On the calculation of spurious velocity signal produced by atmospheric differential extinction in whole-disk oscillation measurements |
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Authors: | Sh Ehgamberdiev I Khamitov |
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Affiliation: | (1) Astronomical Institute of the Uzbek Academy of Sciences, Tashkent, U.S.S.R. |
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Abstract: | The systematic diurnal signal drift in full-disk solar oscillation measurements has been calculated taking into account differential rotation, the inclination of the rotational axis of the Sun with respect to the picture plane, the limb-darkening function and a realistic estimation of the sky transparency, slightly variable during the day. An illustration of this method on the Kumbel (U.S.S.R.) IRIS data is presented and discussed. |
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