Angular distribution and interception of diffuse solar radiation
Steven, M.D. (1977) Angular distribution and interception of diffuse solar radiation. PhD thesis, University of Nottingham.
The estimation of the irradiance of sloping surfaces from standard meteorological measurements requires knowledge of the geometrical distribution of scattered radiation from the sky. Measurements of the radiance distribution of cloudless skies were made with a Linke-Feussner actinometer. When measurements of sky radiance N were expressed relative to the diffuse irradiance D of a horizontal surface, the angular distributions of N/D were remarkably independent of atmospheric turbidity. Standard distributions of N/D, drawn up for different solar zenith angles, were used to estimate the diffuse irradiance of slopes under cloudless skies.
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