Vulcan VC4S | USSF-87

USSF-87 will launch two identical Geosynchronous Space Situational Awareness Program (GSSAP) satellites GSSAP-7 and GSSAP-8 directly to a near-geosynchronous orbit approximately 36,000 km above the equator. Data from the GSSAP will uniquely contribute to timely and accurate orbital predictions, further enabling space flight safety including satellite collision avoidance.

Government/Top Secret · Geostationary Orbit (Direct-GEO)

No booster details available.

• Rocket Launch: Vulcan USSF-87 — United Launch Alliance
• Watch live: ULA to launch geosynchronous orbit warning spacecraft for U.S. Space Force — Spaceflight Now
• ULA Vulcan VC4S launches USSF-87 — NASASpaceflight

1. T−4.9SIgnition
2. T+1SLiftoff
3. T+47.2SSupersonic
4. T+1M2.5SMax-Q
5. T+1M37.2SSRB Separation
6. T+4M57.5SMECO
7. T+5M3.5SStage 2 Separation
8. T+5M13.5SSES-1
9. T+5M21.5SFairing Separation

• Launch success.

  Cosmic_Penguin · 2/12/2026 · source

• Liftoff!

  hitura-nobad · 2/12/2026 · source

• Official Webcast by United Launch Alliance has started

  LL2 · 2/12/2026 · source

• New T-0 09:22 UTC

  hitura-nobad · 2/12/2026 · source

• Updated launch weather, 95% GO.

  Cosmic_Penguin · 2/11/2026 · source

• Updated launch weather, 95% GO.

  Cosmic_Penguin · 2/10/2026 · source

• Updated launch window.

  Cosmic_Penguin · 2/9/2026 · source

• Added launch window.

  Cosmic_Penguin · 2/4/2026 · source

• Delayed to NET February 12.

  Cosmic_Penguin · 1/26/2026 · source

• Changed rocket configuration.

  Cosmic_Penguin · 1/7/2026 · source