Overview
- A SpaceX Falcon 9 on July 16 launched 21 York Space Systems satellites for SDA’s Tranche 1 Transport Layer, bringing the on‑orbit total to 63 of the planned 126 Transport satellites.
- SDA paused launches earlier this year after detecting software faults, thermal‑modeling errors, and electric‑propulsion problems on the first 42 satellites and has required hardware fixes plus extended vendor checkouts.
- The constellation’s defining optical intersatellite mesh has not yet been demonstrated in orbit, and SDA plans to commission laser links within orbital planes before attempting cross‑plane connections.
- The agency has shifted from a fixed monthly cadence to a readiness‑based launch model that will launch ‘whoever is ready,’ with York, Lockheed Martin and Northrop Grumman supplying remaining Tranche 1 spacecraft.
- If the mesh is activated in the coming months, SDA says the Transport Layer will speed sensor‑to‑shooter data for concepts like Golden Dome and will be operated from Space Operations Centers at Grand Forks and Redstone Arsenal.