BDS/GPS单历元短基线动对动定位性能分析  

Performance analysis of BDS/GPS single epoch short baseline motion-to-motion positioning

作　　者：陆雨 邵克凡 LU Yu;SHAO Kefan(Jiangsu Key Laboratory of Resources and Environmental Information Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;School of Environment Science and Spatial Informatics,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)

机构地区：[1]中国矿业大学江苏省资源环境信息工程重点实验室,江苏徐州221116 [2]中国矿业大学环境与测绘学院,江苏徐州221116

出　　处：《测绘科学》2021年第1期1-6,共6页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41674008,41874006,41604006)。

摘　　要：针对在城市峡谷环境下观测卫星较少、观测质量差和周跳频繁,导致动对动定位过程中双差模糊度不连续的问题,提出了一种GPS/BDS组合系统的单历元模糊度解算方法。通过GPS/BDS组合定位提高了卫星的可用数量,利用单历元模糊度固定减弱了周跳频繁带来的影响。实验采用GPS/BDS组合的7组数据,分析了在不同高度角下动对动定位单历元解的模糊度固定率、解算失败率、粗差率和定位精度。结果表明,GPS/BDS组合动对动定位单历元模糊度解算方法,在高遮挡的城市峡谷环境仍然可以取得较好的定位结果。In order to solve the problem of discontinuous ambiguity of double-difference in dynamic positioning due to fewer observation satellites,poor observation quality and frequent cycle slips in urban canyon environment,a single-epoch ambiguity resolution method for GPS/BDS integrated system is proposed.The number of satellites available is increased by GPS/BDS integrated positioning,and the impact of frequent cycle slips is weakened by single epoch ambiguity fixing.Seven sets of data combined with GPS/BDS were used to analyze the ambiguity fixing rate,failure rate,gross error rate and positioning accuracy of single epoch solution of mobile positioning at different altitude angles.The results show that the single epoch ambiguity resolution method of GPS/BDS combined dynamic positioning can still achieve better positioning results in the high occlusion urban canyon environment.

关 键 词：动对动相对定位 单历元模糊度固定 BDS/GPS组合定位 城市峡谷环境 

分 类 号：P228[天文地球—大地测量学与测量工程]