Extended RAIM (ERAIM): Estimation of SV Clock Offset

James L. Farrell

Abstract:	A method has been devised for extending RAIM. Whereas conventional RAlM excludes the suspect SV from the solution, ERAIM retains it while furthermore including its bias as a ffih unknown to be estimated. In a 5-SV snapshot both RAIM and ERAIM form five solutions, with each SV taking its turn as the suspected bias source. Extension to six Sv’s for fault isolation produces a parity scalar. Additional elaborations address complications such as multiple biased Sv’s, bias histories not limited to ramps, and further augmentation for time base differences in an integrated system.
Published in:	Proceedings of the 5th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1992) September 16 - 18, 1992 Albuquerque, NM
Pages:	945 - 949
Cite this article:	Farrell, James L., "Extended RAIM (ERAIM): Estimation of SV Clock Offset," Proceedings of the 5th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1992), Albuquerque, NM, September 1992, pp. 945-949.
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