Solar Spectra

NREL's Electricity, Resources & Building Systems Integration Center provides the following solar spectra in HTML, text and/or MS Excel@ spreadsheet format:



SMARTS:   Simple Model of the Radiative Transfer of Sunshine

SMARTS2 version 2.9.2 is the model used to generate the American Society for Testing and Materials (ASTM) terrestrial reference spectra for ASTM Standard G-173-03 "Standard Tables for Reference Solar Spectral Irradiance at Air Mass 1.5: Direct Normal and Hemispherical for a 37 Tilted Surface".


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