Assessment and recalibration of the Heliosat-2 method in global horizontal irradiance modeling over the desert environment of the UAE

摘要: Abstract Remote estimation of global horizontal irradiance ( GHI ) by Heliosat-2 model has been benchmarked against ground-based measurements in different locations. The obtained results have shown that the level agreement between and model-based values are location dependent. To our knowledge no similar studies carried out over Arabian Peninsula. unique climatic condition Peninsula, characterized high concentrations airborne dust particles humidity makes region a particularly interesting case. In this study method was used to derive ground surface United Arab Emirates. Inputs were monthly Linke turbidity factor normalized an air mass 2 cloud index derived from SEVIRI sensor onboard European satellite Meteosat. network seven stations distributed across UAE. A SEVIRI-based technique developed high-resolution visible channels. Ground collected four inland for period ranging mid-2007 mid-2010. show underestimates . root mean square error (RMSE) bias (MBE) ranged 16.3% 18.5% −13.6% −15.8%, respectively. constant observed modeled measured throughout stations. correct bias, empirical equation estimate clear sky diffuse DHI recalibrated. With new equation, modified becomes more adapted desert dusty environments such as By applying RMSE MBE dropped 9.5–10.3% −1.2 +0.8%,