磁暴期间北斗GEO卫星电离层异常研究  

Study on Ionospheric Anomaly During Geomagnetic Storm by Beidou GEO Satellites

作　　者：明飞雄 马锦山 MING Feixiong;MA Jinshan(Chongqing Institute of Surveying and Mapping,MNR,Chongqing 401120,China;Land Surveying and Planning Institute Co.,Ltd.,Xining 810000,China)

机构地区：[1]自然资源部重庆测绘院,重庆401120 [2]西宁市国土勘测规划研究院有限公司,青海西宁810000

出　　处：《地理空间信息》2023年第8期100-103,共4页Geospatial Information

基　　金：湖北省面上基金资助项目(2020CFB603);湖北珞珈实验室开放基金资助项目(220100046)。

摘　　要：北斗GEO卫星可获取准固定穿刺点处的电离层TEC时变序列。基于北斗GEO卫星观测数据解算电离层TEC及相应ROTI指数,并分析2017年9月磁暴期间电离层TEC异常变化特征。实验结果表明,在磁暴发生前后,GEO卫星解算得到的电离层TEC值均出现了明显增强,且LHAZ测站处的TEC最大值出现在磁暴前一天。同时,在磁暴主相阶段2个测站多颗GEO卫星解算得到的电离层ROTI指数均探测到了异常变化,表明在此次磁暴期间发生了明显的电离层闪烁事件。实验结果验证了北斗GEO卫星监测电离层时空变化的可行性,为电离层研究提供了更丰富的监测手段。Beidou GEO satellites can obtain the ionospheric TEC time-varying sequence at the quasi fixed puncture point.Based on the observation data of Beidou GEO satellites,we calculated ionospheric TEC and ROTI index and analyzed the change characteristics of ionosphericanomalyduring the geomagnetic storm in September 2017.The results show that ionospheric TEC values calculated by GEO satellites are significantly enhanced,and the maximum TEC values at LHAZ station appear on the day before the geomagnetic storm.Meanwhile,abnormal changes are detected in the ionospheric ROTI index calculated by GEO satellites at two stations during the main phase of storm,indicating that an obvious ionospheric scintillation event occurred during the storm.The results verify the feasibility of Beidou GEO satellite to monitor the ionosphere spatio-temporal changes,which can provide moremonitoring methods for ionosphere research.

关 键 词：北斗 GEO卫星 电离层TEC ROTI 电离层闪烁 

分 类 号：P228[天文地球—大地测量学与测量工程]