Comparative spectral characteristics of solar radiation relative to air mass values

Abstract

The results of the studies of the spectral characteristics of terrestrial solar radiation carried out based on the calculation model for an index dependence of spectral air mass transmission coefficients relative to the standard solar radiation АМ-1.5 are presented for different air mass values. Spectral transmission coefficients for standard air mass АМ-1.5 relative to extraterrestrial solar radiation AM-0 are obtained by comparing the respective spectral intensities from the published literature. During the theoretical calculations, the limiting value of the air mass (for the solar disk near the horizon) is taken to be large by a factor of 36 than for air mass AM-1.