GOES-East Downward Longwave Irradiance

Operational Near real time product

Estimation of the downward longwave irradiance reaching the Earth surface derived from the data of the imager on board the geostationary satellite GOES.
The product is remapped onto a 0.05° regular grid and expressed in W/m2.

Acronym : GOES-E DLI
Product navigator reference :


OSI SAF producer : Météo-France
Identifier : OSI-305-b
Acronym for EDC (APNM) : ODDLISSI
Citation : See at bottom
Processing level : L3
Satellite input : GOES-16/ABI
Other input : NWP outputs (temperature and humidity profiles), cloud classification
Temporal sampling : 24 per day + 1 per day
Central time : 00:00, 01:00, …, 23:00 – 12:00
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 : West Atlantic East Pacific : 60N-60S 135W-15W
Spatial sampling : 0.05° Lat-Lon
Projection : Cylindrical equidistant
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.
Data Access

OSI SAF FTP (main, full archive)

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

OSI SAF backup FTP (last 7 days)

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

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.
Authorised to be operational / released :
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-305 from 2011
  • version OSI-305-a up to 19/01/2021
  • version OSI-305-b from 19/01/2021 onwards
Citation : OSI SAF GOES-East Downward Longwave Irradiance 2021-onwards, OSI-305-b. 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...
  • This product supersed OSI-305-a (temporary product, processed with a temporary chain previously processing OSI-305) on 19/01/2019.

  • EUMETSAT product navigator reference for daily product: EO:EUM:DAT:GOES:OSI-305-A-D

  • Product based on the GOES-East data received in the OSI SAF production centre (Météo-France Lannion) directly from the satellite

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