顾及伪距差分系统间偏差的GPS/BDS/Galileo/QZSS伪距差分定位精度分析  

Accuracy analysis of GPS / BDS /Galileo/QZSS pseudo-range differential positioning considering pseudo-range differential inter-system bias corrections

作　　者：闻贺 潘树国[1] 高旺 赵庆[2] WEN He;PAN Shuguo;GAO Wang;ZHAO Qing(School of Instrument Science and Engineering,Southeast University,Nanjing 210096,China;School of Transportation,Southeast University,Nanjing 210096,China)

机构地区：[1]东南大学仪器科学与工程学院,江苏南京210096 [2]东南大学交通学院,江苏南京210096

出　　处：《测绘工程》2020年第4期15-20,26,共7页Engineering of Surveying and Mapping

基　　金：国家自然科学基金资助项目(41574026,41774027);江苏省重点研发计划(BE2016176);国家重点研发计划(2016YFB0502101);江苏省六大人才高峰计划(2015-WLW-002)。

摘　　要：随着BDS、Galileo和QZSS等卫星导航系统的发展,GNSS正朝着多系统组合定位的方向发展。本文针对GPS/BDS/Galileo/QZSS,提出四系统间伪距差分模型,并对其定位性能分析。结果表明:无论是相同还是不同类型的接收机,伪距DISB在几天范围内是稳定不变的。同时通过设置截止高度角进行模拟遮挡实验。实验结果表明:相对于常规的系统内伪距差分方法,系统间伪距差分方法在截止高度角为30°、40°、50°下的定位精度分别提升19.62%、33.11%、57.77%。该方法可以有效提升定位的精度和可靠性,特别是在遮挡严重的环境下改进明显。With the development of construction of BDS、Galileo and QZSS,the multi-GNSS combination is a trend.Aiming at GPS/BDS/Galileo/QZSS,the pseudo-range inter-system differencing positioning model is proposed,then analyzed the positioning performance.The time-domain stability of the pseudo-range differential inter-system bias(DISB)between different systems is analyzed emphatically.The result shows that the pseudo-range DISB is stable in a few days,whether it is the same or different type of receiver,so it can be used as known information for subsequent positioning.In addition,the simulation occlusion experiment is carried out by setting different cut-off elevation angles.The experimental results show that with the increase of the cut-off elevation angle,the inter-system pseudo-range differencing method can increase the number of pseudo-range double-difference observation equations and improve the success rate of positioning.Compared with the intra-system pseudo-range differencing method,the positioning accuracy of the inter-system pseudo-range differencing method at the cut-off elevation angle of 30 degrees,40 degrees and 50 degrees is improved by 19.62%,33.11%and 57.77%,respectively.The method can effectively improve the accuracy and reliability of positioning,especially in the severe occlusion environment.

关 键 词：伪距系统间偏差 GPS/BDS/Galileo/QZSS 伪距差分定位 

分 类 号：P228[天文地球—大地测量学与测量工程]