Parameterization of Shortwave Clear-sky Global Radiation Observations at a Tropical Rural Site
The present study is aimed at exploring the clear-sky shortwave global-horizontal radiation measurements from a pyranometer at Gadanki. The clear-sky global radiation (G) as a function of solar zenith angle (Ө) will be parameterized as: G = a.(cosӨ)b, where a and b are coefficients. The significance and variability of these coefficients will be studied. Further, we will evaluate the online McClear model simulations of clear-sky global radiation at Gadanki with the clear-sky measurements on several clear days.