Tranche 1 Transport Layer – Spaceflight Now

April 5, 2026

Breaking News

[ April 3, 2026 ] ULA’s Atlas 5 rocket launches its heaviest payload ever with fifth Amazon Leo mission Atlas 5
[ April 2, 2026 ] Artemis 2 crew blasts off on historic moon mission Artemis
[ April 1, 2026 ] Live coverage: NASA to launch Artemis 2, its first Moon-bound mission with astronauts since 1972 Artemis
[ March 30, 2026 ] Falcon 9 booster launches for record 34th time on Starlink delivery mission Falcon 9
[ March 30, 2026 ] SpaceX launches 119 payloads on smallsat rideshare mission from California Falcon 9

New U.S. military satellite constellation takes shape with first launch from Vandenberg SFB

September 12, 2025 Will Robinson-Smith

The Space Development Agency’s Proliferated Warfighter Space Architecture constellation is expected to deliver global coverage beginning in 2027. Launch from Vandenberg Space Force Base occurred at 7:12 a.m. PDT (10:12 a.m. EDT / 1412 UTC).

Launch preview: Space Development Agency, SpaceX to launch next-gen national security satellites

September 10, 2025 Will Robinson-Smith

The 21 satellites from York Space Systems are the first in the SDA’s Tranche 1 Transport Layer satellite constellation. SpaceX launched from pad 4 East at Vandenberg Space Force Base at 7:12 a.m. PDT (10:12 a.m. EDT / 1412 UTC).