Web Services

Last update: Apr. 2017

The SoDa Service contains several resources and its content is evolving as additional resources (databases, algorithms, end-user applications) are populating the SoDa Service. Categories:

License terms for Copernicus services, SoDa Products and services available for free

[Providers, outside the Consortium SoDa, are using the SoDa service to disseminate information on solar radiation. cf providers from "about-us/concept"]

Radiation

HelioClim-3
Feb. 2004 => 2017 (real time)

HelioClim-3 time series of the radiation components over a horizontal, fix-tilted and normal plane for the actual weather conditions as well as clear-sky conditions. Geographical coverage corresponds to the Meteosat satellite field of view, i.e. covers Europe, Africa, Atlantic Ocean, Middle East. Spatial resolution is 3 km at Nadir, and approx. 4-5 km at 45° of latitude. Data are available with a time step ranging from 15 min to 1 month. The time coverage is from Feb. 2004 up to current day-2 for HC3v5, and up to day-1 for HC3v4.

- For Pay  , limited to registered users -

 

HelioClim-3
Feb. 2004 - 2005

Idem than above, except that the temporal coverage of data is limited to Feb. 2004 up to Dec. 2005.

HelioClim-3 real time and forecasts

Provides 15 min and hourly HelioClim-3 (version 4) time series for the current day and for d+1.

Current day: the service is updated in real time from sunrise with the latest upcoming Meteosat image, to provide HelioClim-3v4 time series. It is completed until the end of the current day with a persistence model.
Next day: the Similarity Forecast model performs a statistical investigation of the HelioClim-3v4 database to find the most similar day in the database to provide an estimation of the radiation for the coming day.

NB: HelioClim-3v5 can not be available in real time and forecast since the data are only available at d-2.

CAMS radiation service

CAMS radiation time series of Global, Direct, and Diffuse Irradiations on horizontal surface, and Direct Irradiation on normal plane (DNI) for the actual weather conditions as well as for clear-sky conditions. The geographical coverage is Europe, Africa, Atlantic Ocean, Middle East. Spatial resolution is 3 km at Nadir, and approx. 4-5 km at 45° of latitude. Time steps ranging from 15 min to 1 month. From Feb. 2004 up to current day-2.

CAMS McClear

CAMS McClear time series ofGlobal, Direct, and Diffuse Irradiations on horizontal surface, and Direct Irradiation on normal plane (DNI) under clear sky conditions. Available worldwide. Time step ranging from 1 min to 1 month. From Jan. 2004 up to current day-2.

HelioClim-1

This service provides time series of HelioClim-1 monthly, weekly and daily Global Solar Irradiation values over a horizontal plane, as well as monthly irradiation received by a plane normal to sun rays. The geographical coverage corresponds to the Meteosat satellite  field of view, i.e. covers Europe, Africa, Atlantic Ocean, Middle East. The spatial resolution is approx. 20 km. The time coverage of data is from 1985 to 2005.

HelioClim-1
UV

This service provides time series of HelioClim-1 daily UV-A, UV-B and Erythemal Daily Irradiation values over a horizontal plane. The geographical coverage corresponds to the Meteosat satellite  field of view, i.e. covers Europe, Africa, Atlantic Ocean, Middle East. The spatial resolution is approx. 20 km. The time coverage of data is from 1985 to 2005.

NASA-SSE

Surface meteorology and Solar Energy service provides time series of daily Global Horizontal Irradiation values. Available worldwide, with a spatial resolution of 1° (approx. 100 km). Time coverage of data is from July 1983 to June 2005.

Guidelines for UV exposure

Daily values of UV exposure computed from HelioClim-1 solar radiation database, which implements the International Commission on Non-Ionizing Radiation Protection (ICNIRP) guidelines on protection against UV radiation regarding exposure of the skin.

E0 and ToA

Daily values of Extraterrestrial irradiance (E0), i.e. received by a plane normal to sun rays and outside the atmosphere, and Top of Atmosphere (ToA) radiation, i.e. received by a horizontal surface and outside the atmosphere. E0, in W/m², depends on the sun-earth distance, and thus on the date. ToA is given in irradiance (W/m²) and irradiation (J/m², Wh/m²).

 

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Altitude

Altitude of a point

This Web service, provided by MINES ParisTech, returns the altitude value in meters from the Shuttle Radar Topography Mission (SRTM) of NASA (USA), from GTOPO30" and from TerrainBase5'.

Horizon from SRTM

(Coming soon)

SRTM in a tile

This service provides tiles of surface elevation from the Shuttle Radar Topography Mission (SRTM) of NASA (USA). Please note that it is listed in the catalog www.webservice-energy.org. Click on "more informations" to visit the website of the catalog.

 

 

Astronomy

Solar Geometry 2
SG2

Solar Geometry 2 (SG2) is the second generation of library for computing the relative position of the sun and the earth made by the MINES ParisTech. Valid over the time period 1980-2030, the algorithm is 20 times faster than the well-know SPA algorithm (Solar Position Algorithm), with an accuracy order of approx. 0.005°. The code is available both in C langage and in Matlab.

Solar Geometry 1
SG1

Daily values of solar declination, distance Earth to Sun, difference true and mean solar time, daylength, sunrise and sunset computed with the Solar Geometry 1 library.

 

Atmosphere

APOLLO Cloud Statistics

This Web service, granted by ESA and provided by both DLR and TRANSVALOR, provides reports in pdf format with the APOLLO cloud physical parameters statistics on a limited number of sites, as a further help in the characterization of a solar site.

The August 2015 description of the product and statistics has been improved and enriched with examples and feedback from our user's trials. It describes also the two products which are available "on demand" from Transvalor.

 

 

 

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Meteorological data

MERRA

The Modern-Era Retrospective analysis for Research and Applications, Version 2 (MERRA-2) Web service, available worldwide, delivers time series of Temperature (at 2 m), Relative Humidity (at 2 m), Pressure (at 2 m), Wind speed and direction (at 10 m), with a time step of 1 hour, 1 day and 1 month, and a spatial resolution of approx. 50 km. The data are available since Jan. 1980 and are regularly updated with approx. one month of delay.

GFS archives
GFS forecasts

EMPClimate

This service, provided by MINES ParisTech, offers access to climatological database of monthly and yearly means of solar irradiance (downwelling shortwave irradiance), daily minima, maxima and means of air temperature at 2 m, and daily minima, maxima and means of relative humidity at 2 m, averaged over the period 1990-2004 (15 years). The data are available worldwide.

This database has been created by data fusion techniques applied to satellite data, meteorological re-analyses from NCEP / NCAR (USA) and orography.

 

Typical Years

Frequency of types of sky 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
Monthly Average of Air Temperature Provider: Meteotest
Normal Year of Global Radiation and Air Temperature

Provider: Meteotest
Outputs: hourly or monthly GHI and/or GTI in kWh/m², and T°C in C°
Worldwide, mainly based on ground measurements (no spatial resolution)

 

 

   
Typical Values for UV Irradiation

Provider: Meteotest
Outputs: monthly, daily and hourly values for UV data Global and diffuse horizontal irradiance (irradiation) for UV-A, UV-B, erythemal.
Worldwide. Typical values based on climatological data.

 

Validation

Validate your data

This service assesses the quality of measurements of daily global irradiation or daily means of global irradiance acquired by a ground station. Measurements are checked against models resulting in a measure of plausibility.

 Irradiation validation report

This online service performs an online validation of the daily Global Horizontal Irradiation data of three satellite-based resources versus the measurements of 31 stations of the WRDC network. The satellite-based resources are HelioClim-3 version 4, HelioClim-3 version 5 and MACC-RAD. Select the temporal of you choice in the temporal coverage available for each station, and then retrieve a full report in html format of quality assessment.