摘要：In this paper the ionospheric effects of the solar eclipse of October 24, 1995 were investigated using a two-dimensional ionospheric theoretical model. In the calculations, only the depression of solar EUV fluxes during the course of the eclipse was taken into account under the solar eclipse condition. (1) During the period of the eclipse, the optical effects were quite clear at the lower altitudes of the ionosphere, while the responses to the eclipse were weaker, delayed, but longer in duration at the higher altitudes. (2) The lower the magnetic latitude, the stronger was the response to the solar eclipse. In low latitude regions, the values of f 0 F 2 on the eclipse day were lower compared with those under the control conditions, whereas hm F 2 values were higher. (3) Near the magnetic equator there was a sharp transition in h m F 2 after the maximum phase of obscuration, and a solar F 1.5 layer appeared below the normal peak height of the F 2 layer. (4) After the maximum phase, the effects of the eclipse lasted longer near Hainan, and a secondary depression occurred over the magnetic equator. The mechanisms that may be responsible for the eclipse-caused effects are discussed here.
关键词：Solar eclipse; Ionospheric effects of the solar eclipse; Low latitude ionosphere; Ionospheric theoretical model;
