Update: First stage complete, main engine cutoff good, fairing separation good. Second engine ignition and cutoff successful, and GRACE-FO deployment complete (we won’t know if they’re in a good orbit until NASA confirms). Second burn and Iridium orbit good…. All satellites deployed, making that a successful mission!
Today’s the day for SpaceX’s launch of Iridium’s NEXT communications satellites and a pair of twin birds from NASA that will monitor the fresh water on the surface of the Earth. You can watch the launch right here:
Liftoff is scheduled for 12:47 PM Pacific Time, so SpaceX’s live stream should fire up about 15 minutes ahead of that; NASA will also have its own updates, since it has skin in the game.
This is an unusual launch — the rocket will be making some complicated maneuvers 300 miles up to make sure NASA’s satellites are deployed correctly, then it travels the rest of the way to the targeted orbit for the communication satellites.
A few minutes after liftoff, the Falcon 9 first stage (incidentally, the one that launched the lost Zuma satellite in January) will detach and burn up. This will be its last mission — it’s not one of the “Block 5” rockets with all the durability improvements, so it would take a lot of money and time to fly again, and the risk of failure would grow considerably every time. So this its swan song. Rocket, we salute you.
The fairing, however, which covers the payload, may be recovered after ejection by Mr Steven, a boat with a huge net on top.