北斗精密定轨精度评估及站点分布影响分析  

Accuracy Assessment of BDS Precision Orbit Determination and the Influence Analysis of Site Distribution

作　　者：陈明[1,2,4] 郭际明[1] 武军郦[2,4] 宋伟伟[3,4] 张龙平 CHEN Ming;GUO Jiming;WU Junli;SONG Weiwei;ZHANG Longping(School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China;National Geomatics Center of China,Beijing 100830,China;Research Center of GNSS,Wuhan University,Wuhan 430079,China;Key Laboratory of Navigation&Location Based Service,National Administration of Survey,Mapping and Geoinformation,Beijing 100830,China;Chinese Academy of Surveying&Mapping,Beijing 100830,China)

机构地区：[1]武汉大学测绘学院,湖北武汉430079 [2]国家基础地理信息中心,北京100830 [3]武汉大学卫星导航定位技术研究中心,湖北武汉430079 [4]导航与位置服务国家测绘地理信息局重点实验室,北京100830 [5]中国测绘科学研究院,北京100830

出　　处：《测绘学报》2018年第B12期93-100,共8页Acta Geodaetica et Cartographica Sinica

基　　金：国家重点研发计划(2017YFF0212005);国家自然科学基金(41804038)~~

摘　　要：北斗精密轨道确定是北斗系统应用的一项关键内容,基准站数量和分布情况是影响定轨精度的重要因素。本文基于国际GNSS服务组织(International GNSS Service,IGS)多系统实验网(multi-GNSS experiment,M-GEX)站和中国区域的基准站共123站进行北斗精密定轨,得到目前较高精度的北斗精密轨道:GEO、IGSO和MEO卫星的定轨精度(1DRMS)为10.3 cm、2.8 cm和3.2 cm,径向精度均优于2 cm。在此基础上分析了中国区域基准站对北斗定轨的贡献,结果表明加入中国区域基准站后,重叠弧段精度平均提高了17.6%,其中IGSO卫星精度提高了36.3%。采用ODOP值和SLR检核方法进一步分析后发现,ODOP改善趋势、SLR检核精度提高程度与重叠弧段精度一致。BDS precision orbit determination is a key content of the BDS application,and the number and distribution of reference stations are important factors affecting the accuracy of the orbit determination.In this paper,the BDS precise orbit determination results are obtained by using the IGS MGEX stations and the national reference stations in China.The accuracy of orbit determination of GEO,IGSO and MEO is 10.3 cm,2.8 cm and 3.2 cm,and the radial accuracy is better than 2 cm.The results show that the accuracy of the overlapping arcs is increased by 17.6% after adding the national reference stations in China,and the accuracy of IGSO satellite is improved by 36.3%.The results of ODOP and SLR were further analyzed.It was found that the improvement of ODOP improved area and SLR was consistent with the accuracy of overlapping arc.

关 键 词：北斗精密定轨 精度评估 中国国家基准站 基准站分布 定轨精度衰减因子 

分 类 号：P228[天文地球—大地测量学与测量工程]