SDA Tranche 1 Tracking Layer D
Falcon 9 Block 5. Space Launch Complex 4E, Vandenberg SFB, CA, USA.
Scheduled
Go for Launch
Webcast
Liftoff
Outcome
SDA Tranche 1 Tracking Layer D
SpaceX
Vehicle and Propellant
Falcon 9 Block 5
Waiting for Clock
Estimated loading progress from the countdown. Uses this flight’s timeline where available, with nominal Block 5 timings for missing endpoints. Actual fill rates vary; these percentages are not measured telemetry.
- Stage 2 · Liquid Oxygen
- —
- Stage 2 · RP-1 Kerosene
- —
- Stage 1 · Liquid Oxygen
- —
- Stage 1 · RP-1 Kerosene
- —
T-00:16:00 · T-00:02:00 · Nominal
T-00:35:00 · T-00:20:00 · Nominal
T-00:35:00 · T-00:03:00 · Nominal
T-00:35:00 · T-00:06:00 · Nominal
Engines From Below
Mission
Government/Top Secret, Polar Orbit
Tranche 1 Tracking Layer D is one of five missions by the United States Space Force Space Development Agency (SDA) for the Proliferated Warfighter Space Architecture (PWSA) Tranche 1 Tracking Layer constellation, which will provide global indications, warning, tracking, and targeting of advanced missile threats, including hypersonic missile systems.
Viewing
- Liftoff100 km
- Ascent180° S
Change Log
Detected changes and source updates
Launch vehicle swap with SDA Tranche 1 Tracking Layer E.
PadMoved from Space Launch Complex 3E to Space Launch Complex 4E
PrecisionTiming now known to the quarter
NET 2026.
Adding launch