Recorded mission
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United Launch Alliance
Vulcan VC4S | USSF-87
Recorded mission coverage
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Mission brief
The mission at a glance.
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.
Open the full mission →Published flight sequence
Know what comes next.
Planned timings relative to the target. These steps do not indicate live progress.
- T−00:00:4.9
Ignition
- T+00:00:01
Liftoff
- T+00:00:47.2
Supersonic
- T+00:01:2.5
Max-Q
- T+00:01:37.2
SRB Separation
- T+00:04:57.5
MECO
See all 9 published steps ↓
- T+00:05:3.5
Stage 2 Separation
- T+00:05:13.5
SES-1
- T+00:05:21.5
Fairing Separation