Abstract:

It is very meaningful for modeling the inter-frequency clock bias (IFCB) and assessing the stability of the satellite clock to analyze the characterization of the IFCB. The triple-frequency data from COMPASS covering Jan.1-31, 2012 is processed to compute the IFCB of the GEO satellite. To reduce the influence of the gross error on the computed results, the robust estimation is used in data processing. Based on the estimated results, the IFCB series of the GEO satellite is analyzed. According to the features of the IFCB of the GEO satellites, an empirical model is presented. The performances of the model indicate that the quadratic function can describe the IFCB of the COMPASS GEO satellite well, by which more than 71% inter-frequency clock bias can be corrected.

Key words: Triple-frequency signals, Precise Point Positioning, Inter-frequency clock bias, COMPASS