电离层异常下GNSS周跳探测及定位性能评估  

Evaluation of GNSS cycle slip detection and location under ionospheric anomaly

作　　者：刘朝颜 罗鑫磊 李秉清 栗广才 宋传峰 LIU Zhaoyan;LUO Xinlei;LI Bingqing;LI Guangcai;SONG Chuanfeng(GNSS Research Center,Wuhan University,Wuhan 430079,China;School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China;State Key Laboratory of Precision Geodesy,Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430077,China;Liaoning Technical University,Fuxin 123032,China;Liaoning Provincial Key Laboratory of Geospatial Information Technology,Fuxin 123032,China)

机构地区：[1]武汉大学卫星导航定位技术研究中心,武汉430079 [2]武汉大学测绘学院,武汉430079 [3]中国科学院精密测量科学与技术创新研究院精密大地测量与定位全国重点实验室,武汉430077 [4]辽宁工程技术大学,阜新123032 [5]辽宁省地理空间信息技术重点实验室,阜新123032

出　　处：《全球定位系统》2025年第1期1-8,共8页Gnss World of China

基　　金：国家重点研发计划(2021YFC3000500);国家自然科学基金(42204021);辽宁省地理空间信息技术重点实验室(辽宁工程技术大学)开放研究基金(LNTUGIT2023-1-2)。

摘　　要：电离层异常会对GNSS定位的可靠性和定位精度产生负面影响.研究和消除电离层异常对GNSS观测质量的影响是确保GNSS定位稳定性的重要前提.本文选取2023年发生的3次电离层异常事件,利用4颗北斗(BeiDou Navigation Satellite System,BDS)地球同步轨道(geostationary orbit,GEO)卫星的伪距和载波相位数据,对比分析了MW(Melbourne-Wunnema)方法组合与历元差分无几何距离(geometry free,GF)组合的周跳探测性能.同时,利用精密单点定位(precise point positioning,PPP)评估了电离层异常对GNSS定位性能的影响.结果表明,在电离层异常情况下依赖固定阈值的MW组合与历元差分GF组合存在周跳漏判情况;电离层异常期间东(E)、北(N)、高程(U)方向的位置精度明显降低,尤其在U方向更加明显.Ionospheric anomaly generate negatively affect for the reliability and positioning accuracy of GNSS.Evaluating and reduction the impact of ionospheric anomaly on the observation quality of GNSS is a prerequisite for ensuring the stability of GNSS position services.In this paper,we select three ionospheric anomaly events in 2023.The performance for cycle slip detection of the MW combination and the differential GF combination is compared using pseudorange and carrier phase from four BDS GEO satellites.Meanwhile,the impact of ionospheric anomaly on the GNSS position performance is evaluated using PPP static displacements.The results show that:1)there may be undetected cycle slip for the MW combination and the differential GF combination relying on fixed thresholds,may have a weekly jump omission.2)the positional accuracies in three components are significantly reduced,with a more pronounced effect on the elevation direction.

关 键 词：电离层异常 周跳探测 定位性能评估 北斗卫星导航系统(BDS) 地球同步轨道(GEO)卫星 精密单点定位(PPP) 

分 类 号：P228[天文地球—大地测量学与测量工程] P207[天文地球—测绘科学与技术]