Subscribe with SteadyT1TL 1, ..., 42 [York] (Tranche 1 Transport Layer, Praetorian SDA-601, ..., 642)
T1TL [York Space Systems]
The Transport Layer is an experimental military satellite constellation developed by the SDA (Space Development Agency), which will serve as the backbone of the National Defense Space Architecture (NDSA), connecting the various satellites to each other and to the war fighter. The Transport Layer will provide the key space network component to the Department of Defenses Joint All-Domain Command and Control.
| Nation: | USA |
|---|---|
| Type / Application: | Communications, laser |
| Operator: | SDA |
| Contractors: | York Space Systems |
| Equipment: | |
| Configuration: | York LX-class bus |
| Propulsion: | ? |
| Power: | Solar arrays, batteries |
| Lifetime: | |
| Mass: | |
| Orbit: | 950 km × 950 km, 80-89.5° |
| Satellite | COSPAR | Date | LS | Launch Vehicle | Remarks | |
|---|---|---|---|---|---|---|
| T1TL-B 1 (Praetorian SDA-601) | 2025-203W | 10.09.2025 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-B 1 , ..., 21 | |
| T1TL-B 2 (Praetorian SDA-602) | 2025-203A | 10.09.2025 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-B 1 , ..., 21 | |
| T1TL-B 3 (Praetorian SDA-603) | 2025-203B | 10.09.2025 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-B 1 , ..., 21 | |
| T1TL-B 4 (Praetorian SDA-604) | 2025-203C | 10.09.2025 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-B 1 , ..., 21 | |
| T1TL-B 5 (Praetorian SDA-605) | 2025-203D | 10.09.2025 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-B 1 , ..., 21 | |
| T1TL-B 6 (Praetorian SDA-606) | 2025-203E | 10.09.2025 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-B 1 , ..., 21 | |
| T1TL-B 7 (Praetorian SDA-607) | 2025-203F | 10.09.2025 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-B 1 , ..., 21 | |
| T1TL-B 8 (Praetorian SDA-608) | 2025-203G | 10.09.2025 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-B 1 , ..., 21 | |
| T1TL-B 9 (Praetorian SDA-609) | 2025-203H | 10.09.2025 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-B 1 , ..., 21 | |
| T1TL-B 10 (Praetorian SDA-610) | 2025-203J | 10.09.2025 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-B 1 , ..., 21 | |
| T1TL-B 11 (Praetorian SDA-611) | 2025-203K | 10.09.2025 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-B 1 , ..., 21 | |
| T1TL-B 12 (Praetorian SDA-612) | 2025-203L | 10.09.2025 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-B 1 , ..., 21 | |
| T1TL-B 13 (Praetorian SDA-613) | 2025-203M | 10.09.2025 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-B 1 , ..., 21 | |
| T1TL-B 14 (Praetorian SDA-614) | 2025-203N | 10.09.2025 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-B 1 , ..., 21 | |
| T1TL-B 15 (Praetorian SDA-615) | 2025-203P | 10.09.2025 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-B 1 , ..., 21 | |
| T1TL-B 16 (Praetorian SDA-616) | 2025-203Q | 10.09.2025 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-B 1 , ..., 21 | |
| T1TL-B 17 (Praetorian SDA-617) | 2025-203R | 10.09.2025 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-B 1 , ..., 21 | |
| T1TL-B 18 (Praetorian SDA-618) | 2025-203S | 10.09.2025 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-B 1 , ..., 21 | |
| T1TL-B 19 (Praetorian SDA-619) | 2025-203T | 10.09.2025 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-B 1 , ..., 21 | |
| T1TL-B 20 (Praetorian SDA-620) | 2025-203U | 10.09.2025 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-B 1 , ..., 21 | |
| T1TL-B 21 (Praetorian SDA-621) | 2025-203V | 10.09.2025 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-B 1 , ..., 21 | |
| T1TL-E 1 (Praetorian SDA-501) | 2026-163A | 16.07.2026 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-E 1 , ..., 21 | |
| T1TL-E 2 (Praetorian SDA-502) | 2026-163B | 16.07.2026 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-E 1 , ..., 21 | |
| T1TL-E 3 (Praetorian SDA-503) | 2026-163C | 16.07.2026 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-E 1 , ..., 21 | |
| T1TL-E 4 (Praetorian SDA-504) | 2026-163D | 16.07.2026 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-E 1 , ..., 21 | |
| T1TL-E 5 (Praetorian SDA-505) | 2026-163E | 16.07.2026 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-E 1 , ..., 21 | |
| T1TL-E 6 (Praetorian SDA-506) | 2026-163F | 16.07.2026 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-E 1 , ..., 21 | |
| T1TL-E 7 (Praetorian SDA-507) | 2026-163G | 16.07.2026 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-E 1 , ..., 21 | |
| T1TL-E 8 (Praetorian SDA-508) | 2026-163H | 16.07.2026 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-E 1 , ..., 21 | |
| T1TL-E 9 (Praetorian SDA-509) | 2026-163J | 16.07.2026 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-E 1 , ..., 21 | |
| T1TL-E 10 (Praetorian SDA-510) | 2026-163K | 16.07.2026 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-E 1 , ..., 21 | |
| T1TL-E 11 (Praetorian SDA-511) | 2026-163L | 16.07.2026 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-E 1 , ..., 21 | |
| T1TL-E 12 (Praetorian SDA-512) | 2026-163M | 16.07.2026 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-E 1 , ..., 21 | |
| T1TL-E 13 (Praetorian SDA-513) | 2026-163N | 16.07.2026 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-E 1 , ..., 21 | |
| T1TL-E 14 (Praetorian SDA-514) | 2026-163P | 16.07.2026 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-E 1 , ..., 21 | |
| T1TL-E 15 (Praetorian SDA-515) | 2026-163Q | 16.07.2026 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-E 1 , ..., 21 | |
| T1TL-E 16 (Praetorian SDA-516) | 2026-163R | 16.07.2026 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-E 1 , ..., 21 | |
| T1TL-E 17 (Praetorian SDA-517) | 2026-163S | 16.07.2026 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-E 1 , ..., 21 | |
| T1TL-E 18 (Praetorian SDA-518) | 2026-163T | 16.07.2026 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-E 1 , ..., 21 | |
| T1TL-E 19 (Praetorian SDA-519) | 2026-163U | 16.07.2026 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-E 1 , ..., 21 | |
| T1TL-E 20 (Praetorian SDA-520) | 2026-163V | 16.07.2026 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-E 1 , ..., 21 | |
| T1TL-E 21 (Praetorian SDA-521) | 2026-163W | 16.07.2026 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with T1TL-E 1 , ..., 21 |
Launch Sites:
- Va = Vandenberg Space Force Base, California, USA
References:
Further NDSA missions:
Tracking Layer
Tracking Layer
- T0TR 1, ..., 4 (BB) [SpaceX]
- T0TR 5, ..., 8 (Raptor) [L3Harris]
- T1TR 1, ..., 14 [NG]
- T1TR 1, ..., 14 [L3Harris]
- T2TR 1, ..., 18 [NG]
- T2TR 1, ..., 18 [L3Harris]
- T2TR 1, ..., 18 [SNC]
- T3TR 1, ..., 18 [NG]
- T3TR 1, ..., 18 [L3Harris]
- T3TR 1, ..., 18 [LM]
- T3TR 1, ..., 18 [RocketLab]
- T0TL A-Class 1, ..., 6 (Checkmate) [York]
- T0TL A-Class 7, ..., 13 (Wildfire) [LM]
- T0TL B-Class 1, ..., 4 (Checkmate) [York]
- T0TL B-Class 5, ..., 7 (Wildfire) [LM]
- T1TL 1, ..., 42 [LM]
- T1TL 1, ..., 42 [NG]
- T1TL 1, ..., 42 [York] (Praetorian)
- T2TL-Alpha 1, ..., 62 [York]
- T2TL-Alpha 1, ..., 38 [NG]
- T2TL-Beta 1, ..., 36 [LM]
- T2TL-Beta 1, ..., 36 [NG]
- T2TL-Beta 1, ..., 18 [RL]
- T2TL-Gamma 1, ..., 10 [York]
- T2TL-Gamma 1, ..., 10 [?]
- T1DES 1, ..., 12 (Dragoon) [York]
