Processins GLONASS Carrier Phase Observations - Theory and First Experience

Gerald Mader, Jacques Beser, Alfred Leick and Jinye Li

Abstract:	The GLONASS (ICD-92) double difference carrier observables must be transformed to either a common frequency or to linear distances in order for the relative receiver clock errors to cancel. Such a scaling causes the double difference equations to contain single difference ambiguities whose coefficients depend on the GLONASS frequencies. Pseudoranges are used to compute an approximate single difference ambiguity value for the base satellite. This additional step, which is not required for GPS, allows the double difference ambiguity formulation. However, this initial approximation of the single difference ambiguity must meet certain accuracy limitations. Dual- frequency pseudoranges and carrier phase observations to 5 GLONASS satellites are used to verify software implementation and to draw conclusions such as the need for frequency-dependent hardware delay calibrations and the need for accurate pseudoranges.
Published in:	Proceedings of the 8th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1995) September 12 - 15, 1995 Palm Springs, CA
Pages:	1041 - 1047
Cite this article:	Mader, Gerald, Beser, Jacques, Leick, Alfred, Li, Jinye, "Processins GLONASS Carrier Phase Observations - Theory and First Experience," Proceedings of the 8th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1995), Palm Springs, CA, September 1995, pp. 1041-1047.
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