Tranche 1 Transport Layer – Spaceflight Now

September 16, 2026

Breaking News

[ September 15, 2026 ] Live coverage: SpaceX to launch national security payload for the U.S. Space Force on Falcon 9 rocket from Vandenberg Falcon 9
[ September 15, 2026 ] Avio launches pair of climate monitoring European spacecraft to study plants, oceans and atmospheric changes News
[ September 13, 2026 ] SpaceX launches 700th Falcon rocket, carries final 3 O3b mPOWER satellites to orbit for SES Falcon 9
[ September 9, 2026 ] SpaceX launches classified payload for the U.S. Space Force Falcon 9
[ September 5, 2026 ] SpaceX launches 80th Starlink mission of 2026 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).