TDRS 4

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General

Designation	19883 / 89021B
Launch date	13 Mar 1989
Country of origin	United States
Mission	Telecommunications
Geostationary orbit	41°W, inclined
Launch vehicle	STS 29

C-band marketed by CCC. On 15 May 1998 the C-band should not be used anymore to avoid interferences with Intelsat 806. In exchange Intelsat will use Intelsat 515 (to be renamed Columbia 515) at 37.5°W.

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Location

Begin	End	Position
L: 13 Mar 1989	Nov 1996	41°W
Nov 1996	Mar 2005	41°W, inclined
Apr 2005		46°W, inclined

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End of life

Out of service	Dec 2011
Cause	Decommissioned and later moved to the junk orbit

sat-index articles

Technical data

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C-band EIRP coverage (dBW)
C-band G/T coverage (dB/K)

Specifications
S-band
C-band
Ku-band
C-band transponder frequency chart

Went inclined on 15 Oct 1996. Beacon: 2.211 GHz

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