Sierra Space Hits Milestone for SDA Tranche 2 Satellites

Critical Design Review Completed Towards Missile Tracking System

Oct 06, 2025

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The Critical Design Review (CDR) for the Space Development Agency’s (SDA) Tranche 2 Tracking Layer (T2TRK) has been completed by Sierra Space. The technical readiness milestone clears the way for production of the advanced missile tracking satellites for the Proliferated Warfighter Space Architecture (PWSA) to begin.

“Our successful completion of CDR dem…

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