ILASで観測された大気圏外太陽可視スペクトル(753-784nm)の解析

概要

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Extraterrestrial solar visible spectra(753-784nm)observed by ILAS(Improved Limb Atmospheric Spectrometer) from 5 November, 1996 through 25 June, 1997 were analyzed. The wavelength coverage due to a photodiode array and the absorption channels of Fe Fraunhofer lines were constant during the whole observation period. Then, it can be said that the ILAS provided stable data with respect to wavelength. However, a large time variation was found in the solar emission intensity which should not change. The time variation of the solar emission intensity had a positive correlation with that of temperature measured at the ILAS instrument. From the positive correlation between the solar emission intensity and the temperature, it can be estimated that the large variation was caused by the change of characteristics of the ILAS instrument due to its temperature change. The reason of the temperature change can be explained by the solar irradiance change due to the seasonal change of the distance between the sun and the earth.
社団法人日本気象学会の論文
1998-09-30