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Pseudo-irradiance fluctuations have been derived from parameterized magnetogram signals. These pseudo-irradiance fluctuations are calibrated by least-squares comparison with ACRIM/SMM data. The resulting Mount Wilson irradiance can be examined for a complete sunspot cycle. The results do not appear to be overly sensitive to the mathematical form of the parameterization.
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CHAPMAN et al. (1986) studied this question.
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