SDA Seeks Proposals for Tranche 3 Tracking Layer (T3TRK) of the Proliferated Warfighter Space Architecture (PWSA)

Posted On: April 7, 2025

Responses Due: May 22, 2025

SDA seeks industry proposals for the Tranche 3 Tracking Layer (T3TRK) of the Proliferated Warfighter Space Architecture (PWSA). This Other Transaction Authority (OT) solicitation for T3TRK will accelerate the capability to provide global, persistent indications, detection, warning, tracking, and identification of conventional and advanced missile threats, including hypersonic missile systems.

The T3TRK Layer expands on Tranche 2 (T2) and Tranche 1 (T1) Tracking Layer capabilities with targeted technology enhancements, expanded coverage, increased integration, established calibration processes, and greater production efficiencies. Each Tracking Layer space vehicle (SV) and communications systems will be interoperable with all PWSA SVs (e.g. Transport Layer) and will operate in an integrated fashion through a common ground system. The T3TRK Layer, when integrated with the PWSA Transport Layer, will provide low-latency data to theater to ensure kill chain closure against stressing adversary weapon systems. 

SDA plans to purchase and deploy approximately 54 – and potentially more – T3TRK SVs with infrared sensors in six orbital planes using one or more vendors. SDA may also acquire additional satellites and sensor payloads under this OT authority agreement to inform requirements and constellation design. The first orbital plane of T3TRK SVs is expected to launch in spring 2029 

View the full solicitation, additional details, and submission instructions at the link. Industry proposals due by May 22, 2025, 12:00 pm EDT.