously flew on a Dragon Resupply Mission Sierra 17 which foods of the space station in May of 2019 followed by CRS, 18 in July 2019 and most recently, a commercial satellite launch on December 17th 2019.

It's been just under eight weeks since that booster returned, which makes this our fastest turnaround to date.

Long term, we hope to continue to drive that turnaround time down even further, with rocket launches looking more similar to commercial air travel.

Where the planes get basic checkouts, they get refueled and then they head right back out.

Space X successfully landed its first booster back in December 2 2015 after a long series of attempts with various endings, some more spectacular than others.

And if we land two days booster, it will mark our 50th successful landing.

It's really crazy to think just how much has changed in only five years.

Our drone ship, of course I still love you, is currently stationed 350 miles off the coast of Florida, waiting for what will be the fourth landing of this booster.

Just as we had to work through a lot of trial and error with booster recovery, we're now engaging in that same process for faring recovery.

To date, we have caught three faring halfs with our recovery vessels and fished a number of others out of the water and will continue pushing forward with this effort with the goal of hopefully making this as routine as our rocket landings.

We're currently just over four minutes from liftoff.

Falcon nine is now moving into the final stages of the countdown AT T minus seven minutes, engine show began.

This is where we allow a small amount of these super chilled liquid oxygen to flow into the Merlin engine.

Turbo pumps prior to the full flow of liquid oxygen into the vehicle that's avoid any shocks to the system.

Liquid oxygen is also what's creating those white clouds around Falcon nine.

As you can see on your screen, we continue to load super chilled liquid oxygen or locks into the stage until just before liftoff.

And when that super till locks comes in contact with the ambient air around it, it creates those clouds surrounding the vehicle that you can see right there at T minus 3.5 minutes.

Um, the transporter rector has already moved away from the rocket slightly, and this allows some clearance for pocket nine to lift off of our launch pad.

The first and second stages are both nearly fully loaded with £1 million of kerosene fuel and liquid oxygen.

First stage should finish prop loading at T minus three minutes and second stage at T minus two minutes at T minus 60 seconds.

Be sure to listen in for the call out that Falcon nine isn't startup.

This means that the Rockets autonomous internal flight computers have taken over the launch countdown.

The Starling payload continues to be healthy.

The Falcon nine team is tracking no issues on the rocket.

Weather is looking good and the range is green for launch.

So let's listen into the last few minutes of countdown Knocking Night started Healthy is go for launch.

Nine four two Yeah, our T plus 47 seconds.

And we have just had lift off of our Falcon nine vehicle, taking our starling payload to its targeted orbit.

In about 15 seconds or so, we will be passing through Max Q.

Is the maximum aerodynamic pressure that the vehicle will see throughout.

You should hear that call out in about five seconds or so.

Falcon nine is experiencing maximum aerodynamic pressure, and there's that call up from Mexico.

You coming up next in about a minute, will be three events happening in rapid succession, the first of which will be Meeko, or main engine cutoff, followed immediately by stage separation.

And this is where the first AIDS separates from the second stage and then followed by S E s.

One beckoned until you could see on your screen.

This is a nice live you looking after on the vehicle so you can see those Merlin engines burning real bright right now with earth in the background.

If you're just now joining us, the next three events coming up will be Mico remain Engine cut off stage separation.

And as we mentioned today, we will only be having one burn of the second stage.

And there we've just had Mico main engine cutoff and stayed separation of and second engines start one on your right screen.

That engine is starting up and should be turning bright red shortly.

Here, there it is now, coming up in about five seconds.

Deploy should also be able to see this on your screen.

Derek separation confirmed, and there is faring deploy.

Now both faring halves are making their way back to Earth.

Let's hope that we can catch both of them today on mystery Miss Chief.

Okay, Stage two continues to burn nominally with those 60 StarLink satellites up on top while Stage one begins.

It's the sent down to the drone ship, so coming up very soon, we're gonna have a few events on Stage one.

The first is the entry burn that's coming at up about T plus six minutes and 48 seconds or so.

That's where three of the M one D engines are going to re ignite, and what they do is they slow the first stage down as it re enters the upper part of the earth's atmosphere.

That burns gonna go for about 20 seconds until you hear the call out stage one entry burn and about a minute and 1/2 after the conclusion of that entry burn will be the landing burn.

Now that's where we re ignite the center E nine engine on the bottom of Falcon nine on the first stage, and what that does is then slows the vehicle down to zero velocity as those landing legs were deploying and hopefully placing this stage on the drone ship for the fourth time and hopefully marking the 50th successful landing of a Falcon nine boost Stage two trajectory continues to be nominal.

We're hearing that em back power is good, and everything is looking really awesome.

Stage two is burning with more than £210,000 of thrust and the 60 satellites that are on top of that second stage, you're going to join the previous batches of starling satellites already in orbit.

Further feeling in our constellation, which gets us another step closer to providing high speed, low, latent see Internet access to people on that beautiful blue planet right there.

Targeting places where broadband connectivity options like fiber are too expensive, are unreliable or even, sometimes completely unavailable.

We're about 15 seconds away from that entry burn.

Hopefully, we'll see that plume on the left side of the screen.

And as you can see, that entry burn has begun.

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Starlink Mission

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