The Falcon 9 is flying right on target, and its second-stage power and telemetry are performing as expected. The next major milestone will be second-stage engine cutoff.
Main engine cutoff and first stage separation are complete. The single Merlin vacuum engine on the Falcon 9’s second stage has taken over the job of delivering the Dragon spacecraft to orbit.
The first-stage engines ignite seconds before liftoff, and a hold-before-release system quickly verifies all engines are working at top performance before releasing the rocket to fly.
The Eastern Range is “go” for launch at 4:47 a.m.
LOX topping has ended and stage 1 tanks have been raised to flight pressure.
The strongback has been retracted away from the rocket.
The Falcon 9 rocket is being switched from ground-based to internal power. Six minutes until launch.
At launch time, the International Space Station will be flying 261 miles above the middle of the Indian Ocean.
The terminal count is under way with 10 minutes left in the countdown.
Launch Director Brian Childers and Launch Conductor Ricky Lim have given the team the go-ahead to begin the terminal count at 4:37 a.m., 10 minutes prior to launch. At that point, the Falcon 9 and Dragon autosequences will carry out all rocket and spacecraft commands automatically.