基于北斗GEO卫星的磁暴期间电离层TEC响应分析

Ionospheric TEC Response Analysis during Magnetic Storms Based on Beidou GEO Satellites

基于亚太地区北斗GEO卫星数据对2017-05发生在中低纬度地区的磁暴现象进行研究,并使用北斗GEO卫星获取的TEC实测数据对全球电离层图的精度进行评估。进一步对磁暴引起的全球电离层TEC变化进行分析发现,电离层TEC对磁暴的响应出现在磁暴主相开始1~4 h之后,最大扰动值达到20 TECu以上。

Using the data of Beidou GEO satellites in the Asia-Pacific region,we study the geomagnetic storm phenomenon that occurred in the middle and low latitude regions in May 2017.The accuracy of the global ionospheric map(GIM)is evaluated using the measured TEC data obtained by Beidou GEO satellites,and the global response of the ionospheric TEC of this geomagnetic storm is further analyzed.It is found that the response of the ionospheric TEC to the geomagnetic storm occurs 1 to 4 hours after the start of the main phase of the geomagnetic storm and the maximal disturbance value could reach 20 TECu.