1984年4月24日大太阳耀斑爆发对电离层电子总含量的影响

本文给出1984年4月24日2356UT太阳耀斑爆发期间在新乡和重庆两地利用法拉第技术接收日本同步卫星ETS-Ⅱ的甚高频信号所得到的电离层电子总含量的异常变化。两站在耀斑爆发期间的三分半钟内同时观测到电离层电子总含量的突然急剧增加。它们的增量分别为9.4×1016和14.3×1016ele/m2.本文还将偏振仪所观测到的现象与电离层垂测记录及甚低频锁相接收机所观测到的记录作了比较。分析的结果表明,大太阳耀斑期间不仅D层的电子浓度大大增加,而且F层的电子浓度也显着增加,后者是这次总含量剧增的主要部分。 

The Influence of the Great Solar Flare of 24 April 1984 on the Ionospheric Total Electron Content

Sudden increases of the ionospheric total electron content (TEC) during the great solar flare burst near 2356 UTon 24 April 1984 were simultaneously observed at Xin-xiang (35.3°N, 113.9°E) and Chongqing(29.5°N, 106.4°E) by means of Faraday rotation measurements of the VHFsignals from the Japanese geostationary satellite ETS-II. These sudden increases lasted three and a half minutes, and the values of TECincreases at Xinxiang and Chongqing reached 9.4×1016 and 14.3×1016 ele./m2 respectively. The phenomenon recorded by polarimeters is compared with results from neighbouring ionosondes and VLF phase-locked receiver. The analysis shows that there are appreciable increases of electron density both in the ionospheric D-region and the F-region and the latter is the main part of the sharp TEC increases.