A Global DOD-Optimized DGPS for Precision-Strike

Earl Blackwell, Mark Moeglein, and David Nakayama

Abstract:	Low-cost, all-weather, precision-strike weapon delivery without the need for expensive seeker-based guidance is of interest to the DOD community. This paper presents concepts based on a militarized version of Differential GPS (DGPS) that offers potential submeter, GPS-based navigation accuracies. Key features of the DOD DGPS concept enable reference receiver/user separations in excess of 1000 nmi and DGPS correction latencies of 30 min or more. This technology could potentially be transferred into the GPS system infrastructure to allow submeter, Precise Positioning Service accuracy. Results from a concept feasibility demonstration of a long-baseline (2000-nmi) DGPS experiment are presented. Application of this principle to a CONUS-wide DGPS network using four authorized GPS reference receiver sites is also presented, including measurements of network correction accuracies. The Joint Direct Attack Munition (JDAM) program sponsored development and demonstration of this concept; however, the technology is applicable to virtually every authorized GPS receiver.
Published in:	Proceedings of the 8th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1995) September 12 - 15, 1995 Palm Springs, CA
Pages:	399 - 411
Cite this article:	Blackwell, Earl, Moeglein, Mark, Nakayama, David, "A Global DOD-Optimized DGPS for Precision-Strike," Proceedings of the 8th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1995), Palm Springs, CA, September 1995, pp. 399-411.
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