GNSS载波相位快速相对定位全球精度分析  

Global precision analysis of GNSS carrier phase fast relative positioning

作　　者：任鹏羽 周乐韬 高小波 李雪 陈武旭 REN Pengyu;ZHOU Letao;GAO Xiaobo;LI Xue;CHEN Wuxu(Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu 611756,China)

机构地区：[1]西南交通大学地球科学与环境工程学院,成都611756

出　　处：《导航定位学报》2023年第5期120-127,171,共9页Journal of Navigation and Positioning

基　　金：国家重点研发计划项目(2022YFC3005703);国家自然科学基金项目(41874008)。

摘　　要：为了进一步提高全球卫星导航系统(GNSS)的定位精度,对目前北斗三号全球卫星导航系统(BDS-3)、美国全球定位系统(GPS)、俄罗斯格洛纳斯卫星导航系统(GLONASS)和欧盟伽利略卫星导航系统(Galileo)的载波相位快速相对定位精度在全球的分布情况进行探究:计算四大系统载波相位相对定位单历元解和半小时解的精度衰减因子(DOP);并提取1个周期的精度衰减因子时间序列的上限值作为指标,绘制和分析各个系统的载波相位相对定位在全球的精度分布图。结果表明:BDS-3与GPS的载波相位快速相对定位整体精度相当,且优于GLONASS和Galileo;而四个系统中BDS-3相对定位精度上限最高,GPS、GLONASS、Galileo的精度上限依次降低;各大全球定位系统在满足全球相对定位应用需求的同时,也各自在最关注的区域有相应的优势,其中BDS-3的相对定位精度在亚太地区最高,GPS在南北美洲的定位精度优于其他系统,GLONASS在高纬度地区的相对定位精度为其服务区域内最高。In order to further improve the positioning accuracy of global navigation satellite system(GNSS),the paper explored the current global distribution of carrier phase fast relative positioning precision of Beidou-3 global navigation satellite system(BDS-3),the American global positioning system(GPS),the Russian global navigation satellite system(GLONASS)and the European Union’s Galileo navigation satellite system(Galileo):the dilutions of precision(DOPs)of single-epoch solutions and half-hour solutions for carrier phase relative positioning of the four systems were calculated;and the upper limit of a periodic time series of the DOPs was extracted as an index to map and analyze the global precision distribution for carrier phase relative positioning of each system.Results showed that the precision of carrier phase fast relative positioning for BDS-3 and GPS would be equivalent,and better than that of GLONASS and Galileo;moreover,the upper limit of relative positioning precision for BDS-3 could be the highest among the four systems,and GPS,GLONASS and Galileo would decrease successively;while meeting the needs of global relative positioning applications,each major global positioning system could also have corresponding advantages in their most concerned regions,among which the relative positioning accuracy of BDS-3 could be the highest in the Asia-Pacific region,the positioning accuracy of GPS could be better than that of other systems in North and South America,and the relative positioning accuracy of GLONASS in the high latitude region could be the highest in its service area.

关 键 词：卫星导航系统 载波相位相对定位 单历元解 半小时解 精度衰减因子(DOP) 

分 类 号：P228[天文地球—大地测量学与测量工程]