北斗GEO/IGSO/MEO卫星广播星历的轨道精度评估  

Evaluation of Orbital Accuracy for BDS GEO/IGSO/MEO Satellite Broadcast Ephemeris

作　　者：蔡玉林 吴汤婷 范亚楠 全莹 CAI Yulin;WU Tangting;FAN Yanan;QUAN Ying(School of Surveying and Geoinformation Engineering,East China University of Technology,330013,Nanchang,PRC;Nanchang Branch of Guangzhou South Surveying and Mapping Technology Co.,Ltd,330200,Nanchang,PRC)

机构地区：[1]东华理工大学测绘与空间信息工程学院,南昌330013 [2]广州南方测绘科技股份有限公司南昌分公司,南昌330200

出　　处：《江西科学》2024年第5期1027-1033,共7页Jiangxi Science

基　　金：赣鄱俊才支持计划-主要学科学术和技术带头人培养项目(20232BCJ23018);江西省自然科学基金项目(20224BAB213048)。

摘　　要：获取卫星轨道位置是卫星导航系统进行定位导航的前提,卫星轨道的精度是影响实时定位导航精度的主要因素之一。以武汉大学IGS数据中心发布的精密星历作为参考基准,分析评估了北斗卫星导航系统的地球静止轨道(Geostationary Earth Orbit,GEO)、倾斜地球同步轨道(Inclined Geosynchronous Satellite Orbit,IGSO)和中圆地球轨道(Medium Earth Orbit,MEO)3类轨道卫星的轨道精度。结果表明,GEO卫星的三维轨道精度为2.44~9.88 m,URE精度为2.50~8.45 m;IGSO卫星的三维轨道精度为1.95~3.12 m,URE精度为1.65~2.88 m;MEO卫星的三维轨道精度为1.74~3.18 m,URE精度为1.04~1.53 m;IGSO和MEO卫星轨道精度优于GEO卫星轨道精度,且GEO卫星轨道存在一定的系统偏差;3类轨道卫星的径向轨道精度要优于切向和法向的轨道精度。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 realtime 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.

关 键 词：北斗卫星导航系统 广播星历 轨道坐标 精度评估 

分 类 号：P228[天文地球—大地测量学与测量工程]