Summerschool and Workshop on Motions in the Solar Atmosphere, KARNTEN, Avusturya, 1 - 12 Eylül 1997, cilt.239, ss.213-217
A modelling of the sunspot deficit in solar irradiance measurements in 3 spectral wavelengths and the total flux as observed by the VIRGO experiment on SOHO has been performed for several periods of 1996 in a pixel-by-pixel manner using high resolution photoheliograms taken at Kanzelhohe Observatory. The calculation of the irradiance contributions of the other features of active regions is in progress.