Global Metop Sea Surface Temperature

Operational Near real time product

Level 3 twice-daily sub-skin Sea Surface Temperature derived from AVHRR on Metop-B, global and re-projected on a 0.05° regular grid, in GHRSST compliant netCDF format.

Acronym : GBL SST
Product navigator reference :


OSI SAF producer : Météo-France
Identifier : OSI-201-b
Digital object identifier (DOI) 10.15770/EUM_SAF_OSI_NRT_2011
Citation : See at bottom
Processing level : L3C
Satellite input : Metop-B/AVHRR
Other input : ECMWF outputs (temperature, humidity and aerosols profiles)
Temporal sampling : 2 per day
Central time : 00:00, 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. 6 h
Spatial coverage : global
Spatial sampling : 0.05°
Projection : cylindrical equidistant
File Formats : LML FTP Server (NetCDF4), EDC (NetCDF4), EDC (GRIB2), EUMETCast (NetCDF4)
Characteristics & methods : The satellite input data has successively come from Metop-A and Metop-B level 1 data processed at EUMETSAT. SST is retrieved from AVHRR infrared channels (3.7, 10.8 and 12.0 µm) using a multispectral algorithm and a cloud mask.
Atmospheric profiles of water vapor and temperature from a numerical weather prediction model, Sea Surface Temperature from an analysis, together with a radiative transfer model, are used to correct the multispectral algorithm for regional and seasonal biases due to changing atmospheric conditions.
The quality of the products is monitored regularly by daily comparison of the satellite estimates against buoy measurements.
The product format is compliant with the GHRSST Data Specification (GDS) version 2. Users are advised to use data only with quality levels 3,4 and 5.
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/global/

OSI SAF backup FTP (last 7 days)

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

EUMETSAT Multicast


EUMETSAT Online Map Service

Direct link

Redistribution by PO.DAAC

Accuracy Requirements
Target accuracy : monthly absolute mean difference: 0.5 K, sdt dev.: 0.8 K
Verification/validation method : routine comparison with drifting buoy measurements
Applications and users
Usage : Operational Met Services
Operational analyses and ocean models
Research or Environmental monitoring
Authorised to be operational / released :
Declared operational / released since :
On EUMETCast since :
On EDC since :
On FTP server since :
Full series temporal coverage : 2008-onwards
Detailed history :

The product series is operational since 2008:

  • version OSI-201 (input: Metop-A) from 2008 to 23/02/2016
  • version OSI-201-b (input: Metop-B) from 23/02/2016 onwards

From 12/01/2017, the dissemination of the GRIB format has been discontinued, the product is now provided only in netCDF, compliant with the Data Specification (GDS) version 2 from the Group for High Resolution Sea Surface Temperatures (GHRSST).

Citation : OSI SAF Global Sea Surface Temperature (Metop-B/AVHRR) 2016-onwards, OSI-201-b, doi:10.15770/EUM_SAF_OSI_NRT_2011. 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 format is compliant with the Data Specification (GDS) version 2 from the Group for High Resolution Sea Surface Temperatures (GHRSST).

    GHRSST identifier (collection id): AVHRR_SST_METOP_B_GLB-OSISAF-L3C-v1.0

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