磁暴主相期间BDS-3新频点SPP定位精度分析  

The SPP positioning accuracy of BDS-3 new frequency point during the main phase of magnetic storm

作　　者：张政浩 贾小林 严祥高[1] 王凯 ZHANG Zhenghao;JIA Xiaolin;YAN Xianggao;WANG Kai(College of Geological Engineering and Geomatics,Chang’an University,Xi’an 710054,China;State Key Laboratory of Geographic Information Engineering,Xi’an 710054,China;Xi’an Institute of Surveying and Mapping,Xi’an 710054,China;Beijing Institute of Tracking and Communication Technology,Beijing 100094,China)

机构地区：[1]长安大学地质工程与测绘学院,西安710054 [2]地理信息工程国家重点实验室,西安710054 [3]西安测绘研究所,西安710054 [4]北京跟踪与通信技术研究所,北京100094

出　　处：《测绘工程》2025年第3期8-21,30,共15页Engineering of Surveying and Mapping

摘　　要：针对磁暴主相期间电离层扰动影响导航定位精度的问题,分析了经北斗全球电离层延迟修正模型(BDGIM)修正后,新频点(B1C和B2a)的标准单点定位(SPP)精度。文章在9个磁暴事件中,收集了全球32个国际GNSS服务组织(IGS)站实测数据,分析各纬度带内电离层扰动、BDGIM模型修正偏差和SPP精度。结果表明,磁暴主相期间电离层扰动程度,BDGIM模型修正偏差及SPP定位误差与磁暴强度呈正相关,并与测站纬度分布有关(低纬测站变化程度一般大于高纬测站)。磁暴主相期间,B1C频点在强、中和弱磁暴事件中三维定位精度约为6.92 m、4.93 m和3.81 m,B2a频点约为12.76 m、8.12 m和6.88 m,两频点受扰明显,且随磁暴强度下降两频点的SPP结果差异逐渐减小。Aiming to address the issue of varying levels of disturbance in the ionosphere during the main phase of a magnetic storm,which impacts navigation and positioning accuracy,this study analyzes the standard point positioning(SPP)accuracy of the new frequency points(B1C and B2a)following the correction of the Beidou Global Ionospheric Delay Correction Model(BDGIM).In this paper,data from 32 International GNSS Service(IGS)stations worldwide were collected during 9 magnetic storm events.The analysis focused on ionospheric disturbances,BDGIM model correction biases,and SPP accuracy at different latitudes.The results indicate that the degree of ionospheric disturbance,BDGIM model correction deviation,and SPP positioning error during the main phase of the magnetic storm are positively correlated with the intensity of the magnetic storm.These factors are also associated with the latitude distribution of the stations,with the degree of change being generally greater at low-latitude stations compared to high-latitude stations.During the main phase of the magnetic storm,the three-dimensional positioning accuracy of the B1C frequency point in intense,medium,and small magnetic storm events is approximately 6.92 m,4.93 m,and 3.81 m,respectively.For the B2a frequency point,the accuracy is about 12.76 m,8.12 m,and 6.88 m in the same respective storm events.Both frequency points experience significant disturbances,and the gap between the SPP results of the two frequencies gradually narrows as the magnetic storm intensity decreases.

关 键 词：磁暴 北斗全球卫星导航系统 电离层扰动 北斗全球电离层延迟修正模型 标准单点定位 

分 类 号：P228.4[天文地球—大地测量学与测量工程]