SDA Tranche 1 Transport Layer A
Tranche 1 Transport Layer A 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.
This launch carries 21 satellites manufactured by Northrop Grumman.
Related launches
| No. | Mission | Date | Rocket | Status |
|---|---|---|---|---|
| 01 | NROL-97 | 02 Oct 2026 | Falcon Heavy | Go |
| 02 | Starlink Group 15-25 | 10 Oct 2026 | Falcon 9 Block 5 | Go |
| 03 | Dragon CRS-2 SpX-35 | 13 Oct 2026 | Falcon 9 Block 5 | TBD |
| 04 | Bandwagon 5 (Dedicated Mid-Inclination Rideshare) | 31 Oct 2026 | Falcon 9 Block 5 | TBD |
| 05 | Inmarsat-7 F1 (GX-7) | 31 Dec 2026 | Falcon 9 Block 5 | TBD |
| 06 | Crew-17 | 31 Dec 2028 | Falcon 9 Block 5 | TBD |
| 07 | Al Yah 5 | 31 Dec 2028 | Falcon 9 Block 5 | TBD |
| 08 | Transporter 18 (Dedicated SSO Rideshare) | 01 Oct 2026 | Falcon 9 Block 5 | Success |
| 09 | Crew-13 | 01 Oct 2026 | Falcon 9 Block 5 | Success |
| 10 | Starlink Group 31-1 (Starship Flight 14) | 28 Sept 2026 | Starship V3 | Success |