Progress in Sky Radiance and Luminance Modeling Using Circumsolar Radiation and Sky View Factors
Abstract
The Igawa sky radiance model is enhanced by combining it with a new parameterization of the clear-sky circumsolar radiance to improve the overall radiance prediction within the aureole region. This results in the turbidity-dependent IGI model. Based on this new anisotropic radiance model, a real sky view factor (RSVF) for partially obstructed skies can be used as a basis for realistic calculations, made possible by the SOLARES software.