Frequency of types of sky (Clear-sky, intermediate or cloudy)

Last update: Nov. 2016

This service provides monthly frequencies of three different sky types: sunny, intermediate and cloudy, for a period covering 1996 to 2000, for any site located in Western and Central Europe (source: Satel-Light). Provider: Ecole Nationale des Travaux Publics de l'Etat, France. More information

Linke turbidity factor and maps: there is no restriction of use as long as you mention that you obtained the information from the SoDa Service, and that it is the result of the research published in:

Worldwide Linke turbidity information Remund J., Wald L., Lefèvre M., Ranchin T., Page J. Proceedings of ISES Solar World Congress 2003 - ISES Solar World Congress 2003, Göteborg : Sweden (2003). Full paper can be downloaded at

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