北斗卫星载波动态差分定位最新性能评估  

The latest performance evaluation of beidou satellites carrier dynamic differential positioning

作　　者：高冠友 马下平[1] 贺小星 林超才[4] GAO Guanyou;MA Xiaping;HE Xiaoxing;LIN Chaocai(College of Geomatics,Xi’an University of Science and Technology,Xi’an 710054,China;School of Civil and Surveying&Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;School of Civil Engineering and Architecture,East China Jiao Tong University,Nanchang 330013,China;Rows 247 of Hunan Non-Ferrous Metals Geology Investigation Bureau,Changsha 410129,China)

机构地区：[1]西安科技大学测绘科学与技术学院,西安710054 [2]江西理工大学土木与测绘学院,江西赣州341000 [3]华东交通大学土木建筑学院,南昌330013 [4]湖南省有色地质勘查局二四七队,长沙410129

出　　处：《测绘工程》2022年第6期68-75,共8页Engineering of Surveying and Mapping

基　　金：国家自然科学基金资助项目(41904171,42104023);江西理工大学高层次人才科研启动项目(205200100564)。

摘　　要：为了评估BDS载波动态差分的最新定位性能,文中选择在巴西、美国、澳大利亚和中国境内共8个IGS站构成的基线长度在30 km以下的4条基线,基于2021-10-08—2021-08-14 BDS,GPS以及BDS+GPS观测数据进行载波动态差分定位,统计并分析可见卫星数目、ENU时间序列和定位精度,获得了BDS最新的载波动态差分定位性能。结果表明,BDS可见卫星数明显多于GPS;BDS与GPS载波动态差分定位结果稳定性基本相同;BDS与GPS载波动态差分定位精度在E,N,U方向均能达到cm级精度,且在E和N方向的定位精度优于1 cm。与单系统相比,BDS与GPS的组合系统能较好地提高定位精度。In order to evaluate the latest positioning performance of BDS carrier dynamic difference, four baselines with a baseline length of less than 30 km composed of 8 IGS stations in Brazil, the United States, Australia and China are selected for carrier dynamic difference positioning based on the observation data of BDS,GPS and combined BDS with GPS from October 8 to 14,2021.The number of visible satellites, ENU time series and positioning accuracy are statistically analyzed to obtain the latest carrier dynamic differential positioning performance of BDS.The results show that the number of visible satellites for BDS is significantly more than that for GPS.The stability of BDS and GPS carrier dynamic differential positioning results is basically the same.The BDS and GPS carrier dynamic differential positioning accuracy can reach centimeter-level accuracy in the E,N,and U directions, and the positioning accuracy in the E and N directions is better than 1 cm.Compared with the single system, the combined system of BDS and GPS can better improve the positioning accuracy.

关 键 词：BDS GPS 载波动态差分 性能评估 时间序列 

分 类 号：P228[天文地球—大地测量学与测量工程]