Abstract:In this paper, we analyze the difference between GLONASS broadcast ephemeris and GLONASS precise ephemeris. The results show that uncalibrated equipment delay parameter is the predominant factor of the GLONASS broadcast ephemeris clock error. Based on pseudorange residuals analysis, the IFBs of stations and satellites are separated. A modified model of IFB and pseudorange positioning of broadcast ephemeris is proposed. The modified model is verified by dynamic positioning. The results show that the precision has been improved by 51.1%, 41.7%, 48.3% in N,E,U components, respectively.
LIU Jiao,CHEN Junping,WANG Bin. A Modified GLONASS Pseudorange Positioning Model to Estimated Satellite-Dependent IFB and Its Verification[J]. jgg, 2021, 41(1): 27-33.