GPS/BDS联合定轨对北斗卫星轨道的影响分析  

Effect Analysis of GPS/BDS Combined Orbit Determination on Beidou Satellite Orbits

作　　者：彭汉兵 杨元喜[2] 王刚 李瑜 PENG Hanbing;YANG Yuanxi;WANG Gang;LI Yu(School of Surveying and Mapping,Information Engineering University,62 Kexue Road,Zhengzhou 450001,China;State Key Laboratory of Geo-Information Engineering,1 Mid-Yanta Road,Xi’an 710054,China;Beijing Satellite Navigation Center,22 Beiqing Road,Beijing 100094,China;China Earthquake Networks Center,5 Sanlihenanheng Street,Beijing 100045,China)

机构地区：[1]信息工程大学地理空间信息学院,郑州市科学大道62号450001 [2]西安测绘研究所地理信息工程国家重点实验室,西安市雁塔路中段1号710054 [3]北京卫星导航中心,北京市北清路22号100094 [4]中国地震台网中心,北京市三里河南横街5号100045

出　　处：《大地测量与地球动力学》2018年第12期1262-1267,1290,共7页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(41374019;41574010)~~

摘　　要：为研究不同条件下GPS/BDS联合定轨对北斗卫星轨道的影响,在不同测站分布条件下采用不同定轨弧长分别进行GPS/BDS联合定轨和BDS独立定轨,并从轨道重叠弧段不符值、与MGEX分析中心产品比较以及卫星激光测距检核残差3个方面详细比较两种定轨方法的精度。结果表明,区域网条件下,联合定轨能够显著提升1d解北斗IGSO/MEO卫星的轨道精度,但对3d解的北斗各类卫星定轨精度的改善较小;全球网条件下,无论是采用1d还是3d定轨弧长,联合定轨均能在一定程度上改善北斗IGSO/MEO卫星轨道沿迹方向和法向的精度,但对径向绝对精度的改善较小;而对于北斗GEO卫星,全球网条件下的联合定轨对其轨道各方向精度的影响均较小。In order to study the effect of GPS/BDS combined orbit determination(OD)on Beidou navigation satellite system(BDS)orbits in different cases,GPS/BDS combined and BDS-only OD experiments are conducted respectively,adopting different lengths of OD arc and different distributions of ground tracking network.Precision and accuracy of OD results of these two methods are compared thoroughly by orbit overlapping arc difference,difference with MGEX products and satellite laser ranging(SLR)residuals.The results show that,with the regional tracking network,GPS/BDS combined OD can noticeably improve the precision and accuracy of BDS IGSO/MEO satellite orbits for 1-day solution but only have marginal improvement on that of all types of BDS satellite orbits for 3-day solution.With the global tracking network,combined OD can improve the precision in along-track and cross-track directions of BDS IGSO/MEO satellite orbits for both 1-day and 3-day solutions but have minimal improvement on the accuracy in radial direction.Furthermore,combined OD barely has an effect on the precision and accuracy in all directions of BDS GEO satellite orbits.

关 键 词：北斗卫星导航系统 联合定轨 重叠弧段不符值 MGEX SLR残差 

分 类 号：P228[天文地球—大地测量学与测量工程]