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SpaceX/Falcon 9 Block 5·Space Launch Complex 4E

Falcon 9 Block 5 | SDA Tranche 1 Transport Layer D

Orbit: PO·Type: Government/Top Secret·Agencies: Space Development Agency

Countdown to T-0

GMT Time
Spaceport
To Be Determined
Falcon 9 Block 5 | SDA Tranche 1 Transport Layer D mission image
Vehicle: Falcon 9 Block 5Credit: SpaceX · Wikimedia Commons

Tranche 1 Transport Layer D is one of six missions by the United States Space Force Space Development Agency (SDA) for the Proliferated Warfighter Space Architecture (PWSA) Tranche 1 Transport Layer constellation, which will provide assured, resilient, low-latency military data and connectivity worldwide to the full range of warfighter platforms from Low Earth Orbit satellites. The constellation will be interconnected with Optical Inter-Satellite Links (OISLs) which have significantly increased performance over existing radio frequency crosslinks. It is expected to operate over Ka band, have stereo coverage and be dynamically networked for simpler hand-offs, greater bandwidth and fault tolerance.

Target orbit
PO · Polar Orbit
Mission type
Government/Top Secret
Payload
SDA Tranche 1 Transport Layer D
Agencies
Space Development Agency
Mission Update

Adding launch

Target liftoff time (UTC)

00:00:00 UTC

Thursday, 31 December 2026

Instantaneous window

Planned T-0 liftoff

00:00:00 UTCWindow open
00:00:00 UTCPlanned ignition
00:00:00 UTCWindow close
Rocket family
Falcon
Height
70m
Diameter
3.7m
Payload to LEO
22,800kg
Liftoff thrust
7,607kN
Stages
2