Estimation of the downward longwave irradiance reaching the Earth surface derived from the data of the imager on board the geostationary satellite GOES. 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.
Other input :NWP outputs (temperature and humidity profiles), cloud classification
Frequency :24 per day + 1 per day
Central time :00:00, 01:00, …, 23:00 – 12:00
Timeliness :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)
Main Diffusion Means :
LML FTP server (hosted by Ifremer) : ftp://eftp1.ifremer.fr/cersat-rt/project/osi-saf/data/radflux/l3/
backup LML FTP server (last 7 days) : ftp://eftp2.ifremer.fr/cersat-rt/project/osi-saf/data/radflux/l3/