Galileo三频精密单点定位精度分析  

Accuracy Analysis of Galileo Triple-frequency Precise Point Positioning

作　　者：李润芝 LI Runzhi(Surveying and Mapping Product Quality Inspection Center of Huizhou Dayawan Economic and Technological Development Zone,Huizhou 516081,China)

机构地区：[1]惠州大亚湾经济技术开发区测绘产品质量检测中心,广东惠州516081

出　　处：《测绘与空间地理信息》2024年第7期68-71,共4页Geomatics & Spatial Information Technology

摘　　要：基于IGS多个跟踪站多天数据,采用三频无电离层两两组合模型,对比分析了等权、高度角、信噪比3种定权方式下Galileo系统E1E5aE5b、E1E5E5b、E1E6E5b静态与动态精密单点定位精度。实验结果表明,播发E1、E5、E5a、E5b、E6信号的Galileo卫星数与空间几何分布均较优,静态精密单点定位精度均在cm级,而动态精密单点定位E1E5aE5b、E1E5E5b水平精度在cm级,高程精度在dm级。静态精密单点定位高度角定权方式下定位精度最优,E1E5aE5b三频组合定位精度最优。动态精密单点定位高度角定权方式下定位精度最优,等权定权方式下E1E5aE5b定位精度最优,其余两种定位方式下E1E5E5b定位精度最优。Based on the multi-day data of multiple IGS tracking stations,the static and dynamic precise point positioning accuracy of Galileo system E1E5aE5b,E1E5E5b,E1E6E5b under three kinds of weight determination methods,namely equal weight,height an-gle,and signal-to-noise ratio,are analyzed by using the triple-frequency ionospheric free pairwise combination model.The experi-mental results show that the number and spatial geometric distribution of Galileo satellites broadcasting E1,E5,E5a,E5b,E6 signals are better,the static precise point positioning accuracy is at the cm level,while the dynamic precise point positioning accuracy of E1E5aE5b at in the cm level,and the elevation accuracy is at the dm level.The positioning accuracy is the best under the static pre-cision single point positioning height angle weighting mode,and the E1E5aE5b triple frequency combination positioning accuracy is the best.The positioning accuracy of dynamic precise point positioning is the best under the height angle weighting mode,the E1E5aE5b positioning accuracy is the best under the equal weight weighting mode,and the E1E5E5b positioning accuracy is the best under the other two positioning modes.

关 键 词：GALILEO 三频组合 精密单点定位 定权方式 

分 类 号：P228[天文地球—大地测量学与测量工程]