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首页> 美国政府科技报告 >The Ionospheric Response to Solar Flares. I. Effects of Approximations of Solar Flare EUV Fluxes
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The Ionospheric Response to Solar Flares. I. Effects of Approximations of Solar Flare EUV Fluxes

机译：电离层对太阳耀斑的响应。 I.太阳耀斑EUV通量近似的影响

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SOLRAD and many other satellite systems have provided a large data base showing the time-dependent behavior of broad and band solar fluxes in the X-ray and EUV spectral regions. These bands are broad in the sense that one band may contain many ionospherically important spectral lines. We present results of tests performed to determine how this information can be best be used to predict the effects of a solar flare on the ionosphere. Our approach has been to first adopt a model of the spectral line and continuum enhancements based on a synthesis of many types of flare observations. This detailed spectral model is used in a time-dependent ionosphere model to calculate the response of the electron and ion density profiles. Then the spectral model is mathematically filtered to show how it would appear to the SOLRAD EUV detectors, and this degraded information is used in the ionosphere model. Comparison of the two ionosphere shows that the two spectra produces changes in the total electron content in the ionosphere that differ by only a few percent. More significant changes which occur in the individual species densities are described. (Author)

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