Salient Features of the GPS Block IIR Spacecraft Design

A. Das

Abstract:	This paper describes some of the new design features of the GPS Block IIR Space Vehicles (SVs) being built by Lockheed Martin Astro Space (LMAS). LMAS will deliver twenty-one Block IIR spacecraft to the United States Air Force between 1996 and 2001 for replenishing the GPS constellation, which now has been declared fully operational with 24 Block II and IIA SVs in orbit and 4 ground spares ready to launch. For GPS Users, the Block IIR SVs are compatible with the present constellation. The new features of the Block IIR can be classified in five groups, which are: a) Increased autonomy, b) Increased accuracy, c) Increased survivability, d) Increased operability, and e) reduced susceptibility to electromagnetic interference (EMI). These ‘aspects are discussed in the paper.
Published in:	Proceedings of the 51st Annual Meeting of The Institute of Navigation (1995) June 5 - 7, 1995 Antlers Doubletree Hotel Colorado Springs, CO
Pages:	87 - 105
Cite this article:	Das, A., "Salient Features of the GPS Block IIR Spacecraft Design," Proceedings of the 51st Annual Meeting of The Institute of Navigation (1995), Colorado Springs, CO, June 1995, pp. 87-105.
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