Independent Ship Trajectory Estimates from GPS C/A Code and From Trisponder Compared

Kenneth W. Rhoades

Abstract:	The interim constellation of Global Positioning System satellites converges each day for several hours within range of the Catalina Channel area of Southern California. A Magnavox T-Set, which is an interim GPS-User navigational experience product of Magnavox Advanced Products and Systems Company is used aboard the research vessel Duchess Diane to produce dynamic position. velocity, and absolute time estimates by sequential processing of the GPS L1-Band C/A Code. These estimates and related GPS system data are recorded on 9-track magnetic tape by a high speed data processing system aboard the ship. A Del Norte Trisponder distance measuring unit furnishes real-time range estimates to three accurately surveyed remote Trisponder sites. These range estimates are recorded on the same magnetic tape as the GPS data, and are also available for independent real-time estimates of ship position and ground velocity, The paper presents the quantitative results of off-line comparison of the time-ordered GPS-only geodetic latitude and longitude estimates with the equally timeordered Trisponder-only geodetic ship position estimates, Ship velocity and geodetic antenna height estimates are also discussed.
Published in:	Proceedings of the 1985 National Technical Meeting of The Institute of Navigation January 15 - 17, 1985 San Diego, CA
Pages:	34 - 41
Cite this article:	Rhoades, Kenneth W., "Independent Ship Trajectory Estimates from GPS C/A Code and From Trisponder Compared," Proceedings of the 1985 National Technical Meeting of The Institute of Navigation, San Diego, CA, January 1985, pp. 34-41.
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