基于DCB改正的BDS/GPS/Galileo多频单点定位精度分析  

Accuracy analysis on BDS/GPS/Galileo multi-frequency SPP based on DCB correction

作　　者：赵庆[1] 高成发[1] 潘树国[2] 张瑞成 Zhao Qing;Gao Chengfa;Pan Shuguo;Zhang Ruicheng(School of Transportation,Southeast University,Nanjing 210096,China;School of Instrument Science and Engineering,Southeast University,Nanjing 210096,China)

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

出　　处：《东南大学学报（自然科学版）》2018年第5期944-948,共5页Journal of Southeast University：Natural Science Edition

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

摘　　要：为了实现多频数据融合处理并有效抑制伪距硬件延迟对定位精度的影响,推导了多频标准单点定位的数学模型,给出了多系统双频/三频观测值组合情况下的DCB改正方法,并以5个MGEX监测站连续7 d的实测三频数据进行验证.结果表明,DCB改正后,BDS,GPS,Galileo系统观测值残差的标准差分别减小了74. 3%,66. 1%和71. 2%;单BDS三频单点定位点位精度提高74. 6%;单BDS双频单点定位与三频单点定位精度相当;相比于单BDS,BDS/GPS及BDS/GPS/Galileo组合单点定位精度分别提高了18. 9%和24. 6%,取得了三维3. 640和3. 385 m的定位精度.To achieve deep fusion of multi-frequency information and effectively suppress the influence of pseudo-range hardware delay on the positioning accuracy,a mathematical model of multi-frequency standard point positioning(SPP)is developed.The differential code bias(DCB)correction method of multi-GNSS(global navigation satellite system)dual/tripe-frequency is proposed and verified by the real triple-frequency data from 5 multi-GNSS experiment(MGEX)stations during seven consecutive days.The results show that after applying DCB correction,the standard deviations of residuals are reduced by 74.3%,66.1%,71.2%for BDS,GPS(global positioning system),Galileo,respectively.The accuracy of single BDS(Beidou navigation satellite system)triple-frequency SPP is improved by 74.6%.The accuracy of dual-frequency SPP is equivalent to that of tripe-frequency SPP for single BDS.Compared with single BDS,the positioning accuracy is improved by 18.9%for BDS/GPS(global positioning system)combination and 24.6%for BDS/GPS/Galileo combination,and the three-dimensional positioning accuracies are 3.640 and 3.385 m,respectively.

关 键 词：差分码偏差 BDS/GPS/Galileo 三频/多频 标准单点定位 

分 类 号：P228.1[天文地球—大地测量学与测量工程]