# Space Development Agency Launches Tranche 1 Satellites

The Space Development Agency (SDA) is preparing to launch the second batch of Tranche 1 Transport Layer satellites in early October 2026, with the goal of completing the full Tranche 1 Transport and Tracking Layer constellation within six to eight months. York Space Systems serves as the prime contractor for this critical space-based defense initiative. Full constellation deployment is expected by 2027, marking a significant enhancement in the U.S. military's space capabilities.

- This launch phase represents a key milestone in SDA's multi-tranche satellite constellation program, emphasizing ongoing procurement and deployment activities through 2027.
- Procurement professionals should note the involvement of York Space Systems as a prime contractor, indicating opportunities for subcontractors and suppliers in satellite manufacturing and launch support.
- Agencies and contractors engaged in space systems should prepare for continued contract awards and integration efforts related to the Transport and Tracking Layers.
- The Maryland region, including National Harbor, remains a focal point for SDA activities, which may influence regional contracting and partnership opportunities.

**Jurisdictions:** federal
**Industries:** Defense & Military
**Topics:** Physical Infrastructure
**Published:** September 15, 2026

### Government Entities
- Space Development Agency (SDA)

### Vendors
- York Space Systems (prime contractor)

### Sources
- [Second Tranche 1 Data Layer Satellite Launch Weeks Away; Full Tranche 1 Constellation Up In 2027 - Defense Daily](https://www.defensedaily.com/second-tranche-1-data-layer-satellite-launch-weeks-away-full-tranche-1-constellation-up-in-2027/space) - defensedaily.com