Analysis of Three Ambiguity Resolution Methods for Real Time Static and Kinematic Positioning of a GPS Receiver

L. Baroni, H.K. Kuga, K. O'Keefe

Abstract:	The objective of this work is to compare the performance of three methods of ambiguity resolution: LSAST, LAMBDA, and FASF. To do this evaluation, the methods were implemented in software and data were collected using two dual frequency geodetic quality Trimble R8 GPS receivers in static situation and two Ashtech Z12 GPS receivers in kinematic situation. The data were processed using LSAST, LAMBDA, and FASF methods for ambiguity resolution. During the processing, the float solution and ambiguity resolution process was reset once every 5 minutes. The ability of the methods to obtain a fixed solution was then analyzed in terms of time to fix and percentage of correct ambiguity fixes, where truth ambiguities were obtained by processing the entire data set using LAMBDA without any filter resets. As these methods use distinct search space reduction processes, differences in ambiguity resolution time and correct fix percentage were observed.
Published in:	Proceedings of the 22nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2009) September 22 - 25, 2009 Savannah International Convention Center Savannah, GA
Pages:	2020 - 2028
Cite this article:	Baroni, L., Kuga, H.K., O'Keefe, K., "Analysis of Three Ambiguity Resolution Methods for Real Time Static and Kinematic Positioning of a GPS Receiver," Proceedings of the 22nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2009), Savannah, GA, September 2009, pp. 2020-2028.
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