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Navstar 4

retired

Positioning Navigation TimingMEOCOSPAR 1978-112ALaunched 12/11/1978

Mission & Launch

Launch Mission: GPS 4
Launch Vehicle: Atlas F
Launch Date: 12/11/1978
Last Contact: 10/14/1989

Orbit & Mass

Orbit Class: MEO
Altitude: 20,182 km
Inclination: 63.28 deg
Orbit Plane: 2
Dry Mass: 409 kg
Total Mass: 775 kg

Payload Classification

Mission Type: Positioning Navigation Timing
Payload Category: NAV
Payload Class: D

Organizations

Operator: U.S. Air Force
Manufacturer: Boeing

Constellation

Name: GPS
Active Satellites: 35
Planned Satellites: 24

Registry

COSPAR ID: 1978-112A
UN Registration: ST/SG/SER.E/021