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Remote Sens. 2015, 7(6), 6663-6682;

Validation of CM SAF Surface Solar Radiation Datasets over Finland and Sweden

Finnish Meteorological Institute, P.O. Box 503, FI-00101 Helsinki, Finland
Swedish Meteorological and Hydrological Institute, SE-601 76 Norrköping, Sweden
Deutscher Wetterdienst, 63067 Offenbach, Germany
Author to whom correspondence should be addressed.
Academic Editors: Alexander A. Kokhanovsky and Prasad S. Thenkabail
Received: 10 March 2015 / Revised: 24 April 2015 / Accepted: 8 May 2015 / Published: 26 May 2015
(This article belongs to the Special Issue Remote Sensing of Solar Surface Radiation)
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Accurate determination of the amount of incoming solar radiation at Earth’s surface is important for both climate studies and solar power applications. Satellite-based datasets of solar radiation offer wide spatial and temporal coverage, but careful validation of their quality is a necessary prerequisite for reliable utilization. Here we study the retrieval quality of one polar-orbiting satellite-based dataset (CLARA-A1) and one geostationary satellite-based dataset (SARAH), using in situ observations of solar radiation from the Finnish and Swedish meteorological measurement networks as reference. Our focus is on determining dataset quality over high latitudes as well as evaluating daily mean retrievals, both of which are aspects that have drawn little focus in previous studies. We find that both datasets are generally capable of retrieving the levels and seasonal cycles of solar radiation in Finland and Sweden well, with some limitations. SARAH exhibits a slight negative bias and increased retrieval uncertainty near the coverage edge, but in turn offers better precision (less scatter) in the daily mean retrievals owing to the high sampling rate of geostationary imaging. View Full-Text
Keywords: solar radiation; remote sensing; irradiance; validation solar radiation; remote sensing; irradiance; validation

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Riihelä, A.; Carlund, T.; Trentmann, J.; Müller, R.; Lindfors, A.V. Validation of CM SAF Surface Solar Radiation Datasets over Finland and Sweden. Remote Sens. 2015, 7, 6663-6682.

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