Operational Response to an Aging Global Positioning System Constellation

John J. Losinski

Abstract:	In the past year, many changes have taken place in the Global Positioning System (GPS) constellation. By the end of 2000, nine Block II and IIA satellites, which have a 7.5-year design life, will be greater than ten years old. Although these satellites have historically performed very well, they are now showing signs of old age. At least three Block II satellites will be disposed of in 2000, and several others located in primary slots will be rephased and replaced by the new Block IIR satellites. This paper details the actions taken by the 2d Space Operations Squadron during the past year to optimize the global coverage and availability of the Global Positioning System in response to an aging constellation.
Published in:	Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000) September 19 - 22, 2000 Salt Palace Convention Center Salt Lake City, UT
Pages:	2543 - 2546
Cite this article:	Losinski, John J., "Operational Response to an Aging Global Positioning System Constellation," Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000), Salt Lake City, UT, September 2000, pp. 2543-2546.
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