GDOP and RAIM in Differential Operation

James L. Farrell

Abstract:	Familiar matrix forms customarily used in evaluating performance of satellite geometries and in setting thresholds for Receiver Autonomous Integrity Monitoring (RAIM) need modification for differential applications. When positions are determined through differencing across satellites, usage of a common space vehicle (SV) produces correlations. Neglecting correlations between differenced observation errors would produce inconsistent DOP values and imprecise integrity thresholds. Rigorous analysis of correlation effects has produced very surprising matrix forms that have not appeared previously. These have led to new results, presented herein with interpretations and operational ramifications.
Published in:	Proceedings of the 2001 National Technical Meeting of The Institute of Navigation January 22 - 24, 2001 Westin Long Beach Hotel Long Beach, CA
Pages:	648 - 656
Cite this article:	Farrell, James L., "GDOP and RAIM in Differential Operation," Proceedings of the 2001 National Technical Meeting of The Institute of Navigation, Long Beach, CA, January 2001, pp. 648-656.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In