Version HelioClim-3 - Solar Radiation Database Software
HelioClim-3 is a satellite-derived solar radiation database. It exploits the Heliosat-2 method to estimates a 'cloud index', based on the analysis of the 15 minute Meteosat Second Generation (MSG) satellite images in the visible band.
Our most advanced HC3 version 5 applies then this 'cloud index' to a 'clearsky model' computed from a precise atmosphere description in terms of water vapor, aerosols and ozone, name McClear (~3 hours and ~40 km resolution, worldwide).
Our database is organized to deliver very fast time series of irradiation, from Feb 1st 2004 up to yesterday.
Data are accessible either using the SoDa web portal or via automatic wget commands.
In addition, we enhance the native spatial resolution of MSG, by computing inside a MSG pixel the irradiation variation due to the altitude and to the shadow of the horizon for a specific point. The relief used to compute the shadowing is obtained from the SRTM digital surface model (DSM), with a spatial resolution of ~100m.
This service has been evaluated to check the quality of the output data. We compared HelioClim-3 solar radiation values with in-situ measurements from pyranometers: validation results.
The data is available on-demand and also through different subscriptions depending on your need:
The price of our standard annual subscriptions depends on:
- the number of time series you needs to retrieve every day/month
- the radiation components (Global Horizontal Irradiation component only or other ones)
- The time step of retrieval (from 1 min up to 1 month)
The difference with a standard annual subscription is:
- Automatic access only
- the number of automatic requests is limited to 100 per day (or per month depending on your subscription)
The price is 25% off compared to standard subscriptions.
Automatic subscription per request
If the number of requests is below 30 per day (or per month for monthly values), we recommend you to opt for an annual subscription per request.
The access to the data is automatic.
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