Space Development Agency Selects Tranche 3 Tracking Contractors
On Dec. 19, 2025, the Space Development Agency selected four contractor teams—Lockheed Martin, Rocket Lab USA, Northrop Grumman and L3Harris—to build and operate 72 Tranche 3 Tracking Layer satellites under agreements worth about $3.5 billion. The satellites, each carrying infrared payloads and optical/Ka-band communications, target launches in fiscal year 2029 to improve global missile warning, tracking and fire-control quality interoperable with the Transport Layer.
Key Points
- 1Selects four contractors to deliver 72 Tranche 3 Tracking Layer satellites valued about $3.5 billion.
- 2Integrates Tracking Layer with Transport Layer to provide near-continuous global missile warning and fire-control tracks.
- 3Enables defense operators to receive low-latency, precision infrared data for missile-defense intercept decision-making.
Scoring Rationale
Official, large-scale contract awards drive high impact; limited methodological novelty for AI/ML practitioners reduces top-tier breakthrough rating.
Sources
Public references used for this report.
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