BDS/GPS/GLONASS组合在峡谷河段的定位性能和精度  

Positioning performance and accuracy of BDS GPS GLONASS combination in canyon reach

作　　者：姚明经 YAO Mingjing(Three Gorges Navigation Authority,Yichang 443002,China)

机构地区：[1]长江三峡通航管理局,湖北宜昌443002

出　　处：《水运工程》2023年第11期164-172,共9页Port & Waterway Engineering

基　　金：交通运输行业重点科技清单项目(2020-MS5-133);长航局科技项目(CKJ2020-02B)。

摘　　要：针对峡谷河段的不同卫星组合下网络实时动态(RTK)测试较少的情况,对三峡大坝至葛洲坝两坝间峡谷河段BDS/GPS/GLONASS组合下的流动站定位性能和精度进行测试。采取6种观测模式,测试内容为定位服务时效性、空间可用性和定位精度。结果表明,国产GNSS设备BDS网络RTK达到规范要求,固定解比例为98.1%,可以达到水平0.02 m、高程0.05 m的定位精度,一定程度上优于GPS。BDS和BDS/GLONASS双系统2种网络RTK在缺失或不使用GPS信号时,依然可提供高精度定位服务。组合定位能够弥补单一系统的不足,融合系统较各单系统均有不同程度的提高,BDS/GPS/GLONASS和BDS/GPS在定位服务时效性、空间可用性测试和定位精度方面均最优。In view of the fact that there are few network RTK tests under different satellite combinations in the canyon reach,this paper tests the positioning performance and accuracy of the mobile station under the BDS GPS GLONASS combination between the Three Gorges Dam and the Gezhouba Dam.Six observation modes are adopted to test positioning service timeliness,spatial availability and positioning accuracy.The results show that the BDS network RTK of domestic GNSS equipment meets the specification requirements,the fixed solution ratio is 98.1%,and the positioning accuracy of 0.02 m level and 0.05 m elevation can be achieved,which are better than GPS to a certain extent.BDS and BDS GLONASS dual-system network RTK can still provide high-precision positioning services when GPS signals are missing or not used.Combined positioning can make up for the shortcomings of a single system,and the fusion system has different degrees of improvement compared with each single system.BDS GPS GLONASS and BDS GPS are optimal in terms of positioning service timeliness,spatial availability test and positioning accuracy.

关 键 词：BDS/GPS/GLONASS 可见性 几何精度因子 内符合精度 外符合精度 初始化时间 空间可用性 

分 类 号：U612[交通运输工程—船舶及航道工程]