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    题名: Vertical phase and group velocities of internal gravity waves derived from ionograms during the solar eclipse of 24 October 1995
    作者: Liu,JY;Hsiao,CC;Tsai,LC;Liu,CH;Kuo,FS;Lue,HY;Huang,CM
    贡献者: 太空科學研究所
    关键词: ANOMALY CREST REGION;IONOSPHERIC DISTURBANCES;EAST-ASIA;HEIGHT
    日期: 1998
    上传时间: 2010-06-29 18:39:11 (UTC+8)
    出版者: 中央大學
    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.
    關聯: JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS
    显示于类别:[太空科學研究所 ] 期刊論文

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