Abstract We propose a numerical iterative search-based method to determine the optimal settings of random process parameters for pseudo-ambiguity by controlling orbit determination strategies and other variables. The GPS data from doy 92 to 101 in 2021 of GRACE-C and SWARM-A LEO satellites are used, along with CNT and MADOCA real-time precise ephemeris products to simulate real-time precise orbit determination(RTPOD). We conduct optimization experiments of random process parameters for pseudo-ambiguity. The results indicate that under the optimal parameter settings, the RTPOD three-dimensional position errors of the two LEO satellites range from approximately 4.62 to 7.56 cm. Compared to traditional floating-point ambiguity solution, the RTPOD accuracy with CNT and MADOCA products exhibit an average improvement of about 39.15% and 29.61%, respectively.
ZHANG Wanwei,LIU Yukang,WANG Fuhong. Optimization of Random Process Parameters for Pseudo-Ambiguity in Real-Time Precise Orbit Determination of LEO Satellites Using Space-Borne GPS Data[J]. jgg, 2024, 44(7): 680-683.
ZHANG Wanwei,LIU Yukang,WANG Fuhong. Optimization of Random Process Parameters for Pseudo-Ambiguity in Real-Time Precise Orbit Determination of LEO Satellites Using Space-Borne GPS Data[J]. jgg, 2024, 44(7): 680-683.