Terrestrial solar spectral data sets

Two data sets are presented that were generated with a rigorous radiative transfer code. One data set is an AM1.5 direct normal spectrum, and the other data set is an AM1.5 global spectrum on a surface tilted 37° from the horizontal towards the sun. These data are updates to data that are nearing acceptance as standards of the American Society of Testing and Materials. An improved extraterrestrial spectrum and other refinements were made to improve the accuracy of these data sets. A preliminary comparison between modeled and measured data is shown, which supports the accuracy of the data sets.