Development and Testing of an Optimal Cascading Scheme to Resolve Multi Frequency Carrier Phase Ambiguities

J. Liu, P. Alves, M.G. Petovello, G. Macgougan, L. deGroot, M.E. Cannon and G. Lachapelle

Abstract:	The impact of observation selection, observation combination and model parameterization on carrier phase ambiguity resolution and position accuracy, under operational conditions is investigated in this paper. The impact of an ionospheric bias for a generic linear combination of L1 and L2 measurements is assessed and the results of this investigation are used to clearly outline the desirable characteristics for improving ambiguity resolution versus positioning accuracy performance. The ambiguity resolution performance and position accuracy are shown for the wide-lane (WL), L1 only, and ionospheric-free (IF) combinations. Several techniques to deal with the ionospheric bias are also presented and compared, including stochastic ionospheric modeling. Multiple carrier phase combination solutions estimated in the same filter are also compared. The concept of an optimal processing strategy, in terms of both reliable ambiguity resolution and high accuracy positions, is presented.
Published in:	Proceedings of the 15th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2002) September 24 - 27, 2002 Oregon Convention Center Portland, OR
Pages:	933 - 944
Cite this article:	Liu, J., Alves, P., Petovello, M.G., Macgougan, G., deGroot, L., Cannon, M.E., Lachapelle, G., "Development and Testing of an Optimal Cascading Scheme to Resolve Multi Frequency Carrier Phase Ambiguities," Proceedings of the 15th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2002), Portland, OR, September 2002, pp. 933-944.
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