GPS/Galileo精密单点定位模糊度解算与实验分析  

Ambiguity resolution and experimental results analysis for GPS/Galileo precise point positioning

作　　者：吕伟才 高井祥[3] 刘天骏[3] LV Weicai;GAO Jingxiang;LIU Tianjun(School of Geomatics,Anhui University of Science&Technology,Huainan,Anhui 232001,China;Key Laboratory of Aviation-aerospace-ground Cooperative Monitoring and Early Warning of Coal Mining-induced Disasters of Anhui Higher Education Institutes,Huainan,Anhui 232001,China;School of Environmental Science and Spatial Informatics,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)

机构地区：[1]安徽理工大学测绘学院,安徽淮南232001 [2]安徽理工大学矿山采动灾害空天地协同监测与预警安徽普通高校重点实验室,安徽淮南232001 [3]中国矿业大学环境与测绘学院,江苏徐州221116

出　　处：《测绘科学》2019年第11期195-204,共10页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41474026);淮南矿业(集团)有限责任公司项目(HNKY-JTJS(2018)-178,HNKY-JTJS(2017)-122,HNKY-JTJS(2013)-28)

摘　　要：针对提高多频模糊度固定解的GNSS精密单点定位的可靠性与稳定性的问题,该文基于实时非组合相位偏差产品,对三频非差非组合GPS/Galileo PPP的浮点解、固定解模型进行深入研究,并设计了3种定位策略,选取了17个MGEX跟踪站7d的实测数据,分析了三频非差模糊度固定解对静态、仿动态PPP定位精度与滤波收敛时间的影响。结果表明,滤波收敛后,与浮点解策略相比较,固定三频模糊度对高程、水平方向定位精度均有提高,在静态定位模式中提升幅度分别约为20.45%和37.50%,在仿动态定位模式中提升幅度分别约为22.41%和33.33%。在滤波收敛时间方面,相较于浮点解策略的收敛时间,静态与仿动态定位中模糊度固定策略的收敛时间分别提升了约12.57%和6.41%。In order to improve the reliability and stability of precise point positioning(PPP)based on the multi-frequency integer ambiguity resolution(AR),the float-ambiguity and fixed-ambiguity of triplefrequency undifferential and uncombined observations PPP model were analyzed based on uncombined phase biases in this paper.To verify the effectiveness and performance of triple-frequency PPP AR in the static and kinematic model,datasets from 17 Multi-GNSS Experiment(MGEX)lasting for 7 days were analyzed with three data processing methods.Numerous experiment results showed that the triple-frequency PPP AR method could improve significantly the positioning precision in the vertical and horizontal direction after filter convergence,compared with the float-ambiguity method,the improvement rate reached 20.45% and 37.50%in the static positioning model,and the improvement rate reached 22.41% and 33.33%in the kinematic model.In terms of convergence time,the improvement rate reached 12.57% and 6.41%in the static and kinematic model respectively in comparison to float-ambiguity method.

关 键 词：整数相位钟 实时精密单点定位 非差模糊度固定 非差非组合 

分 类 号：P228[天文地球—大地测量学与测量工程]