A Comparison of Data Transmission Methods for Realtime Differential GPS

Frank Howard, Duane Kurtin, Mark Leach, and Michael Begala

Abstract:	This paper describes an evaluation of several data transmission methods for broadcasting realtime differential GPS corrections. The evaluation is based on coverage, signal reliability in various operational environments, and delay time. The methods include telecommunications satellite, cellular telephone, and dedicated radio. The methods are first described and the results of an experiment, which was performed to evaluate the transmission methods are presented. The experiment was designed to test the suitability of each method for use in a variety of positioning and vehicle tracking applications by the Texas Department of Transportation. Factors which were considered in the analysis of the data included the percentage of error free transmission, sensitivity to shading iu various rural and urban environments, and special difficulties involved with receiving the signal in a moving vehicle.
Published in:	Proceedings of the 4th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1991) September 11 - 13, 1991 Albuquerque, NM
Pages:	855 - 862
Cite this article:	Howard, Frank, Kurtin, Duane, Leach, Mark, Begala, Michael, "A Comparison of Data Transmission Methods for Realtime Differential GPS," Proceedings of the 4th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1991), Albuquerque, NM, September 1991, pp. 855-862.
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