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USSF-87

© United Launch Alliance

All launches
United Launch Alliance

USSF-87

Success

Vulcan VC4S
T-minus to liftoff

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00

HOURS

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MINUTES

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SECONDS

Feb 12, 09:22:00 UTC
StatusSuccess
VehicleVulcan VC4S
OrbitGeostationary Orbit
PadSpace Launch Complex 41
Loading map…

Mission

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.

Quick facts

VehicleVulcan VC4S
OrbitGeostationary Orbit
PadSpace Launch Complex 41
SiteCape Canaveral SFS, FL, USA
WindowFeb 12, 08:30:00 UTC→Feb 12, 10:30:00 UTC

Vehicle

FamilyVulcan
Acquiring satellite view…
General trajectory
Space Launch Complex 41
Cape Canaveral SFS, FL, USA
Launching
East
93° · E
28.583, -80.583

Orbital elements (TLE)

2 element sets
Transfer orbit
Apogee37,006 km
Perigee490 km
Period660.6 min
Inclination15.50°

Launch heading 93° · E from USSF-87 PO.

Parking orbitUSSF-87 PO› conelow
1 70020U 26029A 26043.40133102 .00000000 00000-0 00000-0 0 9997
2 70020 28.5000 110.2356 0033160 314.0000 171.0000 15.27476000 06
Transfer orbitUSSF-87 GTOlow
1 70020U 26029A 26043.41313657 .00000000 00000-0 00000-0 0 9993
2 70020 15.5000 104.0356 7266504 179.0000 002.0000 02.17977200 05

Pre-launch TLEs from Dillon's Space Page. Estimated before flight — the real orbit is confirmed post-launch.

Scrub riskLOW
Go88%
Q

Q's read

Weather & scrubLOW risk
Weather Go88%LL2 Go95%Wind4 ktGusts4 ktCloud5%Temp80°F

Limiting rule: No flight through cumulus cloud with top at or above the freezing level.

5000% cloud cover in layer above freezing (14486 ft) — approximated