North Atlantic Regional Sea Surface Temperature

Operational Near real time product

Level 3, four times a day, sub-skin Sea Surface Temperature derived from AVHRR on Metop and VIIRS on NOAA, over North Atlantic and European Seas and re-projected on a polar stereographic at 2 km resolution, in GHRSST compliant netCDF format.

Acronym : NAR SST
Product navigator reference :


OSI SAF producer : Météo-France
Identifier : OSI-202-c
Digital object identifier (DOI) 10.15770/EUM_SAF_OSI_NRT_2012
Acronym for EDC (APNM) : OSSTNARN
Citation : See at bottom
Processing level : L3C
Satellite input : Metop-B/AVHRR and NOAA-20/VIIRS
Other input : ECMWF outputs (temperature, humidity and aerosols profiles)
Temporal sampling : 4 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. 6h
Spatial coverage : North Atlantic
Spatial sampling : 2 km
Projection : polar stereographic
File Formats : LML FTP Server (NetCDF4), EDC (NetCDF4), EDC (GRIB2), EUMETCast (NetCDF4)
Characteristics & methods : Subskin temperature; multispectral algorithm + use of NWP output
Data Access
Credentials for access to OSI SAF tools For the FTP access, please use the username anonymous.

OSI SAF FTP (main, full archive)

Directory: ifremer/cersat/projects/osisaf/sst/l3c/north_atlantic/

OSI SAF backup FTP (last 7 days)

Directory: ifremer/cersat/projects/osisaf/sst/l3c/north_atlantic/

EUMETSAT Multicast

Redistribution by PO.DAAC



Metop-B: Browse / Search


Accuracy Requirements
Target accuracy : monthly absolute mean difference: 0,5 K, Sdt Deviation: 0,8 K
Verification/validation method : routine comparison with drifting buoy measurements
Applications and users
Usage : Atmosphere and ocean models
Oceanography and fisheries.
Authorised to be operational / released :
Declared operational / released since :
On EUMETCast since :
On EDC since :
On FTP server since :
Expected date for operational/released :
First date :
Full series temporal coverage : 2006-onwards
Detailed history :

The product series is operational since 2006

  • version OSI-202     Metop-A and NOAA-18/NOAA-19 from 2006 to 2013
  • version OSI-202-a  Metop-A and NPP  from 2013 to 2016
  • version OSI-202-b  Metop-B and NPP  from 2016 to 2020
  • version OSI-202-c  Metop-B and NOAA-20 from 2020 onwards

By satellite:

  • Metop-A  2008-2016         OSI-202
  • Metop-B  2016-onwards    OSI-202-b/OSI-202-c
  • NOAA-17 2006-2010        
  • NOAA-18 2006-2012         OSI-202
  • NOAA-19 2009-2013         OSI-202
  • NPP         2013-2020         OSI-202-a/OSI-202-b
  • NOAA-20 2020-ongoing     OSI-202-c
Citation : OSI SAF North Atlantic Regional Sea Surface Temperature, OSI-202-c, doi:10.15770/EUM_SAF_OSI_NRT_2012. 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...
  • GHRSST identifiers (collection id):

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