Demonstration on the indexes design of space-borne KBR and GPS receiver in the low-low satellite-to-satellite tracking mode

The error models of cumulative geoid height influenced by the errors of inter-satellite range, range rate of KBR system and the satellite position of GPS receiver are deduced respectively. The combined error model of cumulative geoid height influenced by range rate error and satellite position error is also constructed. The results show that the precision indexes of inter-satellite range, range rate of KBR system are about 0.64×10-6 m, 0.8×10-6 m/s, respectively. While the precision indexes of satellite position of GPS receiver is about 2.1 cm. The cumulative geoid height error of Earth's gravity field model in 120 degree, which is recovered by the combined error model, is 26 cm in the presence of these precision indexes.