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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/27688


    Title: The solar flare radiation responsible for sudden frequency deviation and geomagnetic fluctuation
    Authors: Liu,JY;Chiu,CS;Lin,CH
    Contributors: 太空及遙測研究中心
    Keywords: VARIABILITY;CURRENTS;FIELD
    Date: 1996
    Issue Date: 2010-06-29 18:52:16 (UTC+8)
    Publisher: 中央大學
    Abstract: Data recorded by the Geostationary Operational Environmental Satellites, frequency deviations derived from a CW-HF Doppler sounding system, and geomagnetic field strength variations obtained from ground-based magnetometers were analyzed to study the ionospheric and geomagnetic solar flare effects. A model of flare radiation was constructed from synthetic flux intensities and satellite X ray observations, and corresponding ionospheric frequency deviation and electron density at various altitudes were calculated. The evolution of solar EUV and X ray radiation and associated maximum values responsible fur frequency deviation and geomagnetic field strength fur various flux intensities of the excess solar radiation were studied in detail. It was found that during a solar flare, not only the magnitude of solar radiation, but also the rate of its change dramatically affects the maximum ionospheric frequency deviation. However, the results confirmed that only the intensity of solar radiation determines the magnitude of geomagnetic field strength.
    Relation: JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
    Appears in Collections:[太空及遙測研究中心] 期刊論文

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