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 and HTTPS access, you need credentials which are provided on request, after registration on OSI SAF web site.

OSI SAF FTP (main, full archive)

Directory: cersat-rt/project/osi-saf/data/sst/l3c/north_atlantic/

OSI SAF backup FTP (last 7 days)

Directory: cersat-rt/project/osi-saf/data/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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