GPS · Navigation
NAVSTAR 4 (OPS 5114)
NonoperationalNavigationMEO
Broadcasts precise timing/positioning signals for global navigation (GNSS).
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Launch
- Launch date
- December 11, 1978 at 03:59 AM UTC
- Launch site
- Vandenberg SFB, USA
- Launched by
- Atlas F/SVS →
- Operator
- United States Air Force
- Mission
- Navstar 4
- Launch record
- View full launch →
Orbit
- Orbit regime
- MEO
- Apoapsis
- 21,278 km
- Periapsis
- 20,485 km
- Inclination
- 63.7°
- Orbital period
- 746.52 min
Spacecraft
- Operator
- U.S. Space Force
- Launch mass
- 2,000 kg
Identity
- COSPAR (Int'l)
- 1978-112A
- NORAD catalog №
- 11141
- Object type
- Payload
- Owner / operator
United States- Constellation
- GPS
- Radar cross-section
- 0.4658 m²
- Status
- Nonoperational
End of mission
- Fate
- No longer operational — remains in orbit as inactive.
- Final status
- Nonoperational
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