武昌夜间总电子含量扰动和伴随它的VHF闪烁

武昌夜间总电子含量扰动和伴随它的VHF闪烁 NIGHTTIME PERTURBATIONS IN TOTAL ELECTRON CONTENT AT WUCHANG AND THEIR ASSOCiATiON WITH VHF SCINTILLATIONS 雷源汉 first-author 皮晓青 叶冬英 梁百先 本文利用1983年、1984年和1985年中,每年5—6月份在武昌（geog.,30.5°N,114.6°E;dip lat.,26.5°N）同时获得的日本ETS—Ⅱ卫星的136兆赫信标记录和电离层垂测资料,对夜间总电子含量（TEC）扰动、VHF闪烁和扩展F层进行了分析。结果表明:上述三种现象在夏季夜间有高出现率,呈正相关特性,持续时间常超过5小时,伴随大振幅TEC扰动(峰—峰值≥5.62×10 10 el/m 2 )出现强闪烁现象。在闪烁增至强闪烁水平（SI≥10dB）之前,一般均经历30分钟到1小时以上的由弱逐渐增强的过程,并与TEC扰动增强有关。 In this paper, a statistical analysis is made on nighttime VHF Scintillations、Spread-F and TEC Wave-like perturbations by processing the data of ETS-Ⅱ satellite beacon measurments and ionograms obtained simultaneously at Wuchang（geog, 30.5°N, 114.6°E; dip lat., 26.5°N）during the months of May and June in 1983、1984 and 1985 as well as the months of oct., Nov and Dec. in 1984. It is found that the occurrence of the nighttime VHF scintillation and spread-F is closely associated with the TEC perturbation. All the three kinds of phenomena mentioned above have high occurrence rates in the summer night, and their active levels in the night vary from year to year 1986-03-01 2021-04-01 3