摘要
针对第三代北斗卫星导航系统(BDS-3)全球成功组网完成后,原先第二代北斗卫星导航系统(BDS-2)部分广播星历轨道精度较差的卫星会影响整体相对定位解算精度的问题,提出了在使用BDS-2/BDS-3卫星进行相对定位过程中,需要顾及某些长基线的存在,并且对参与解算的卫星进行慎重选择。该文采用亚太及周边区域内部分多模GNSS实验站(MGEX)发布的观测数据,顾及卫星的广播星历轨道精度及卫星空间位置精度因子(PDOP)两种因素,制定不同的卫星选择方案以研究其对相对定位精度的影响情况。研究表明,各方案中当剔除C01~C05卫星时基线解算精度和站点定位精度都能达到最高,其中,各方向基线解算精度在5 mm以内,站点定位精度可达到15 mm。
For the problem of after the third-generation Beidou satellite navigation system(BDS-3)has successfully completed the global network,some satellites with poor orbital accuracy of the broadcast ephemeris of the second-generation Beidou satellite navigation system(BDS-2)will affect the overall relative positioning solution accuracy,puts forward that in the process of using BDS-2/BDS-3 satellites for relative positioning,it is necessary to take into account the existence of certain long baselines and carefully select the satellites participating in the calculation.This paper adopts the observation data of some multi-GNSS experiment(MGEX)in the Asia Pacific and surrounding regions,taking into account two factors of the satellite broadcast ephemeris orbit accuracy and the satellite position dilution of precision(PDOP),formulates different satellite selection schemes to study their influence on the relative positioning accuracy.Research shows that the accuracy of baseline resolution and site positioning accuracy can reach the highest in each scheme when C01~C05 satellites are eliminated,the baseline resolution accuracy of each direction is within 5 mm,and the site positioning accuracy can reach 15 mm.
作者
曹多明
成英燕
常春涛
王周杰
卢浩
CAODuoming;CHENG Yingyan;CHANG Chuntao;WANG Zhoujie;LU Haou(College of Geodesy and Geomatics,Shandong University of Science and Technology,Qingdao,Shandong 266590,China;Chinese Academy of Surveying and Mapping,Beijing 100036,China;Beijing Fangshan Satellite Laser Ranging National Observation and Research Station,Beijing 102488,China)
出处
《测绘科学》
CSCD
北大核心
2022年第1期15-23,共9页
Science of Surveying and Mapping
基金
国家重点研发计划项目(2016YFB0501405)。
