摘要
为了弥补北斗三号全球卫星导航系统(BDS-3)全星座、多频率相对定位以及组合定位方式相关研究的不足,提出一种BDS-2/BDS-3非组合观测模型的中距离相对定位方法:对BDS-3四频和北斗卫星导航(区域)系统(BDS-2)/BDS-3组合双频观测数据,采用多频载波相位观测数据非组合模型进行相对定位解算;分析BDS-2/BDS-3组合的定位性能,并与BDS-2三频、全球定位系统(GPS)双频解算结果进行对比;然后选取4条不同长度基线进行不同系统相对定位解算,对54km基线充分考虑大气延迟误差的影响,并对定位性能进行分析。实验结果表明,BDS-3收敛速度相较于BDS-2有一倍的提升,并略优于GPS,定位精度相较BDS-2可提升大约40%,但略低于GPS;BDS-2/BDS-3组合模式收敛速度最快、定位精度最高,相较GPS在天顶(U)方向可有8.3%的提升,与BDS-3相比在U方向可有22.1%的提升;BDS-2/BDS-3双频组合定位性能优于GPS、BDS-2和BDS-3多频定位结果。
In order to make up for the deficiency of the related study on the whole constellation,multi-frequency relative positioning and combined positioning of the BeiDou-3 navigation satellite system(BDS-3),the paper proposed a relative positioning method at medium distance for BeiDou navigation satellite(regional)system(BDS-2)/BDS-3 un-combined observation models:for BDS-3 four-frequency and BDS-2/BDS-3 dual-frequency observations,the uncombined model of multi-frequency carrier phase observations was used for relative positioning solution;and the positioning performance of the BDS-2/BDS-3 was analyzed and compared with the BDS-2 three-frequency and global positioning system(GPS)dual-frequency positioning results;then four different length baselines were selected for the relative positioning solutions for different systems,and the influence of atmospheric delay error was fully considered for the 54 km baselines to further improve the positioning performance.Experimental results showed that the convergence rate of BDS-3 would be twice higher than that of BDS-2,and slightly better than that of GPS,and the positioning accuracy could be improved by about 40%compared with BDS-2,but slightly lower than that of GPS;the combined mode of BDS-2/BDS-3 would have the fastest convergence speed and the highest positioning accuracy,with an 8.3%improvement in the U-direction compared with GPS,and a 22.1%improvement in the U-direction compared with BDS-3;the BDS-2/BDS-3 dual-frequency combined positioning performance could be better than the multi-frequency positioning results of GPS,BDS-2 and BDS-3.
作者
祝会忠
李壮
雷啸挺
ZHU Huizhong;LI Zhuang;LEI Xiaoting(School of Geomatics,Liaoning Technical University,Fuxin,Liaoning 123000,China;The State Key Laboratory of Satellite Navigation System and Equipment Technology,Shijiazhuang 050081,China)
出处
《导航定位学报》
CSCD
2023年第2期49-60,79,共13页
Journal of Navigation and Positioning
基金
国家自然科学基金项目(42030109,42074012)
卫星导航系统与装备技术国家重点实验室开放基金项目(CEPNT-2018KF-13)
辽宁省重点研发计划项目(2020JH2/10100044)
辽宁省“兴辽英才计划”项目(XLYC2002101,XLYC2008034,XLYC2002098)。
关键词
北斗卫星导航系统(BDS)
大气延迟误差
整周模糊度
收敛速度
BeiDou navigation satellite system(BDS)
atmospheric delay constraint
integer ambiguity
convergence speed
