Geodetic Processing Using Full Dual Band Observables

John Nolan, Sergei Gourevitch and John Ladd

Abstract:	The testing and evaluation of GPS receiver systems is an interesting and important subject. Due to the high cost of precise GPS equipment, many organizations are required to spend considerable time and effort in evaluating systems to allow them to make informed purchasing decisions. To assist in this effort, this paper presents practical tests for evaluating the quality of a GPS system. These empirical methods are then used to investigate the system noise characteristics of the Ashtech P-12 receiver. The Ashtech P-12 receiver is a high end receiver that provides both full wavelength carrier observables and P-Code pseudo ranges on both Ll and L2 frequencies. As a result of this testing, quantitative estimates are derived for the system noise of the Ashtech P-12 system. An analysis of the various properties of the system noise are also made. Finally, discussion is given to some of the issues that confront an agency trying to compare and analyze different GPS systems.
Published in:	Proceedings of the 5th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1992) September 16 - 18, 1992 Albuquerque, NM
Pages:	1033 - 1041
Cite this article:	Nolan, John, Gourevitch, Sergei, Ladd, John, "Geodetic Processing Using Full Dual Band Observables," Proceedings of the 5th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1992), Albuquerque, NM, September 1992, pp. 1033-1041.
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