融合SISRE的卫星高度角定权模型及PPP应用性能分析  

SISRE-combined Satellite Elevation-depending Weight Model and Its PPP Application Performance Analysis

作　　者：刘亚 何文涛[1,3] 张洁 LIU Ya;HE Wentao;ZHANG Jie(Institute of Microelectronics of Chinese Academy of Sciences, Beijing 100029, China;University of Chinese Academy of Sciences, Beijing 100049, China;Hangzhou Zhongke Microelectronics Co. Ltd, Hangzhou 310053, China)

机构地区：[1]中国科学院微电子研究所,北京100029 [2]中国科学院大学,北京100049 [3]杭州中科微电子有限公司,浙江杭州310053

出　　处：《测绘科学技术学报》2021年第3期235-239,共5页Journal of Geomatics Science and Technology

基　　金：中国第二代卫星导航系统重大专项(GFZX030302020205)。

摘　　要：在GNSS高精度定位中,观测量定权方式的选择影响着定位的性能,特别是对于实时精密单点定位,由于各个卫星实时轨道及钟差改正数的精度不同,PPP的定位解算性能会受到不同的影响。据此采用融合SISRE的方式将不同卫星轨道及钟差精度信息加入到卫星高度角定权模型中,通过对56个测站单天观测数据进行仿实时PPP实验可以发现,融合SISRE的定权模型在平均情况下可以减少收敛时间约0.91%,个别测站的收敛时间可以减小5 min以上,且可获得静态cm级甚至是mm级定位精度。In GNSS high-precision positioning,the selection of observations weight method affects the positioning performance.Especially for the real-time precise point positioning,the PPP performance will be affected by the different accuracy of the real-time orbit and clock corrections of each satellite.According to this,the information of different satellite orbits and clock accuracies is added to the satellite elevation-depending weight model by using SISRE.Through the pseudo real-time PPP experiment on the single day observation data from 56 stations,it can be found that the SISRE-combined weighting model can reduce the positioning convergence time by 0.91%on average.For individual stations,the convergence time can be reduced by more than 5 min.The positioning accuracy is about cm level or even mm level in static mode.

关 键 词：高度角 空间信号测距误差 实时 精密单点定位 定权模型 SSR改正数 

分 类 号：P228[天文地球—大地测量学与测量工程]