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Space Domain Awareness

Also known as SDA, space situational awareness

The sensing, tracking and characterisation capability used to maintain custody of objects and activity in orbit and to attribute events in the space domain.

Verified connections
3
Evidence citations
6

Executive overview

Space Domain Awareness is the sensing, tracking and characterisation capability the Space Force uses to maintain custody of objects in orbit and attribute events in the space domain. Recent atmospheric entry events and an impending lunar impact have both been cited as evidence that current coverage is being stretched beyond its designed volume.

Why it matters

Coverage gaps are procurement signals. Each event that exposes a sensing limitation strengthens the case for new sensors, new processing and new test infrastructure, which is where the associated contract vehicles are already being positioned.

Editorially approved Aug 5, 2026 · version 1

Verified relationships

Evidence timeline

  1. Aug 5, 2026 · Node created

    Commissioned in Stage G2 first-node cohort

  2. Aug 5, 2026 · Connection formed

    United States Space Force — Space Force operates the sensing and custody mission for the space domain.

  3. Aug 5, 2026 · Connection formed

    Cislunar Domain Awareness — Cislunar domain awareness extends space domain awareness sensing beyond GEO.

  4. Aug 5, 2026 · Connection formed

    NITE-STAR — Range and test engineering scope covers space domain awareness test activity.

  5. Aug 5, 2026 · Evidence added

    United States Space Force — Atmospheric Entry Events Highlight Strategic Space Domain Awareness Needs

    Source

  6. Aug 5, 2026 · Evidence added

    United States Space Force — Impending Falcon 9 Lunar Impact Drives Cislunar Domain Awareness Push

    Source

  7. Aug 5, 2026 · Evidence added

    Cislunar Domain Awareness — Impending Falcon 9 Lunar Impact Drives Cislunar Domain Awareness Push

    Source

  8. Aug 5, 2026 · Evidence added

    Cislunar Domain Awareness — Atmospheric Entry Events Highlight Strategic Space Domain Awareness Needs

    Source

  9. Aug 5, 2026 · Evidence added

    NITE-STAR — Space Force Establishes $981M Vehicle to Rapidly Procure Training Simulators

    Source

  10. Aug 5, 2026 · Evidence added

    NITE-STAR — Space Force Names 15 Vendors for $981M Space Test and Training Architecture

    Source

  11. Aug 5, 2026 · Summary updated

    Editorial overview approved for commissioning

  12. Aug 5, 2026 · Promoted to public

    Promoted after class thresholds re-verified at publication