On an overcast day the directional distribution of
Chapter 12, Problem 12.11(choose chapter or problem)
On an overcast day the directional distribution of thesolar radiation incident on the earths surface may beapproximated by an expression of the form Ii?Incos ,where In?80 W/m2?sr is the total intensity of radiationdirected normal to the surface and is the zenith angle.What is the solar irradiation at the earths surface?
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