| 北斗卫星精密轨道与钟差精度分析 |
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| 引用本文： | 杨徐,徐爱功,祝会忠,高猛,唐龙江.北斗卫星精密轨道与钟差精度分析[J].测绘科学,2017(12):7-13. |
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| 作者姓名： | 杨徐 徐爱功 祝会忠 高猛 唐龙江 |
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| 作者单位： | 辽宁工程技术大学测绘与地理科学学院,辽宁阜新,123000 |
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| 基金项目： | 国家自然科学基金项目，国家重点研发计划项目，辽宁省教育厅一般项目，辽宁省高等学校创新团队项目 |
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| 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。
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| 关 键 词： | 北斗卫星导航系统 精密轨道 精密钟差 精密单点定位 |
The precision analysis of BDS precise orbit and precise clock |
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| Abstract: | Aiming at the problems of BeiDou navigation satellite system has not formed a unified satellite attitude model and antenna phase center corrections model and the strategy of orbit determination,this paper analyzed the precision of BeiDou navigation satellite system(BDS)precise orbit products and precise clock products between Wuhan University and Geo Forschungs Zentrum.Based on the real data,the positioning accuracy of precision point positioning was analyzed between two different providers.The results showed that the precision of BeiDou orbit was assessed by different characteristics among geostationary earth orbit (GEO) and inclined geosynchronous satellite orbit (IGSO) and medium earth orbit (MEO) constellations,the precision of GEO orbits was at meter level,the precision of IGSO was at decimeter level,the precision of MEO orbits was 10.81 cm in along,5.41 cm in cross,3.37 cm in radical.The precision of GEO clock,IGSO clock,MEO clock was 0.38 ns,0.25 ns,and 0.15 ns respectively.The positioning accuracy of precision point positioning was quiet between two different analysis centers providers in horizontal.The positioning accuracy of static BeiDou precise point positioning was about 3 cm in horizontal and 7 cm in vertical. |
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| Keywords: | BDS precise orbit precise clock precise point positioning |
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