TDRS 9

Also called TDRS I

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General

Designation	27389 / 02012A
Launch date	8 Mar 2002
Country of origin	United States
Mission	Telecommunications
Geostationary orbit	151°W
Launch vehicle	Atlas 2A #137

To be tested from 151°W.

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Location

Begin	End	Position
L: 8 Mar 2002	Oct 2003	151°W
Jan 2004	Sep 2004	173.5°W
Mar 2005		64.5°W
Aug 2009	Aug 2011	62°W
Sep 2011	Apr 2015	41°W
Jun 2015	Jan 2019	12°W
Apr 2019	Jan 2023	62.3°W

Four days after launch, an anomaly occured with one of the 4 fuel tanks, pressure has dropped: a faulty valve prevented helium to pressurize a tank. Once a neighboring tank was empty, helium could be transfered to the faulty tank and little burns were possible. The satellite finally arrived in GEO in early Oct 2002 after months of effort! Enough fuel is available for the 15-year lifetime.

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End of life

Out of service	Jan 2023
Cause	Sent to junk orbit

Technical data

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Specifications

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