不同IGS分析中心产品精密单点定位结果分析  

Comparatively analysis of PPP results for products of different IGS analysis centers

作　　者：何一辛 李浩军 周晋 HE Yixin;LI Haojun;ZHOU Jin(College of Surveying and Geo-Informatics,Tongji University,Shanghai 200092,China;Shanghai Geological&Mineral Engineering Investigation Co.,Ltd.,Shanghai 200072,China)

机构地区：[1]同济大学测绘与地理信息学院,上海200092 [2]上海地矿工程勘察有限公司,上海200072

出　　处：《导航定位学报》2020年第1期38-42,共5页Journal of Navigation and Positioning

基　　金：国家自然基金面上项目（41674029,41974025）

摘　　要：为了进一步研究对国际全球卫星导航系统服务组织(IGS)产品的应用,在精密单点定位(PPP)时高效选取不同IGS分析中心的轨道和钟差产品,对各产品以及PPP解算结果的参考框架进行比较与分析:利用IGS不同分析中心提供的精密轨道和钟差产品,对全球分布的15个跟踪站进行精密单点定位解算;并求取解算结果间以及轨道间的7参数。实验结果表明:各分析中心产品均具备较高精度,其中德国地学研究中心(GFZ)、欧洲航天局(ESA)及欧洲定轨中心(CODE)的产品较为优秀;另外,轨道间的微小差异影响PPP参考框架的确定,2者空间平移参数相差1×10^3数量级,且轨道产品对定位的影响比钟差产品更大,故在实际PPP解算时应注意提高轨道产品的精度。In order to further study on the product application of IGS,efficiently select the orbit and clock products of different IGS analysis centers in PPP,the paper comparatively analyzed the products and the reference frames of PPP results:by using the precise orbit and clock products from different IGS analysis centers,the PPP solutions of 15 global IGS tracking stations were processed;and the seven parameters between the solution results and between the orbits respectively were calculated.Experimental result showed that:the products of all the analysis centers could have rather high precision,among which GFZ,ESA and COD would be the best;in addition,small difference between the satellite orbits would affect the determination of the PPP reference frame,and the spatial translation parameters between the orbits and between the PPP results respectively would be different by 1×10^3 orders of magnitude;meanwhile,the impact of the orbit products on positioning would be greater than that of the clock products,so more attention should be paid to improving the accuracy of the orbit products for PPP solution.

关 键 词：全球卫星导航系统 国际全球卫星导航系统服务组织分析中心 轨道和钟差产品 精密单点定位 点位误差 7参数 

分 类 号：P228[天文地球—大地测量学与测量工程]