武昌和广州夜间电离层闪烁的观测

武昌和广州夜间电离层闪烁的观测 NIGHTTIME IONOSPHERIC SCINTILLATIONS OBSERVED AT WUCHANG AND GUANGZHOU 雷源汉 Lei Yuanhan Ma Shuying Ye Dongying Liang Baixian Zeng Qingjin Liang Liping 1 2 3 first-author 马淑英 1 2 3 叶冬英 1 2 3 梁百先 1 2 3 曾庆衿 1 2 3 梁丽屏 1 2 3 武汉大学空间物理系 武汉大学空间物理系 Departmet of Space Physics, Wuhan University Departmet of Space Physics, Wuhan University 广州师范学院 广州师范学院 中国电波传播研究所 中国电波传播研究所 本文利用1986年3月～12月在武昌和广州同时获得的VHF卫星信标记录和电离层垂测资料,对两地的夜间电离层闪烁、TEC波状扰动和扩展F层进行了比较,得到如下结果:（1） 在广州观测到单个等离子体泡或相继出现的电离层电子减损以及与它相关的VHF电离层闪烁;（2） 广州夜间闪烁和区域型扩展F层的出现率均比武昌的大,而频率型扩展F层和TEC波状扰动的出现率均比武昌的小;（3） 在持续时间大于3h,SI>1dB的10次闪烁事件中,广州与武昌两地夜间闪烁开始和结束时间互有迟早。 The nighttime ionospheric scintillation, TEC wave-like perturbation and spread-F simultaneously observed at Wuchang and Guangzhou in the period from March to Dec. 1986 have been compared. The main results are sum-marized as follows. 1. The isolated plasma bubble, the ionospheric electron depletion and associated VHF scintillations were observed at Guangzhou, whereas they were not present at Wuchang. 2. The occurrence of nighttime scintillation and range-type spread-F at Guangzhou was greater than that at Wuchang, but the occurrence of frequency-type spread-F and TEC wave-like perturbation was less than that at Wuchang. 3. It can be seen from the ten scintillation events（with duration longer than 3 hrs., SI greater than 1 dB） selected from May 1986 records that the onset of nighttime scintillation at Guangzhou occurred sometime earlier and sometime later than that at Wu-chang. 电离层闪烁 TEC波状扰动 扩展F层 等离子体泡 电子含量减损 ionospheric scintillation TEC wave-like perturbation spread-F plasma bubble electron depletion 1989-03-01 2021-04-01 3