ASTM G173-03(2012)
- Standard Tables for Reference Solar Spectral Irradiances: Direct Normal and Hemispherical on 37° Tilted Surface
- standard by ASTM International, 11/01/2012
- Publisher: ASTM
$32.00$64.00
The 37° slope of the sun-facing tilted surface was chosen to represent the average latitude of the 48 contiguous United States. A wide variety of orientations is possible for exposed surfaces.
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