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SpaceX / MISSION BRIEFING
SDA Tranche 1 Transport Layer D
Falcon 9 Block 5 · Government/Top Secret
TBD
LAUNCH TIMETBDTiming is subject to mission updates
Mission image · SpaceX
Mission overview
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.
- Mission
- SDA Tranche 1 Transport Layer D
- Mission type
- Government/Top Secret
- Provider
- SpaceX
- Target orbit
- Polar Orbit
Timeline
Scheduled event sequence from Launch Library 2. These are planned milestones, not confirmed telemetry. Events remain unconfirmed until a verified source reports them.
A verified event timeline has not been published for this mission.
Mission intelligence
Explore connectionsMission activity
Listening for verified changes
Activity appears when ORBITAL observes a change between source records. No historical events are invented.
Read source update
Schedule history
No changes recorded
Changes are recorded when ORBITAL retrieves data. The detection time may differ from the time the source changed its information.
Rocket
Falcon 9 Block 5SpaceX · United StatesFalcon 9 is a two-stage rocket designed and manufactured by SpaceX for the reliable and safe transport of satellites and the Dragon spacecraft into orbit. The Block 5 variant is the fifth major interval aimed at improving upon the ability for rapid reusability.
Payload
SDA Tranche 1 Transport Layer D
Payload details are described in the mission overview. No independently structured payload manifest or payload mass has been provided by the source.
Target orbit
SCHEMATIC · NOT A FLIGHT TRAJECTORY
- Orbit
- Polar Orbit
- Classification
- PO
Launch site
Space Launch Complex 4E
Vandenberg SFB, CA, USA
- Latitude
- 34.63200°
- Longitude
- -120.61100°
- Country
- United States
- Time zone
- America/Los_Angeles
Live & mission coverage
No verified official livestream has been announced. Check mission sources for coverage updates.
Sources
Source links and confidence are preserved with each mission. Official updates take priority when verified.
Launch Library 2high · P80
ll.thespacedevs.com · Updated Aug 27, 2026 16:00 UTCMission referencemedium · P60
spacenews.com · Updated Aug 27, 2026 16:00 UTCMission photographs are provided by the original sources. Their rights remain with their creators; consult the source before reusing an image.