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Satcom C1


Designation 20945 / 90100A
Launch date 20 Nov 1990
Country of origin United States
Mission Telecommunications
Geostationary orbit see below
Launch vehicle Ariane V40


Begin End Position
L: 20 Nov 1990 Oct 2000 137°W
Nov 2000 Apr 2001 141.5°W
Jun 2001 Jun 2002 79°W
Sep 2002 Jul 2004 37.5°W
Jul 2004 Apr 2005 37.5°W, inclined

End of life

Out of service late Apr 2005
Cause Moved to the junk orbit

External resources

sat-index articles

Technical data

Lyngsat transponder loading


Prime contractor GE Astro Space
Platform GE-3000
Mass dry 517 kg
Mass at launch 1169 kg
Mass in orbit 682 kg
Length 1.63 m
Width 1.32 m
Height 0.99 m
Solar array 14.33 m
Stabilization 3-axis
DC power BOL: 1390 W
Design lifetime 10 years
Beacons telemetry: 3.7005 GHz (H), 4.1995 GHz (V)
command: 6.4235 GHz (H)


Main transponders 24
Backup transponders 4
Power 8.5 W (SSPA)
Bandwidth 36 MHz
OLD Coverage & EIRP max Conus: 36 dBW
Alaska: 34 dBW
Hawaii: 32 dBW
Polarization linear H/V

Transponder frequency chart

After its relocation over the Atlantic, the typical EIRP levels available in Europe are between 34 and 28 dBW and in the US east coast between 20 and 28 dBW.

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