Meteosat Downward Longwave Irradiance

IDENTIFICATION
DescriptionEstimation of the downward longwave irradiance reaching the Earth surface derived from SEVIRI data on board the geostationary satellite Meteosat. Algorithm is a bulk parametrization that uses NWP model outputs to calculate a clear sky Downward Longwave Irradiance (DLI), corrected according to satellite derived cloud information. 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.
Product typeNear real time productThumbnail
StatusOperational
IdentifierOSI-303-a
AcronymMET DLI
Acronym for EDC (APNM)OSIDDLI
Product navigator referenceEO:EUM:DAT:MSG:OSI-303-H
CHARACTERISTICS
Processing levelL3
Satellite inputMeteosat-11/SEVIRI
Other inputECMWF outputs (temperature and humidity profiles), cloud classification
Frequency24 per day + 1 per day
Timeliness2 h
Spatial coverageEast Atlantic, West Indian: 60N-60S 60W-60E
Spatial sampling0.05° Lat-Lon
Characteristics & methodsW/m². Bulk parametrization
ACCURACY REQUIREMENTS
Thresold accuracymonthly relative bias : 10%, monthly relative Std. Deviation :20%
Target accuracymonthly (TBC) relative bias : 5%, monthly relative Std. Deviation :10%
Optimal accuracymonthly relative bias : 0%, monthly relative Std. Deviation : 3%
Verification/validation methodroutine comparison with pyrgeometer measurements
DATA ACCESS
OSI SAF ProducerMétéo-FranceMain FTP serverLML FTP server (hosted by Ifremer)
Other FTP serverbackup LML FTP server (last 7 days)
Diffusion mean(s) and format(s)EUMETCast (NetCDF4)
Ifremer FTP Server (NetCDF4)
EDC (NetCDF4)
Other mean(s) to access main serverThredds
HTTPS
Applications and usersOcean atmosphere studies.
VIEW MORE DOCUMENTATION
Product web pageDescriptionProduct User ManualPUM
Live production statusStatus
Last products at a glanceQuicklook
Continuous monitoringQuality
HISTORY, COMMENTS
  • Replaced OSI-303 based on Meteosat-10 input on 20 February 2018
  • EUMETSAT product navigator reference for daily product : EO:EUM:DAT:MSG:OSI-303-D
  • Using cloud type from NWC SAF software v2016
Declared operational/released20/02/2018
On EUMETCast since20/02/2018
In EDC since20/02/2018
First product date20/02/2018