PALMER, D. ... et al, 2018. Satellite or ground-based measurements for production of site specific hourly irradiance data: Which is most accurate and where?. Solar Energy, 165, pp.240-255.
Site-specific satellite-derived hourly global horizontal irradiance is compared with that obtained from extrapolation and interpolation of values measured by ground-based weather stations. A national assessment of three satellite models and two ground-based techniques is described. A number of physiographic factors are examined to allow identification of the optimal resource. The chief influences are determined as: factors associated with latitude; terrain ruggedness; and weather station clustering/density. Whilst these factors act in combination, weather station density was found to be fundamental for a country like the UK, with its ever-changing weather. The decision between satellite and ground-based irradiance data based on accuracy is not straightforward. It depends on the exactitude of the selected satellite model and the concentration of pyranometric stations.
This paper was published in the journal Solar Energy and the definitive published version is available at https://doi.org/10.1016/j.solener.2018.03.029.
This work has been conducted as part of the research project ‘Joint UK-India Clean Energy Centre (JUICE)’ which is funded by the RCUK's Energy Programme (contract no: EP/P003605/1).