Evaluation of Orbital Accuracy for BDS GEO/IGSO/MEO Satellite Broadcast Ephemeris
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.
万方数据
维普
