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对2005年8月24日发生的突发型强磁暴(Kp峰值达到9)事件,利用星载大气密度探测器在轨实时的连续探测数据进行了处理和分析.结果表明,此次强磁暴事件期间,引起560 km高度附近大气密度剧烈扰动,并存在着两种响应过程.一种是跟随地磁扰动程度变化的全球性大气密度涨落变化,响应时间滞后6h左右,最大涨落变化比为2.5;另一种为磁暴峰期出现在高纬地区的大气密度突发性跃增,增变比高达5.5.后者存在着区域上的不对称性及时间上的突发性和增幅的差异.此次强磁暴峰期还同时出现了南北半球高纬地区的大气密度跃增双峰.同时还表明这种增变峰可能存在着由高纬向低纬地区迅速推移的现象,在中纬地区推移速度可达15°/h(纬度)左右.
In the event of a sudden strong magnetic storm (Kp peak reaching 9) occurred on August 24, 2005, the on-orbit real-time continuous sounding data of on-board atmospheric density detector were processed and analyzed.The results show that the strong magnetic storm event During this period, there are two kinds of response processes, one is the global atmospheric density fluctuation that follows the variation of geomagnetic disturbance, the response time lags about 6 hours, and the maximum fluctuation change ratio is 2.5 ; The other is sudden increase of atmospheric density in the high latitude area during the peak period of magnetosphere, with the increasing ratio up to 5.5. The latter has the regional asymmetry and the difference in the time of the sudden increase. At the same time, it also shows that there is a phenomenon of rapid increase of atmospheric density from high latitudes to low latitudes in mid-latitude regions Passing speed up to 15 ° / h (latitude) or so.