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用120°E经度链附近台站电离层垂测资料和一个二维低纬电离层理论模式探讨1995年10月24日日食电离层效应.在日食条件下只考虑日食区计算太阳EUV辐射减少.模式结果显示:(1)日食期间较低高度电离层光食效应显著,电子浓度跟随食分迅速变化,在食甚后浓度减少达到最大。较高高度电离层对日食响应延迟.(2)低纬地区日食日f_0.F_2比控制日低,而h_mF_2比控制日高.在低纬度地区日食带来的影响相对较大·(3)赤道附近h_mF_2食甚后有一突变,出现日食F_1.5层。(4)食甚后海口纬度附近F层受日食影响持久,而f_0F_2在赤道附近出现第2次下降.最后对低纬日食电离层效应的动力学因素进行了初步的讨论.
The ionospheric ionospheric effects of October 24, 1995 were studied using vertical ionospheric vertical data near 120 ° E longitude chain and a two-dimensional low-latitude ionosphere theory model. Only solar eclipse radiation is reduced when solar eclipse conditions are considered. The results of the model show: (1) The effect of solar eclipse on the lower altitude during eclipses is significant. The electron concentration changes rapidly with the change of edible components, and the concentration decreases to the maximum after edible. The response of the higher altitude ionosphere to the solar eclipse was delayed. (2) The solar eclipse day f_0.F_2 in the low latitude region was lower than the control day, while h_mF_2 was higher than the control day. The effects of solar eclipses are relatively large in low latitudes. (3) There is a mutation in the h_mF_2 near the equator, resulting in the F_1.5 layer of solar eclipse. (4) After the eclipse, the F layer near Haikou latitude was enduringly affected by the solar eclipse, while the f_0F_2 appeared the second drop near the equator. Finally, the kinetic factors of ionospheric effect in low latitude solar eclipse are discussed.