CAMS radiation service - overview

Last update: Oct. 2016

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Type of ressource Online solar radiation satellite-derived database
Access FREE: via the SoDa website / automatic (WPS, limited to 5 requests per day)
Parameters All radiation components over the horizontal plane and the Direct Normal component
Spatial coverage
= Meteosat (-66° to +66° both in latitude and longitude)
(Click on the image to magnify)
Temporal coverage 1st Feb. 2004 onwards (available at d-2)
Spatial resolution 3 km at Nadir, approx. 5 km in Europe (see illustration above)
Temporal resolution 15 min
Leadtime available at d-2
Method Heliosat-4
Version ?
Main publication Qu et al. 2016 (others: see publications with keyword "Heliosat-4")



















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No correction in altitude "on the fly" using a post-processing layer as in HelioClim-3.

No possibility to get irradiation values taking into account the shadowing effect due to the far horizon.


NB: The reliability variable is computed with respect to the amount of 1 minute resolution time slots of the current time slot (15 min or 1 hour) without cloud information. In the morning and evening, for very low sun elevation angles, the APOLLO cloud computation gives no results, and this explains the value lower than 1 for the first/last 15 min (or 1 hour) slot in the morning/evening. During the day, it happens from time to time that the cloud information cannot be computed for a given satellite images set and this also creates a lower reliability value (this can be cause by a problem in the satellite images reception or in the APOLLO computing process - CAMS radiation is still a bit "experimental"). Thus, in summary, the reliability value gives an idea of the amount of interpolated data for the time slot of interest.