Abstract Since orbit determination accuracy can be affected by the distribution of stations, the relevant formulas are derived. In this paper, one station selection strategy, taking into account the number of stations, the quality of observation data and the geographic distribution of stations, is proposed. Using the global observation network data of IGS and iGMAS, three different station distribution contrast schemes are designed. Then, the GPS precise orbit determination experiment is carried out. The results show that the orbital accuracies of three schemes with well-distributed stations are obviously better than those which do not consider station distribution. The 3D orbit accuracy can reach about 6.0 cm using 30 well-distributed global stations, and the level of 3.5 cm using 40 stations. The accuracy level reaches 2.8 cm, if 50 stations are used. However, extra stations beyond 50 have almost no effect in improving orbit accuracy.
DANG Jintao,GUO Dongxiao,LI Jianwen et al. Study of Station Selection Strategy in Zero-Difference Precise Orbit
Determination of Navigation Satellites[J]. jgg, 2015, 35(6): 997-1000.
DANG Jintao,GUO Dongxiao,LI Jianwen et al. Study of Station Selection Strategy in Zero-Difference Precise Orbit
Determination of Navigation Satellites[J]. jgg, 2015, 35(6): 997-1000.