Meteosat Surface Solar Irradiance

Operational Near real time product

Estimation of the solar irradiance reaching the Earth surface derived from the 0.6 µm visible channel of SEVIRI on board the geostationary satellite Meteosat.
The product is remapped onto a 0.05° regular grid and expressed in W/m2.

Acronym : MET SSI
Product navigator reference :


OSI SAF producer : Météo-France
Identifier : OSI-304-a
Acronym for EDC (APNM) : ODDLISSI
Citation : See at bottom
Processing level : L3
Satellite input : Meteosat-10/SEVIRI
Other input : NA
Temporal sampling : 24 per day + 1 per day
Timeliness : ? The timeliness is the time elapsing from the sensing time of the last contributing file to the product dissemination to users. It is similar to the latency. 2 h
Spatial coverage : East Atlantic, West Indian: 60N-60S 60W-60E
Spatial sampling : 0.05° Lat-Lon
File Formats : LML FTP Server (NetCDF4), EDC (NetCDF4), EUMETCast (NetCDF4)
Characteristics & methods : Algorithm is a physical parametrization applied separately to every pixel of a satellite image to derive an instantaneous field of the Surface Solar Irradiance. The hourly product is interpolated at rounded UT hours, by a pixel dependant temporal interpolation between two consecutive satellite images.
The value in the daily product is the integration of all the hourly values in the UT day.
Data Access

OSI SAF FTP (main, full archive)

Directory: ifremer/cersat/projects/osisaf/radflux/l3/east_atlantic_west_indian/

OSI SAF backup FTP (last 7 days)

Directory: ifremer/cersat/projects/osisaf/radflux/l3/east_atlantic_west_indian/

EUMETSAT Multicast

Accuracy Requirements
Target accuracy : monthly (TBC) relative absolute mean difference: 10%, monthly relative standard deviation :30%
Verification/validation method : routine comparison with pyranometer measurements
Applications and users
Usage : Ocean atmosphere studies.
Declared operational / released since :
On EUMETCast since :
On EDC since :
On FTP server since :
Expected date for operational/released :
First date :
Full series temporal coverage : 2011-onwards
Detailed history :

The product series is operational since 2011:

  • version OSI-304 from 2011 to 20/02/2018
  • version OSI-304-a from 20/02/2018 onwards
Citation : OSI SAF Meteosat Surface Solar Irradiance 2018-onwards, OSI-304-a. EUMETSAT Ocean and Sea Ice Satellite Application Facility. Data extracted from [distributor/distribution mean]: ([extracted period],) ([extracted domains],) accessed [download date]

The content within square brackets "[…]" is to be replaced with whatever distributor, period, domain or download date is relevant to the data being used. The "extracted period" and "extracted domains" are only needed if a subset of the data is being used.
Suggestions for "distributor/distribution mean": OSI SAF FTP server/the EUMETSAT Data Centre/EUMETCast/name and URL of a redistributor...
  • From 19/01/2021, processed with a new chain, using cloud products from NWC SAF software v2018

  • Replaced OSI-304 based on Meteosat-10 input on 20 February 2018

  • EUMETSAT product navigator reference for daily product : EO:EUM:DAT:MSG:OSI-304-D

  • Using cloud type from NWC SAF software v2016

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