The document summarizes a study modeling daily net shortwave radiation (NSSR) over rugged surfaces using MODIS atmospheric products. It presents the background of the study, data and methodology used, results and discussion of model validation showing R-squared values between 0.71-0.93 for different locations, and sources of error. It concludes that terrain is the main factor attenuating NSSR under clear sky, while clouds play a greater role under cloudy sky, and moderately accurate NSSR maps over rugged surfaces can be produced using MODIS data.