Sierra Space completes Plane 1 of SDA Tranche 2 — nine satellite structures delivered three months early
Sierra Space has finished the first nine satellite structures — Plane 1 of an 18‑spacecraft contract — for the Space Development Agency's Tranche 2 Tracking Layer, completing the hardware three months ahead of schedule. The milestone advances delivery of space‑based missile and target‑tracking capability for the Proliferated Warfighter architecture.