Meteosat Downward Longwave Irradiance
Operational Near real time productEstimation of the downward longwave irradiance reaching the Earth surface derived from SEVIRI data on board the geostationary satellite Meteosat.
The product is remapped onto a 0.05° regular grid and expressed in W/m2.
Identification
Acronym : MET DLI
Product navigator reference :
EO:EUM:DAT:MSG:OSI-303-H
OSI SAF producer : Météo-France
Identifier : OSI-303-a
Acronym for EDC (APNM) : ODDLISSI
Citation : See at bottom
Characteristics
Processing level : L3
Satellite input : Meteosat-10/SEVIRI
Other input : ECMWF outputs (temperature and humidity profiles), cloud classification
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 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 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
Credentials for access to OSI SAF tools
For the FTP and HTTPS access, you need credentials which are provided on request, after registration on OSI SAF web site.
OSI SAF FTP (main, full archive)
ftp://eftp1.ifremer.fr/
Directory: cersat-rt/project/osi-saf/data/radflux/l3/east_atlantic_west_indian/
OSI SAF backup FTP (last 7 days)
ftp://eftp2.ifremer.fr/
Directory: cersat-rt/project/osi-saf/data/radflux/l3/east_atlantic_west_indian/
OSI SAF HTTPS
OSI SAF Thredds
EUMETSAT Multicast
Accuracy Requirements
Target accuracy : monthly (TBC) relative absolute mean difference: 5%, monthly relative standard deviation :10%
Verification/validation method : routine comparison with pyrgeometer measurements
Applications and users
Usage : Ocean atmosphere studies.
History
Declared operational / released since :
On EUMETCast since :
On EDC since :
On FTP server since :
First date :
Full series temporal coverage : 2011-onwards
Detailed history :
The product series is operational since 2011:
- version OSI-303 from 2011 to 20/02/2018
- version OSI-303-a from 20/02/2018 onwards
Citation
Citation : OSI SAF Meteosat Downward Longwave Irradiance 2018-onwards, OSI-303-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...
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...
Comments
New ticket helpdesk
From 19/01/2021, processed with a new chain, using cloud products from NWC SAF software v2018
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