Evaluation of High-Precision, Single-Frequency GPS Point Positioning Models

Tomas Beran, Sunil B. Bisnath, Richard B. Langley

Abstract:	In this paper we evaluate the performance of single frequency, single-point positioning processors with an emphasis on ionospheric delay handling. A number of least-squares processors with single-frequency code-only and code-and-carrier-phase observables were developed. Processing model hierarchy is based on measurement error handling, starting with a basic code-based navigation solution and progressing to the code-and-carrier-phase model. Measurement error handling includes receiver clock error reduction by the between-satellite differencing process, various ionospheric delay models and a tropospheric delay prediction model. Ionosphere-free results are compared against values from global ionospheric delay maps. Our current point positioning processors achieve few dm-level accuracy.
Published in:	Proceedings of the 17th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2004) September 21 - 24, 2004 Long Beach Convention Center Long Beach, CA
Pages:	1893 - 1901
Cite this article:	Beran, Tomas, Bisnath, Sunil B., Langley, Richard B., "Evaluation of High-Precision, Single-Frequency GPS Point Positioning Models," Proceedings of the 17th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2004), Long Beach, CA, September 2004, pp. 1893-1901.
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