A time series of
daily magnetograms and empirical models of the thermal structure of magnetic features (sunspots, faculae) are combined to reconstruct total (and spectral) irradiance from 1996 to 2002.
Not exact matches
For periods after 1974, they calculate TSI values based on
daily measurements of solar
magnetograms.
Thanks to the new SDO satellite we are able to see this process in action via a
magnetogram animation they provide
daily.