Terran Orbital to build satellite buses for SDA Tranche 3 Tracking Layer

Los Angeles CA (SPX) Jan 01, 2026

Terran Orbital has been selected by Lockheed Martin to supply satellite bus platforms for the Space Development Agency’s Tranche 3 Tracking Layer within the Proliferated Warfighter Space Architecture.

Under this program, Lockheed Martin will deliver 18 space vehicles that provide missile warning, tracking, and defense functions for SDA’s Tranche 3 Tracking Layer. Terran Orbital will supply