Atlantic High Latitude Downward Longwave IrradianceOperational Near real time product
Daily Downward Longwave Irradiance over Atlantic High Latitudes based on AVHRR data from Metop and NOAA satellites.
Acronym : AHL DLI
Product navigator reference :
OSI SAF producer : Norwegian Meteorological Institute
Identifier : OSI-301-b
Acronym for EDC (APNM) : ODLISSIAHL
Processing level : L3
Satellite input : AVHRR (Metop, NOAA)
Other input : NWP outputs
Frequency : 1 per day
Central time : 12:00
Timeliness : 3h30
Spatial coverage : Atlantic North of 50N
Spatial sampling : 5 km
Projection : Polar Stereographic
File Formats : HL FTP Server (NetCDF4), EDC (NetCDF4), EUMETCast (NetCDF4)
Characteristics & methods : Bulk parameterization, including over sea ice
Target accuracy : monthly relative absolute mean difference: 5 %, monthly relative standard deviation: 10 %
Verification/validation method : Comparison with pyrgeometers measurements
Applications and users
Usage : NWP, Ocean and biological modeling at operational and research centers.
Authorised to be operational / released :
Declared operational / released since :
On EUMETCast since :
On EDC since :
On FTP server since :
First date :
New ticket helpdesk
This product superseded OSI-301.
Main differences with OSI-301 are
• the algorithm improvement, including over sea ice: new cloud type product from PPS v2014 (instead of v2009) and improved surface coefficients,
• processing on swath data instead of fixed tiles,
• the new output format (DLI and SSI combined in NetCDF4).
At the beginning of 2020, the data used are the AVHRR data from Metop-A, Metop-B and NOAA-19.