Good evening from Hawthorne, California.

It is December 22nd just after 5:12 p.m. Pacific time.

Welcome to the Webcast of the Falcon nine Mission carrying the fourth flight of 10 radium.

Next satellites.

You're seeing the live view of Falcon nine as we prepare for launch in just over 10 minutes.

Sunset just having occurred here on the west coast of the United States.

Launch is scheduled for one hour, 27 minutes, 34 seconds.

Universal time or 5:27:34 p.m. Pacific Standard time.

I'm John is for her Falcon nine, Principal integration engineer and I will be bringing you coverage of the Space six launch for a radium next during today's Webcast.

Now, this is our fourth of eight plan watches for radium.

It's also our fourth already in flight in 2017.

We started in January with the radium one and we're wrapping up 2017 with a radium, for we're t minus 12 minutes 48 seconds.

Counting down as you just saw from the video tour we're launching from Historic Space Launch Complex for at Vandenberg Air Force Base, where I worked for several years while I was in the Air Force Slick.

For us, it's called is Space X's West Coast launch site.

On the launch pad, you can see the two stage Falcon nine vehicle.

It stands just over 70 meters tall.

That's totally than a 20 story building.

It's in the darkness just after sunset.

Now the first stage provides the initial force to get out of the majority of the Earth's atmosphere.

The first stage in the close ups is the stage that has the space sex logo on it.

For that first stage, this will be its second flight, the first having been on the Iridium to mission earlier this summer.

Now what you may have noticed in our camera views is the first date does not have landing legs for this flight.

Although griffins are installed, Space six does not plan to recover this first stage.

A landing sequence out in the Pacific Ocean will be performed, but there is no drone ship in position for recovery.

Space X will not be following the first stage during the Webcast, although you may hear call outs on the countdown that while we are following the second stage as it goes into orbit.

Also of note, you may notice the Inter stage looks slightly dark city from the last flight and it ISS.

There was no need after it was recovered to totally clean and repaint.

That inter stage.

Now on top of the first stage is the second stage that will take the satellite from the state separation altitude of just over 70 kilometers at the edge of space and accelerated up to the orbital speed of just over 7.5 kilometres per second, or about 17,500 miles per hour, 10 times faster than a bullet.

Finally, there in the view, you can see with the iridium next logo at the very top, the 17 foot diameter payload faring inside of which are 10 Iridium satellites.

And I'd finally the large white structure next to the racket.

It is our transporter Erector as a reminder.

Unlike the East Coast here on the West Coast, the transporter Erector.

We'll move away, starting at about T minus five minutes to a position 17 77.5 degrees away from the racket just before t zero t minus 10 minutes.

We're counting down launch again, planned at 27 minutes 34 seconds after the hour.

Currently on the Falcon nine, the good news is the Space X team is working no significant issues.

We began loading feel into the first stage on time.

A T minus 70 minutes.

Feel is now essentially loaded on the first stage.

We'll top it off with just a little bit from about T minus seven minutes to t minus six minutes.

And that'll finish the first age feel we are loading liquid oxygen onto both stages.

Stage one is about 80 some percent complete.

Stage two is a little more than half full.

That liquid oxygen loading will continue up until the last minutes of the countdown.

First stage completing at about T minus three minutes.

Second stage locks loading will complete about T minus two minutes.

You should hear those Countdown's over the countdown, that is, We listen to the last minutes.

Right now, The next major activity plan is in two minutes.

A T minus seven.

That will be the opening of the pre valves between the first stage propellant tanks and the nine Merlin one D engines at the bottom of the first stage that will allow liquid oxygen to bleed through.

The turbo pumps begin showing them down to prepare them for the ignition.

That it comes just a couple seconds before t zero on top of the Falcon.

Nine shown within again the set the payload.

Faring with the Iridium next logo On it are the turn of Iridium satellites.

The reading of team working.

No issues.

They have gone to internal power, and they are ready for launch today.

For the range were operating out of Vanderburgh, the head of the Western Range.

Everything looks good from the air Force.

Support is in place, ready for an on time launch.

And then finally, the weather.

The good news is we don't have to do anything about the weather.

The Air Force weather officer has given us a 0% probability of violating conditions up around two.

Jet stream looks like it's in control.

Ground level winds, as you can see, are very light.

We're hardly blowing any of the mist away from the rocket, the cold moisture condensing from the chill of liquid oxygen in the stages.

So it's seven minutes 54 seconds.

Everything is looking good now.

Today, Space X is launching 10 radium next satellites toe Leo at short for low earth orbit.

Now each of the 10 satellites has a mass of about 600 kilograms and it's got solar rays that are currently folded up alongside each satellite.

Once they're in space, the solar is will fully deploy.

And the radium next satellite had a wingspan of approximately nine meters in length.

No.

In order to correctly position the satellites into the right orbital plane, that means we have to launch right on time.

Today.

Our launch window is one second walk.

Now, if you hear the dreaded hold hold.

Hold on.

Account down.

That means we're gonna have to recycle and try again another day.

There is a backup opportunity tomorrow.

About six minutes later.

Finally, when the second stage gets into the final orbit later this evening will be at 625 kilometers altitude from there.

Will released the tenant Iridium satellites.

They will make the maneuvers to their final orbits.

Now, that event sequence will last 15 minutes.

We're gonna hope to bring that to you, using a camera on the second stage later on.

But for now, we've got Matt dish with some of the unique features of the Iridium system when we were envisioning a radium.

Next, a whole constellation of 66 new satellites going around the Earth to replace our network, we realized returning credible real estate.

This is this is really, really important real estate to be so close to the Earth, with the network all interconnected in space.

What if other sensors could be put on our satellites?

What if other things that really wanted to see the Earth as a complete entity could also be on the satellite with us?

We decided to put a payload about this big to monitor aircraft, and it operates completely independently of our communication system.

It doesn't use the same radio frequencies or anything but what it's doing.

Its listening for the transmissions of every aircraft in the world, all of whom are broadcast in a very specific frequency in a very specific language called adsb.

Their identity, their location there speed their position, their altitude.

And while ground towers typically pick up those receptions, we knew that we were so close to the earth, and with an interconnected satellite system, we could hear those transmissions and relay them in real time to an air traffic controller and that would allow airplanes to fly much more efficiently.

Point to point, they'd be ableto climb faster.

They'd be able to fly in places where there was no radar coverage today but fly justice safely and as efficiently as they do when they were in radar coverage.

Every one of our new satellites has one of these receivers on them.

In fact, they're processing billions of messages a day already from airplanes.

And when the full network is complete, that is gonna provide a 100% picture of the real time location of every airplane on the planet.

And it's exciting because we've created this whole new business that isn't even related to our core communication competency.

By using this hosted payload, as it's called, we also had the company that created this payload put a few other things in there, including the ability to monitor all ships in real time, and that's quite exciting.

Today we pick up large ships as they're traveling around the world.

They can be out of touch and out of reach.

And so, for the first time ever, there'll be 100% picture of every ship in the ocean, picking up the unique frequencies transmitted by every ship as its trying to send out its information toe nearby ships.

But we'll pick it up as we pass overhead and relay that to the agency's The Coast Guard's.

The maritime organizations that really want to know in real time, where every large ship is traveling the world for safety and security.

And that's exciting.

It's a whole new business that just rides along with our communication payload and really creates a whole new technical innovation, whole new business around her business that expands the power and potential of this unique global constellation.

Satellites T minus two minutes 40 seconds, Continuing to count down for a launch, Everything looks good.

While we're watching that video, the team has moved that strong back away from the Falcon nine.

We've done thrust vector control check.

It's on the upper stage engine.

We've done alignment of the guidance system.

We've completed feel loading on first and second stage, and we have just ended walks loading on stage one, So we're down to loading locks on stage two.

Then we'll go into the final countdown sequence, starting a T minus one minute now.

One note coming up in about 90 seconds.

If you see and hear a large venting off of the strong back that's normal will be draining liquid oxygen out of the structure alongside of the rocket.

And sometimes that will condense a lot of the moisture in the air at Vandenberg into a cloud.

But for that a radium is go.

The range has just announced they're green.

The weather is go.

So we're gonna listen in to the last minute and 45 of the countdown.

A Falcon nine with a radium.

Next.

Vehicles and self one vehicle gas clothes outside started Yes, is ready for launch.

Falcon nine's and started stage two tanks present for flight.

No, these go for launch.

T minus 30 seconds.

20 stage one tanks present replied.

15 10 nine, eight, seven, 65 four, three, two, one.

Lift off, Triano.

People s a minute.

10 in the flight.

We've just gone through throttle down and throttle.

Back up on the fact of nine first stage engines.

We've gone through Max Q on the first stage.

First stage continues to look good on the engines headed downrange away from Vandenberg Air Force base.

We're chilling in the EM back engine two minutes into flight, getting it ready for ignition.

Next major event, coming up in 30 seconds, is shut down of the nine first age engines, followed by stage separation and ignition of the second stage engine.

Shortly after that, we hope to get a view of Palin faring separation from the second stage.

If you go, we've had successful separation and ignition of the upper stage engine.

First words from propulsion.

Things look good on the upper stage engine and the second stage.

Next up, we should seafaring separation.

You hear the applause from the team gathered around Mission Control Center here in Hawthorne.

It's 5 30 in the evening.

Second shift is in there, watching the flight faring.

Separation looked very good, exposing the 10 Iridium next satellites to the vacuum of outer space.

We're 3.5 minutes plus in the flight.

Second stage performance continues to look excellent.

T plus four minutes into flight.

Falcon nine second stage continues to perform.

Nominally power on the engine looks good.

Avionics looks good.

Guidance lips were on track headed south away from California, eventually overflowing the south polar camp on her way off of Eastern Africa, where we'll eventually deploy Later in the Webcast, the 10 radium next satellites plus five minutes into flight.

You can see the camera views looking back on the nozzle of the em back D Merlin vacuum engine, Red hot, which is just what we expected.

This stage of flight, the engine is at full power.

Continuing to perform normally is, I like to say, and meanwhile, the second stage is on trajectory headed for its initial low earth parking orbit.

We'll talk a little bit more about that later on, but for now everything continues to look good.

T plus six minutes into flight.

Falcon nine, second stage carrying 10 A routine next satellites is currently west and south of the tip of Baja California.

I hope that everybody in Southern California had a great view of the launch this evening.

We've had clear skies, the rocket launching about half an hour after sunset.

Now, currently we're in burn one.

This takes us into the low earth parking orbit.

That's ah, temporary orbit that will be in for about half an orbit around the Earth before we relight the upper stage engine and that will move us with its second burn into the final orbit.

We'll be bringing you that second burn later on in the Webcast stage one entry started.

That's one integral entry.

Sit down, stage 1 7.5 minutes in the flight.

Falcon nine second stage two continues to perform.

Well, we're continuing on the desire trajectory headed south from Vandenberg Air Force Base, California heading into a an approximate polar orbit with the Iridium next satellites.

Now, as I mentioned, we're going to have to Burns were in the first burn right now.

This is the long burn.

Just over six men expected were beginning to throttle down power on the upper stage.