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GPS detection of the instantaneous response of the global ionosphere to strong magnetic storms with sudden commencement

机译:GPS检测全球电离层对强磁风暴的瞬间响应突然开始

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摘要

Using a new technology for global GPS detection of ionospheric disturbances, GLOBDET, it has been established that a drastic increase in the time derivative of the magnetic field strength during magnetic storms is accompanied by an almost simultaneous decrease in mid-latitude total electron content on the entire dayside. The corresponding correlation coefficient is not below -0.8; the delay with respect to the time of a magnetic storm sudden commencement is about 3-10 min. This is most pronounced for magnetic storms with a well-marked sudden storm commencement. The sudden storm commencements presented in the paper were observed during the initial storm phase. The analysis reported here was made for a set of from 90 to 300 GPS stations for 10 days in 1998-2001 with a different level of geomagnetic activity (Dst from -6 nT to -295 nT, and K p from 0 to 9). The «simultaneous» total electron content response for the events under consideration was 0.1-0.4 TECU, and the travel velocity of the disturbance from the dayside to the nightside was in the order of 10-20 km/s. Results obtained are consistent with earlier ionospheric parameter measurements obtained using high temporal resolution methods.
机译:使用新技术进行全局GPS检测电离层扰动,Globdet,已经确定磁风暴期间磁场强度衍生的衍生衍生的急剧增加伴随着中纬度总电子含量的几乎同时降低整天。相应的相关系数不低于-0.8;关于磁风暴突然开始的时间的延迟约为3-10分钟。这对具有良好标记的突然风暴开始的磁场最为明显。在初始风暴阶段期间观察本文介绍的突然风暴开始。这里报告的分析是在1998 - 2001年的90至300 GPS站的一组10天,具有不同水平的地磁活动水平(DST从-6 NT至-295 NT,以及k P轴0至9)。 «同时»所考虑的事件的总电子含量响应为0.1-0.4 TECU,并且从夜间的STENEIDE的干扰的行进速度约为10-20km / s。获得的结果与使用高时间分辨率方法获得的早期电离层参数测量一致。

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