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. 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.
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
Processing level : L3
Satellite input : Meteosat-11/SEVIRI
Other input : NA
Frequency : 24 per day + 1 per day
Timeliness : 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 : W/m². Physical method
Data Access
Main Diffusion Means : LML FTP server (hosted by Ifremer) :
backup LML FTP server (last 7 days) :
Other means :


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 :
  • 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

New ticket helpdesk