Abstract In this paper, the truncated error of the earth gravity model is analyzed with RTOD simulation experiments, using the space-borne GPS observation data from several LEO satellites at different orbit heights. The optimal degrees and orders of the earth gravity model are chosen to match with RTOD solutions about 1.0 m using pseudo-range measurements and 0.5 m using carrier-phase measurements. Finally, this method is tested using other space-borne GPS data from CHAMP and TerraSAR-X satellites. The results show that our method can determine the optimal degree and order of the earth gravity model in RTOD, without the need of precise satellite orbit parameters. It is convenient to be applied to satellite missions for RTOD.
WANG Fuhong,WANG Jun,GONG Xuewen et al. A Method to Determine the Optimal Degree and Order for the Earth Gravity Model in Real-Time Orbit Determination,Using Space-Borne GPS Measurements[J]. jgg, 2017, 37(2): 149-153.
WANG Fuhong,WANG Jun,GONG Xuewen et al. A Method to Determine the Optimal Degree and Order for the Earth Gravity Model in Real-Time Orbit Determination,Using Space-Borne GPS Measurements[J]. jgg, 2017, 37(2): 149-153.
