Obtaining satellite orbit position is the premise of satellite navigation system for positioning and navigation.The satellite orbit accuracy is one of the main factors affecting the accuracy of real-time positioning and navigation.Taking the precise ephemeris released by the IGS data center of Wuhan University as a reference,the study analyzed and evaluated the orbital accuracy of the three types of orbit satellites of the Beidou satellite navigation system:Geostationary Earth Orbit(GEO),Inclined Geosynchronous Satellite Orbit(IGSO)and Medium Earth Orbit(MEO).The results show that the three-dimensional orbit accuracy of GEO satellite is 2.44～9.88 m,and the URE accuracy is 2.50～8.45 m.The three-dimensional orbit accuracy of the IGSO satellite is 1.95～3.12 m,and the URE accuracy is 1.65～2.88 m.The three-dimensional orbit accuracy of the MEO satellite is 1.74～3.18 m,and the URE accuracy is 1.04～1.53 m;The orbital accuracy of IGSO and MEO satellites is better than that of GEO satellites,and GEO satellite orbits showcase certain systematic deviations;The radial orbit accuracy of the three types of orbit satellites is better than the tangential and normal orbital accuracy.
维普
万方数据