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UHF 11

Also called USA 174


Designation 28117 / 03057A
Launch date 18 Dec 2003
Country of origin United States
Mission Military: telecommunications
Geostationary orbit unofficial: 71.5°E, inclined
Launch vehicle Atlas Centaur #142

Same as UHF-10. Was an option to the initial contract. Construction start authorized in Jan 2001.
Satellite and launch costed $193 million

External resources

sat-index articles

Technical data


In January 2009, Boeing said it successfully reconfigured the satellite, adding 30 percent more communications capability. Its ability to reprogramme existing user channels allowed Boeing to exploit small, unused portions of the allocated radio frequency spectrum to add 10 channels, for a total of 54.

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