The Calibration of Differential GPS Reference Sites

Anthony R. Pratt

Abstract:	A number of techniques have been developed which allow the relative performance of both different antennas and different reference sites for differential GPS to be compared. These are necessary for the user of such systems in the preliminary set-up trials for a permanent installation. Several techniques have been developed as follows: 1. Fourier Transform methods allow the user to distinguish and count the different multipath signal paths for each satellite. This allows a user potentially to filter out unwanted multipath propagation and/or physically determine which local reflectors cause the unwanted path. 2. A second order regression technique has been developed which allows the user to produce residual error statistics pertinent to each location and satellite by time. The use of these techniques ensures that the reference site will give GPS performance which is satisfactory to the needs of that specific differential system.
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:	547 - 556
Cite this article:	Pratt, Anthony R., "The Calibration of Differential GPS Reference Sites," Proceedings of the 4th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1991), Albuquerque, NM, September 1991, pp. 547-556.
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