IAO radiative model has been designed to calculate the atmospheric transfer of the thermal and solar radiation with accounting of aerosol and molecular scattering and gaseous absorption for arbitrary atmospheric conditions. It includes:

1. The effective absorption coefficient and transmission function calculation by expansion in an exponential series.
2. Shortwave radiation intensities and fluxes calculation by discrete ordinate method DISORT at the atmosphere top and bottom.
3. The thermal radiation fluxes and cooling rates at the user-specified atmospheric levels.