第11卷第1期导航定位学报Vol.11，No.12023年2月JournalofNavigationandPositioningFeb.，2023引文格式：刘小明，刘俊钊，李浩军.GPS双差模糊度在实时精密单点定位中的应用[J].导航定位学报,2023,11(1):134-141.（LIUXiaoming,LIUJunzhao,LIHaojun.ApplicationofGPSdouble-differenceambiguityinreal-timepecisepointpositioning[J].JournalofNavigationandPositioning,2023,11(1):134-141.）DOI:10.16547/j.cnki.10-1096.20230120.GPS双差模糊度在实时精密单点定位中的应用刘小明1，刘俊钊2,3，李浩军3（1.广西壮族自治区地质环境监测站，广西梧州543000；2.翱捷科技(上海)有限公司，上海201203；3.同济大学测绘与地理信息学院，上海200092）摘要：针对小范围全球定位系统（GPS）实时精密单点定位（PPP）收敛速度慢、外部观测信息依赖较高等问题，提出一种适用于小范围的实时PPP应用算法：利用GPS非组合双频观测值计算单个PPP用户星间单差模糊度；通过引入少量参考站单差模糊度建立双差约束，消除卫星端小数偏差，从而恢复模糊度参数的整数特性；此外，通过该方法恢复的模糊度参数同双差观测模型解算的模糊度参数等价，可直接进行整数固定，提高PPP解算效率。实验结果表明，该方法可加快实时PPP参数收敛速度，提高PPP的最终收敛精度。关键词：精密单点定位；相位模糊度；定位精度中图分类号：P228文献标志码：A文章编号：2095-4999(2023)01-0134-08ApplicationofGPSdouble-differenceambiguityinreal-timepecisepointpositioningLIUXiaoming1,LIUJunzhao2,3,LIHaojun3（1.GeologicalEnvironmentMonitoringStationofGuangxiZhuangAutonomousRegion,Wuzhou,Guangxi543000,China;2.ASRMicroelectronics(Shanghai)Co.,Ltd.,Shanghai201203,China;3.CollegeofSurveyingandGeo-informatics,TongjiUniversity,Shanghai200092,China）Abstract：Aimingattheproblemsofslowconvergencespeedandhighdependenceonexternalobservationinformationinsmall-scaleglobalpositioningsystem(GPS)real-timeprecisepointpositioning(PPP),areal-timePPPapplicationalgorithmsuitableforsmall-scaledeformationmonitoringisproposed.ThemethodusesGPSuncombineddual-frequencyobservationstocalculatethesingle-differenceambiguitybetweensatellitesofasinglePPPuser,establishesadouble-differenceconstraintbyintroducingthesingle-differenceambiguityofthereferenc...
