USSF-481
Falcon 9 Block 5. Space Launch Complex 4E, Vandenberg SFB, CA, USA.
- B1081: Autonomous Spaceport Drone Ship, Of Course I Still Love You, planned
- Your Time
- UTC
- At the Pad
Scheduled
Go for Launch
Webcast
Liftoff
Outcome
USSF-481
SpaceX
Mission
Government/Top Secret, Polar Orbit
A classified mission for the United States Space Force. It is possibly a batch of classified LEO satellites based on SpaceX’s Starshield satellite bus, based on locations of ascent rocket stage drop zones being fits with previous SDA Transport Layer launches.
Viewing
- Liftoff100 km
- Ascent180° S
Unlikely
Jellyfish at T-0
- Likely18:51–19:30
Sun 19° above the horizon at T-0.
Countdown Sequence
Planned offsets from T-0; confirmations link to their sources
- T−00:38:00
GO for Prop Load
Launch director verifies go for propellant load
Planned
- T−00:35:00
Prop Load
Start of propelland loading
Planned
- T−00:35:00
Stage 1 LOX Load
Start of liquid oxygen loading in the first stage
Planned
- T−00:16:00
Stage 2 LOX Load
Start of liquid oxygen loading in the second stage
Planned
- T−00:07:00
Engine Chill
Start of engine chilling
Planned
- T−00:01:00
Startup
The onboard computer takes control over the countdown and runs last checks
Planned
- T−00:01:00
Tank Press
Fuel tanks are pressurized to flight levels
Planned
- T−00:00:45
GO for Launch
Launch director verifies go for launch
Planned
- T−00:00:03
Ignition
Start of the engine ignition sequence
Planned
- T+00:00:00
Liftoff
First upwards movement of the rocket
Planned
- T+00:01:07
Max-Q
Maximum dynamic pressure
Planned
- T+00:02:26
MECO
Cut-off of the main engine
Planned
- T+00:02:29
Stage 2 Separation
Separation of the second stage from the first
Planned
- T+00:02:36
SES-1
First start of the second engine
Planned
- T+00:03:01
Fairing Separation
Separation of the payload fairing
Planned
- T+00:06:01
Entry Burn Startup
Start of the atmospheric entry burn
Planned
- T+00:06:24
Entry Burn Shutdown
End of the atmospheric entry burn
Planned
- T+00:08:00
Stage 1 Landing Burn
Start of the first stage landing burn
Planned
- T+00:08:09
Stage 1 Landing
Landing of the first stage
Planned
Launch Outcome
Awaiting a Reported Outcome
Change Log
Detected changes and source updates
GO for launch.
StatusTBC → Go
Added launch per marine navigation warnings.