不同纬度GPS/BDS-3精密单点定位性能分析  

Performance analysis of GPS/BDS-3 precise point positioning at different latitudes

作　　者：杨诗妮 何丽娜[1] 戴伟成 曾平 文援兰 YANG Shini;HE Lina;DAI Weicheng;ZENG Ping;WEN Yuanlan(School of Earth Sciences and Engineering,Hohai University,Nanjing 211100,China)

机构地区：[1]河海大学地球科学与工程学院,江苏南京211100

出　　处：《甘肃科学学报》2024年第1期72-78,共7页Journal of Gansu Sciences

基　　金：国家自然科学基金(41974001)。

摘　　要：为分析不同纬度区域GPS/BDS-3组合精密单点定位精度及其收敛时间,实验选取了MGEX(Multi-GNSS experiment)7个测站连续14 d的观测数据,对GPS/BDS-3组合进行精密单点定位(PPP)技术定位性能分析,并与GPS、BDS-3单系统进行对比。结果表明,无论是静态定位还是动态定位模式下,由于低纬度地区电离层较为活跃,导致数据质量较差,测站的收敛时间比高纬度测站长。此外,在静态定位模式下,GPS/BDS-3组合在水平方向定位精度优于0.8 cm,高程方向优于1.4 cm;GPS/BDS-3组合对于BDS-3单系统而言在水平方向定位精度提高了26.3%,高程方向提高了42.9%。在动态定位模式下,GPS/BDS-3组合在水平方向定位精度优于1.8 cm,高程方向优于3.8 cm;GPS/BDS-3组合对于BDS-3单系统而言在水平方向定位精度提高了35.59%,高程方向提高了56.10%。In order to analyze the positioning accuracy and convergence speed of the GPS/BDS-3 combination precise point positioning model in different latitude regions,this paper selects the observation data of 7 stations of MGEX(Multi-GNSS experiment)for 14 consecutive days.The PPP positioning performance was analyzed for the combination of GPS/BDS-3,which compared with BDS-3 and GPS single system.The results show that no matter in the static positioning or dynamic positioning mode,the ionosphere is more active in low-latitude regions,resulting in poor data quality,the convergence time of the stations is longer than that of high-latitude stations.In addition,in the static positioning mode,the positioning accuracy of the GPS/BDS-3 combination is better than 0.8 cm in the horizontal and 1.4 cm in vertical.The GPS/BDS-3 combination improves the positioning accuracy of the BDS-3 system by 26.3%in the horizontal and 42.9%in vertical.In the dynamic positioning mode,the GPS/BDS-3 combination has a positioning accuracy of better than 1.8 cm in horizontal and better than 3.8 cm in vertical.The GPS/BDS-3 combination improves the positioning accuracy of the BDS-3 system by 35.6%in the horizontal and 56.1%in vertical.

关 键 词：GPS/BDS-3 精密单点定位 定位精度 收敛时间 

分 类 号：P228[天文地球—大地测量学与测量工程]