北斗卫星精密轨道与钟差精度分析

发布时间：2018-01-15 11:38

本文关键词：北斗卫星精密轨道与钟差精度分析　出处：《测绘科学》2017年12期 　论文类型：期刊论文

【摘要】：针对北斗卫星导航系统的卫星姿态模型、天线相位中心改正及卫星定轨数据处理策略未统一的现状,该文对比分析了武汉大学和德国地学研究中心提供的北斗事后精密轨道和钟差产品的差异及精度,结合实测数据,通过分析精密单点定位的定位精度来比较两中心精密轨道和钟差的差异。实验结果表明:北斗卫星的精密轨道精度与轨道类型有关,地球静止轨道(GEO)卫星的轨道精度为米级,倾斜地球同步轨道(IGSO)卫星的轨道精度为分米级,中地球轨道(MEO)卫星切向、法向和径向的精度分别为10.81、5.41和3.37cm;GEO卫星钟差精度优于0.38ns,IGSO卫星钟差优于0.25ns,MEO卫星钟差优于0.15ns;两家分析中心产品的北斗静态精密单点定位的平面精度相当;北斗静态精密单点定位的RMS统计值平面精度优于3cm,三维精度优于7cm。
[Abstract]:According to the satellite attitude model of Beidou satellite navigation system, the status of antenna phase center correction and satellite orbit determination data processing strategy is not uniform. In this paper, the difference and accuracy of Beidou precise orbit and clock difference products provided by Wuhan University and German Geoscience Research Center are compared and analyzed, and the measured data are combined. By analyzing the positioning accuracy of precise single point positioning, the difference between the precision orbit and clock difference between the two centers is compared. The experimental results show that the precision orbit accuracy of Beidou satellite is related to the type of orbit. The orbit accuracy of geostationary orbit (GEO) satellite is meter level, that of inclined geostationary orbit (IGSO) satellite is decimeter, and that of MEO (middle Earth orbit) satellite is tangential. The accuracy of normal direction and radial direction are 10.81 ~ 5.41 and 3.37 cm respectively. The accuracy of GEO satellite clock difference is better than 0.38nsGSO satellite clock difference is better than 0.25ns / s GEO satellite clock difference is better than 0.15ns; The plane accuracy of the Beidou static precision single point positioning of the products of the two analytical centers is equivalent; The RMS statistical accuracy of Beidou static single point positioning is better than 3 cm and the 3D accuracy is better than 7 cm.
【作者单位】：辽宁工程技术大学测绘与地理科学学院;
【基金】：国家自然科学基金项目(41504010,41474020) 国家重点研发计划项目(2016YFC0803102) 辽宁省教育厅一般项目(LJYL009) 辽宁省高等学校创新团队项目(LT2015013)
【分类号】：P228.4;TN967.1
【正文快照】： 0引言北斗卫星导航系统(BeiDou navigation satellitesystem,BDS)是中国正在实施自主发展、独立运行的全球卫星导航系统[1]。2012年12月28日BDS已有5颗地球静止轨道(geostationary earthorbit,GEO)卫星、5颗倾斜地球同步轨道(inclinedgeo-synchronous satellite orbit,IGSO)卫

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