Satellites can provide continuous monitoring of important aspects of the Earth's climate. The Geostationary Operational Environmental Satellite (GOES) provides half-hourly temporal resolution coverage of the Continental US (CONUS) and thus is a prime candidate to use for climate monitoring; however the sensors are narrowband and therefore cannot directly measure the broadband fluxes required for such monitoring. Broadband fluxes have been derived based on comparisons of broadband CERES (Clouds and the Earth's Radiant Energy Budget) fluxes from the polar-orbiting Terra, with the narrowband fluxes of GOES. However, since these comparisons are only possible on a twice-daily basis, further information from GERB (Geostationery Earth Radiation Budget) broadband sensors on board another geostationery satellite, MSG, viewing Europe, are used to supplement the narrowband-broadband conversion throughout the entire day. To evaluate these efforts, the resulting GOES-derived broadband fluxes will be compared to modelled fluxes calculated from Fu-Liou radiation code.