On the Impact of RF Front-end Group Delay Variations on GLONASS Pseudorange Accuracy

Tobias Felhauer

Abstract:	In this Paper, first of all the impact of ditTerent group delay characteristics on the 1s GLONASS interchannel delay bias errors is analysed and discussed by theoretical analysis as well as by computer simulations. The result of these analysis is a quite simple, generic and novel algorithm which can be applied to evaluate the impact of any measured group delay characteristic on the GLONASS pseudorange accuracy. Furthermore it is shown that -just as in the ease of mukipath - by redueing the m-relator spacing within the Delay Look Loop (narrow correlating) the sensitivity against group delay variations ean be signitieantly redueed. Finally, the proposed evaluation algorithm is applied using typical group delay characteristics measured at the GLONASS RF front-end of the combined GPS/GLONASS receiver module ASN-22 developed by Dairnler-Benz Aerospaee, Ulm Germany.
Published in:	Proceedings of the 10th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1997) September 16 - 19, 1997 Kansas City, MO
Pages:	1527 - 1532
Cite this article:	Felhauer, Tobias, "On the Impact of RF Front-end Group Delay Variations on GLONASS Pseudorange Accuracy," Proceedings of the 10th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1997), Kansas City, MO, September 1997, pp. 1527-1532.
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