摘要
2015年6月22日发生了一次特大地磁暴。磁暴期间，在我国中纬度地区进行了一次电离层垂直和斜向返回联合探测。文章利用电离图反演和短波射线追踪技术对磁暴期间的电离层扰动情况作了分析。结果表明在磁暴的恢复相前期出现了电离层负相暴扰动，扰动幅度先减小后增大，扰动幅度最大出现在当地时间下午四点。电离层负相暴扰动导致电离层先上升．后下降．导致高频天波超视距雷达最大可用频率降低．距离覆盖盲区增大。
An intense geomagnetic storm occurred on 22 June, 2015. A vertical and oblique backscattering association sounding was carried out in middle-latitudes of China. Ionogram inversion and short-wave ray-tracing technique were utilized to analysis the ionospheric disturbance during the geomagnetic storm in this paper. The results of the data analysis show that a negative phase ionospheric storm is occurred during the early recovery phase of the geomagnetic storm, that the ionospheric disturbance amplitude decreases firstly and then increases, and that the maximum disturbance occurres at 04：00 pm local time. The ionosphere raises before falls because of the negative phase ionospheric storm. The negative phase ionospheric storm leads to the decrease of maximum usable frequency （MUF） and the increase in distance coverage blind area of the high-frequency sky-wave over- the-horizon radar （HFSWOTHR）.
出处
《电光系统》
2016年第2期13-17,共5页
Electronic and Electro-optical Systems
关键词
电离层探测
高频天波超视距雷达
地磁暴
射线追踪
电离图反演
Ionospheric Sounding
High-frequency Sky-wave Over-the-horizon Radar
Geomagnetic Storm
Ray Tracing
Ionogram Inversion
