Vertical phase and group velocities of internal gravity waves derived from ionograms during the solar eclipse of 24 October 1995

被引：51
|
作者：
Liu, JY [1 ]
Hsiao, CC
Tsai, LC
Liu, CH
Kuo, FS
Lue, HY
Huang, CM
机构：
[1] Natl Cent Univ, Inst Space Sci, Chungli 32054, Taiwan
[2] Natl Cent Univ, Ctr Space & Remote Sensing Res, Chungli 32054, Taiwan
[3] Fu Jen Univ, Dept Phys, Taipei, Taiwan
来源：
JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS | 1998年 / 60卷 / 17期
关键词：
D O I：
10.1016/S1364-6826(98)00103-5
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
A procedure is developed to derive the vertical phase and group velocities of waves from measurements of ionograms. We apply the developed procedure to a sequence of ionograms recorded by the digisonde portable sounder in Taiwan and find numerous waves occuring in the ionosphere during the solar eclipse of 24 October 1995. A detailed analysis of an 87-min period wave shows that the vertical phase velocities of the wave below and above the F1 ledge are about 100 mis in the downward and upward directions, respectively. The associated group velocities below and above the ledge are found to be about 10 m/s in the downward and upward directions, respectively, which indicates that during the solar eclipse the wave source is near the F1-ledge. (C) 1999 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：1679 / 1686
页数：8
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