日食引起的电离层E区不稳定

本文给出了1980年2月16日日全食的高频多卜勒观测结果,发现掩食阶段电离层E区出现三次明显的扰动,生光以后出现两次扰动。利用当时太阳活动区离化源的变化可以解释扰动的主要特征。表明太阳活动区的急剧变化与电离层E区的短期扰动存在很好的对应关系,也就是说,活动区的急剧变化是引起E区不稳定的重要原因之一。

IONOSPHERIC E REGION INSTABILITIES PRODUCED BY SOLAR ECLIPSE

This paper gives the results of observation of the total solar eclipse of Feb. 16. 1980 obtained by using a HP Doppler Sounder. In the period of the solar obscuration three pronounced perturbations of the ionospheric E region were observed and, after the third contact, two perturbations were also observed. The main characteristics of the perturbations can be explained by the variations of the ionizing sources which were located in the solar active region. The highly correlated relations between the prompt variation of the solar active regions and the short-period perturbation of the ionospheric E region are shown. It is concluded that the prompt variation of the solar active regions is one of the important causes in producing the ionospheric E region instabilities.