A procedure to obtain global solar radiation maps from sunshine duration for Pakistan

Abstract

In this paper we have discussed a procedure to obtain monthly average daily global solar radiation maps for Pakistan from sunshine duration. The data used for analysis include solar radiation data acquired from a few stations equipped with Epply and Kipp Pyranometers. However most of the data is derived indirectly from stations with good and reliable long records of sunshine. A procedure as to how the sunshine data was converted into global solar radiation data is also given in detail. The derived radiation data of five stations having long records of global solar radiation were compared and the difference was found to be less than 10%.