Here’s a look ahead at the remaining countdown milestones and the sequence of events during the Falcon 9’s climb to orbit:
Hour:Minute:Second – Event
00:10 – Falcon 9 begins engine chill prior to launch
00:07 – Dragon to internal power
00:02 – Range Control Officer (USAF) verifies range is go for launch
00:01:30 – SpaceX Launch Director verifies go for launch
00:01 – Command flight computer to begin final prelaunch checks
00:01 – Pressurize propellant tanks
00:00:03 – Engine controller commands engine ignition sequence to start
00:00:00 – Falcon 9 liftoff
00:01:11 – Vehicle goes supersonic
00:02:30 – 1st stage main engine cutoff (MECO)
00:02:34 – 1st and 2nd stages separate
00:02:41 – 2nd stage engine starts
00:10 – 2nd stage engine cutoff (SECO)
00:10:30 – Dragon separates from 2nd stage
00:12 – Dragon’s solar arrays deploy
02:20 – Dragon’s Guidance, Navigation and Control bay door opens