Satellite UFO-8 (USA 138, UHF F/O F8) "UHF Follow-On" of US Navy

Name of Satellite, Alternate Names UFO-8 (USA 138, UHF F/O F8) "UHF Follow-On"
Country of Operator/Owner USA
Operator/Owner US Navy
Users Military
Purpose Communications
Class of Orbit GEO
Type of Orbit
Longitude of GEO (degrees) 172.28
Perigee (km) 35772
Apogee (km) 35794
Eccentricity 0.000260954143240102
Inclination (degrees) 5.24
Period (minutes) 1435.94
Launch Mass (kg.) 3206
Dry Mass (kg.) 1545
Power (watts) 3,800 (EOL)
Date of Launch 16-03-1998
Expected Lifetime 4 yrs.
Contractor Boeing Satellite Systems
Country of Contractor USA
Launch Site Cape Canaveral
Launch Vehicle Atlas 2
COSPAR Number 1998-016A
NORAD Number 25258
Comments Ultra-High Frequency (UHF) communications and Super-High Frequency (SHF) antijam command and broadcast capabilities through four pairs of geosynchronous satellites and one spare; tactical application.


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