SRC-780

ASTM G173-03 Reference Spectra Derived from SMARTS v. 2.9.2, tables of wavelength, Etr (extraterrestrial), Global tilt and Direct+circumsolar, 280-4000 nm (as distributed by NLR, fetched 2026-10-10)

ASTM International (standard G173-03), distributed by the National Laboratory of the Rockies ·2003 · T3 government or agency report · VC01

https://www.nlr.gov/grid/zip/astmg173.zip?sfvrsn=1ef05e45_5 (zip); https://www.nlr.gov/grid/astmg173.xls?sfvrsn=d186dec0_1 (xls) the identifier this document is registered under

Published claims resting on this source

CLM-1418 The standard ground sunlight used to test solar cells adds up to about 1,000 watts per square metre, or 1 kilowatt, on a surface tilted towards the sun, under one fixed set of atmospheric conditions. It is a reference value, not what any site receives.

Cite this

energyaperture.com/s/src-780

SRC-780 , recorded 2026-10-10.