Northrop Grumman delivers first 21 satellites for SDA's Tranche 1 Transport Layer
Northrop Grumman delivered the first 21 of 150 planned SDA Tranche 1 Transport Layer satellites to Vandenberg Space Force Base.
what happened
Northrop Grumman said it delivered 21 satellites to Vandenberg Space Force Base on September 28 for the Space Development Agency's Proliferated Warfighter Space Architecture (PWSA) Tranche 1 Transport Layer, the first of a planned 150 Northrop Grumman-built satellites for the program, per the company's press release. The satellites will provide communications and data transport for the PWSA's Tracking Layer; the company said several dozen more of its PWSA satellites are scheduled to launch over the following six months, per Defense Daily.
why it matters
PWSA's Transport Layer is the backbone the Space Development Agency is buying from multiple commercial primes (Northrop Grumman, York Space Systems) to move missile-warning and warfighter data between satellites; steady delivery on this batch keeps Northrop Grumman's production line on the pace SDA needs for the network's next launch campaigns.
for who
Space Development Agency suppliers and PWSA-adjacent satellite manufacturers
signal-to-noise
quick facts
- Companies
- Northrop Grumman
- Category
- constellation
- Impact
- notable
- SNR
- 5 / 5
- Event date
- 2026-09-28
- Published
- 2026-09-28 23:46 UTC