Evaluation of GPS On-the-Fly Ambiguity Resolution Techniques

Jon Burgess

Abstract:	Real-time, highly accurate civil applications for GPS-derived coordinates are undergoing extensive development daily. Differential positioning based on the GPS C/A code provides real-time accuracies in the range of 3 to 5 meters today, while carrier-smoothed differential positioning, also based on the C/A code, can yield real-time accuracies in the l- to 3- meter range -- an unheard of accuracy just a few years ago! To achieve sub-decimeter accuracies in real-time with the portion of the GPS signals available to the general public, it is necessary to resolve carrier-phase ambiguities while in motion (i.e., on-the-fly or OTF). Based on published information, there are currently only a few people able to reliably achieve this feat with post- processed data. Preeminent among these are Dr. Remondi of the National Geodetic Survey (NGSI in the United States and an organization of researchers in Germany consisting of Dr. Euler, Dr. Hein and Dr. Landau of terraSat.- This paper will present a technical discussion on resolving carrier-phase ambiguities OTF using their proposed techniques, data processed using their algorithms compared with a truth system, and some final conclusions based on research of their algorithms.
Published in:	Proceedings of the 48th Annual Meeting of The Institute of Navigation (1992) June 29 - 1, 1992 ANA Westin Hotel Dayton, OH
Pages:	409 - 416
Cite this article:	Burgess, Jon, "Evaluation of GPS On-the-Fly Ambiguity Resolution Techniques," Proceedings of the 48th Annual Meeting of The Institute of Navigation (1992), Dayton, OH, June 1992, pp. 409-416.
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