WA-2204 -- The Anisotropy of Clear Sky Diffuse Solar Radiation

Although solar radiation data are now available for many localities, difficulties are sometimes encountered in utilizing these measurements. They consist primarily of total radiation on a horizontal surface and a knowledge of the diffuse component or the total solar radiation incident on an inclined surface is often required. To obtain more accurate methods for calculating the diffuse radiation incident on a surface, especially an inclined surface, it is necessary to make extensive experimental studies of the diffuse radiation component. A new technique for measuring the characteristics of scattered radiation must be used to avoid past intensity distribution assumptions; therefore, the experimental investigation becomes a study of the anisotropy of diffuse solar radiation.