【摘要】 本文介绍了1980年2月16日日全食时,在云南鹤庆县(100°12′E,26°35′N),测量日本ETS-Ⅱ同步卫星136MHz信标法拉弟旋转所得到的一些主要观测结果:(1)电子总含量的日变曲线中出现提前日落现象;(2)F区峰下电离对法拉弟旋转的贡献在日食期间相对变小;(3)没有出现与日食明显有关的声重波扰动。更多还原

【Abstract】 In this paper, results of the TEC measurement by 136 MHz beacon of BTS-Ⅱ during the solar eclipse of Feb. 16, 1980 at He-qing station (100°12"E, 26°35’N) are discussed. The eclipse produces a premature sunset without any bite-out on the TEC curve during the course of the eclipse. However, it is indicated by the non-linear relationship between TEC and NB (the underlying electron content below F2-layer peak) that NB makes relatively less contribution to the measured Faraday rotation around the eclipse maximum. These results imply that for a near sunset eclipse, its dynamic effect on the ionosphere is very marked and its photo-chemical effect is restricted in the lower ionosphere. No gravity wave can be associated immediatly with the eclipse, though quasi-periodic disturbances of very small amplitude can be seen on the residual curve of TEC after the running mean has been removed.更多还原