Abstract
Analytic formulas for the transition energies, intensities, and spectral absorption coefficients of the big (most intense) band systems of H2O and CO2 are presented. Analytic spectral representations of the Chappuis band of O3, three bands of O2, and two bands of CH4 are also given. These inputs in conjunction with band model transmission formulas can be used with spectral functions for the extraterrestrial solar irradiance and Rayleigh and aerosol attenuation for engineering-type calculations of the direct solar spectral irradiance reaching the ground between 0.35 and 4.5 μm. Several algorithms may then be used for estimating the diffuse irradiance.
© 1988 Optical Society of America
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