ULA
/
USSF-87 (GSSAP 7 & 8)
Liftoff Time
No Earlier Than 3rd Quarter, 2025
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Mission Details
GSSAP 7 & 8 (USSF-87)
Geosynchronous Space Situational Awareness Program (GSSAP) satellites are a space-based capability operating in the near-geosynchronous orbit regime supporting U.S. Space Command space surveillance operations as a dedicated Space Surveillance Network (SSN) sensor.
Manufacturer: Northrop Grumman
Operator: United States Space Force
Geostationary Earth Orbit
2 Payloads
Rocket
Planned
Vulcan VC4S 
Agency
ULARocket
Diameter: 5.4m
Height: 61.6m
Payload to Orbit
LEO: 24,600 kg
GTO: 11,693 kg
Liftoff Thrust
13,006 Kilonewtons
Fairing
Diameter: 5.4m
Height: 15.5m
Stages
2
Strap-ons
4