The file wehrli85.txt in this directory is an unmodified copy of the 1985 Wehrli standard extraterrestrial solar
irradiance spectrum as distributed by the National Laboratory of the Rockies (formerly the National Renewable
Energy Laboratory) at https://www.nlr.gov/grid/solar-resource/spectra-wehrli
(file https://www.nlr.gov/media/docs/libraries/grid/wehrli85.txt?sfvrsn=dc2409b_1). It is distributed subject to
the following notice, reproduced from https://www.nlr.gov/disclaimer (retrieved 2026-09-27):

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