diffuse sky radiation

[10.5.2.3]

NOTE: This definition was changed in RP-16-17 Addendum 2. Deletions have a strike-through. New text is bold.

That part of solar radiation that reaches the Earth as a result of being scattered by air molecules, aerosol particles, cloud particles, or other particles.*

That part of solar radiation that reaches the Earth as a result of being scattered by air molecules, moisture, or other aerosol particles in the atmosphere.

*International Lighting Vocabulary, CIE S 017/E:2011. Vienna: International Commission on Illumination; 2011.

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