The Surface Radiation Budget Project. The SRB data sets contain global averages of surface longwave (infrared or heat) and shortwave (solar or light) radiative properties, cloud amount, and meteorology. SRB combines long-term satellite measurements of visible and infrared images of the Earth with weather information provided by computer models to estimate the surface radiation fluxes. The radiative energy exchanged at the surface is very important for heating and cooling of the land and ocean surfaces