Evaluation of Solar Radiation Prediction Models in North America

Solar radiation data at the earth's surface ( R s , MJ m −2 d −1 ) are not typically recorded at weather stations, but they may be predicted from other meteorological measurements. For one location, Keiser, AR, we developed an empirical equation for predicting R s . The mechanistic models of Hargreaves–Samani (HS) and two forms of the Bristow–Campbell model, described by Thornton and Running (TR) and Weiss et al. (WS), were also evaluated for …