"We describe a method of simulating measurements of atmospheric radiances and brightness temperatures in wide-bank window channels (at 11 and 3.7 [micro]m) of satellite radiometers. As input the simulation takes vertical profiles of atmospheric temperature and water-vapor mixing ratio, as well as the spectral response functions of the window channels. It models the atmospheric transmittances and integrates the equation of radiative transfer. We demonstrate the use of the method with applications to the Advanced Very High Resolution Radiometer on the TIROS-N satellite."--p.1.