One of the goals of the Climate Monitoring Satellite Application Facility (CM-SAF) is to provide consistent cloud and radiation parameters in high spatial resolution for an area that covers at least Europe and part of the North Atlantic Ocean. Daily means, monthly means and monthly mean diurnal cycles are to be provided. At the Top Of the Atmosphere (TOA) the three radiative ux components of incoming solar radiation, reected solar radiation and emitted thermal radiation will be given.In this paper the method used within the CM SAF facility for the homogenisation of the TOA reected solar uxes is described, and results using currently available input data are shown. As input data reected solar uxes from METEOSAT and CERES (Clouds and the Earths Radiant Energy System) are used. Once MSG (METEOSAT Second Generation) uxes will become available, they will replace the METEOSAT uxes. The homogenisation consists of the detection and the removal of the systematic dependencies of the ux estimates on scene type and viewing angles. For a given scene type and solar zenith angle, the mean of the CERES measurements over all viewing zenith angles and relative azimuths is used as the reference for the homogenisation.