SLR数据对北斗卫星精密定轨的作用分析  

Analysis of the Impact of SLR Data on Precise Orbit Determination of BeiDou Satellites

作　　者：孔垚 张小贞 孙保琪[2,3,4] 刘枫 KONG Yao;ZHANG Xiaozhen;SUN Baoqi;LIU Feng(Xi’an Polytechnic University,Xi’an 710048,China;National Time Service Center,Chinese Academy of Sciences,Xi’an 710060,China;School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Precise Positioning and Timing Technology,Chinese Academy of Sciences,Xi’an 710600,China)

机构地区：[1]西安工程大学,陕西西安710048 [2]中国科学院国家授时中心,陕西西安710060 [3]中国科学院大学天文与空间科学学院,北京100494 [4]中国科学院精密导航定位与定时技术重点实验室,陕西西安710600

出　　处：《测绘学报》2018年第B12期86-92,共7页Acta Geodaetica et Cartographica Sinica

基　　金：国家自然科学基金(41104021);iGMAS项目;国家科技基础条件平台项目“国家基础科学数据共享服务平台”(DKA2017-12-02-24)~~

摘　　要：除了进行微波观测外,还可以对北斗卫星进行SLR观测。为提高北斗卫星轨道产品准确度和一致性,本文提出联合GNSS和SLR两种观测手段进行北斗卫星轨道确定,分析SLR数据对北斗卫星精密定轨的作用。GNSS和SLR联合定轨在法方程域进行,系统间权比为1∶1。采用全球114个MGEX测站和26个SLR测站对北斗C08、C10、C11三颗卫星进行解算分析,结果表明:联合SLR数据可明显提高北斗卫星轨道径向精度;与GNSS解相比,联合解对北斗MEO卫星轨道精度影响较大,对北斗IGSO卫星轨道精度影响相对较小。Besides microwave tracking data,satellite laser ranging (SLR) tracking data of BeiDou Satellites can also be obtained.In order to improve the accuracy and consistency of precise satellite orbit product and analysis the impact of SLR to BeiDou satellite orbit,combined precise orbit determination of BeiDou satellites based on GNSS and SLR data was proposed in this paper.Combined precise orbit determination was carried out on normal equation level,and the ratio between GNSS and SLR data was 1∶1.Data process was carried out using 114 MGEX stations and 26 SLR stations for BeiDou C08,C10 and C11 satellites.The results show that combined SLR data can improve the radial precision of BDS satellites.Compared with GNSS solutions,combined solution has more effect on the orbit precision of BDS MEO satellites than that of BDS IGSO satellites.

关 键 词：北斗卫星导航系统 联合定轨 卫星激光测距 法方程 

分 类 号：P228[天文地球—大地测量学与测量工程]