Investigation of Measurement Inconsistency in Dual-Frequency GPS Receivers

Y. Gao, F. Lahaye, P. Héroux, X. Liao, N. Beck, and M. Olynik

Abstract:	Inconsistent dual-frequency pseudorange measurements among GPS receivers of different make and model is a concern to operators and users of GPS networks interested in wide-area differential GPS (WADGPS) corrections, ionospheric TEC measurements and precise time transfer. Gao et al. (1999) confirmed that there exists measurement inconsistency between different types of receivers. This paper first investigates the behavior of differences between L1 C/A and P code pseudoranges (C1-P1). It proposes a method for precise estimation of C1-P1 biases, reports the results and considers the C1-P1 residual time series after bias removal. Secondly, it investigates the time variation of inter-receiver differences between C1, P1 and P2 pseudoranges. Potential effects of these variations on user applications are reported. Numerical analysis is provided based on data acquired from a multi-receiver, zero-baseline configuration that included several dual-frequency GPS receivers using a common external atomic clock.
Published in:	Proceedings of the 12th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1999) September 14 - 17, 1999 Nashville, TN
Pages:	251 - 258
Cite this article:	Gao, Y., Lahaye, F., Héroux, P., Liao, X., Beck, N., Olynik, M., "Investigation of Measurement Inconsistency in Dual-Frequency GPS Receivers," Proceedings of the 12th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1999), Nashville, TN, September 1999, pp. 251-258.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In