Comstar 3

USA

Also called: Comstar 1C

Launch data:

Designation10975 / 78068A
Launch date29 Jun 1978
Launch siteCC, LC-36B
Launch vehicleAtlas-SLV3D Centaur-D1AR (AC-41)
MissionCommunications
Geostationary orbit 87°W

Specifications

Prime contractor Hughes
Platform HS-351
Mass at launch 1516 kg
Mass in orbit 911 kg
Dimension 2.38 m diameter x 6.34 m height
Stabilization Spin stabilized (56 rpm)
DC power BOL:570 W
Design lifetime 10 years

Equipped with two Ka-band beacons for propagation research (19 and 28.6 GHz).

End of life

Out of service yes


C-band


Main transponders 24
Backup transponders  
Power Horizontal: 5 W (TWTA)
Vertical: 5.5 W (TWTA)
Bandwidth 36 MHz
Coverage CONUS
EIRP max 33 dBW
Polarization linear H/V
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