BDS-2/BDS-3实时卫星钟差的性能分析  

Performance analysis of BDS-2/BDS-3 real-time satellite clock offset joint estimation

作　　者：王浩浩 黄观文[1] 付文举 谢威 曹钰 WANG Haohao;HUANG Guanwen;FU Wenju;XIE Wei;CAO Yu(College of Geological Engineering and Geomatics,Chang'an University,Xi'an 710054,China;State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,Wuhan 430079,China)

机构地区：[1]长安大学地质工程与测绘学院,西安710054 [2]武汉大学测绘遥感信息工程国家重点实验室,武汉430079

出　　处：《导航定位学报》2021年第1期61-67,共7页Journal of Navigation and Positioning

基　　金：国家自然科学基金项目(41774025);二代导航重大专项(GFZX0301040308);陕西省杰出青年基金项目(2019JC-20)。

摘　　要：为了弥补对北斗三号(BDS-3)实时卫星钟差的定位服务性能及北斗二号(BDS-2)的定位服务性能提升幅度相关研究的不足,提出1种性能分析方法:基于非差模型分别对BDS-2和BDS-2/BDS-3的实时卫星钟差进行估计及精度分析:并利用估计的卫星钟差产品进行实时动态精密单点定位(PPP)模拟实验。结果表明:实时估计的BDS-2、BDS-2/BDS-3卫星钟差标准差(STD)均优于0.5 ns;随着BDS-3卫星的加入,联合估计BDS2/BDS3钟差的STD相对于BDS-2单系统结果平均提升了18%;BDS-2/BDS-3组合实时动态PPP定位相对于BDS-2单系统能够取得更短的收敛时间和更优的定位精度。In order to supplement the insufficiency of related study on the positioning service performance of BeiDou navigation satellite System with global coverage(BDS-3)real-time satellite clock bias and the improvement extent of positioning service performance of BeiDou navigation satellite regional System(BDS-2),the paper proposed a performance analysis method:BDS-2,BDS-2/BDS-3 real-time satellite clocks were estimated respectively and the accuracy was evaluated based on the undifferenced model;and real-time kinematic Precise Point Positioning(PPP)stimulation experiments were performed with the real-time estimated satellite clock product.Results showed that the Standard Deviations(STD)of the real-time estimated BDS-2 and BDS-2/BDS-3 satellite clock offsets could be both better than 0.5 ns;with the participation of BDS-3 satellites,the STD of the joint real-time estimated BDS-2/BDS-3 satellite clock offsets would be averagely improved by 18%compared to BDS-2;meanwhile,the positioning performance of BDS-2/BDS-3 real-time kinematic PPP could achieve shorter convergence time and better positioning accuracy relative to BDS-2 single-system.

关 键 词：北斗三号 非差模型 卫星钟差估计 动态精密单点定位 

分 类 号：P228[天文地球—大地测量学与测量工程]