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Description

A Group for High Resolution Sea Surface Temperature (GHRSST) dataset for the Eastern Atlantic Region from the Spinning Enhanced Visible and InfraRed Imager (SEVIRI) on the MSG satellites (Meteosat-8 and Meteosat-9). The European Organization for the Exploitation of Meteorological Satellites (EUMETSAT), Ocean and Sea Ice Satellite Application Facility (OSI SAF) has reprocessed SST products in (long) delayed-mode from MSG/SEVIRI. SST is retrieved from the SEVIRI infrared channels (10.8 and 12.0 micrometer) using a multispectral algorithm and the cloud mask (CM) from OSI SAF. Atmospheric profiles of water vapor and temperature from a numerical weather prediction (NWP) model, OSTIA Sea Surface Temperature re-analysis and analysis, together with a radiative transfer model (RTTOV), are used to correct the multispectral algorithm for regional and seasonal biases due to changing atmospheric conditions. Every 15-minute slot is processed at full satellite resolution. The products are then produced by remapping over a 0.05-degree regular grid (60S-60N and 60W-60E) SST fields obtained by aggregating all available 15-minute SST data into hourly files with priority being given to the value closest in time to the product nominal hour. The product format is compliant with the GHRSST Data Specification (GDS) version 2.

Product Summary

Platforms
MSG
Instruments
SEVIRI
Spatial Extent

N: 60 S: -60 E: 60 W: -60

Spatial Resolution
0.05 Decimal Degrees x 0.05 Decimal Degrees
Location
ATLANTIC OCEAN
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2004-01-19 to 2012-12-31
Data Partner
Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA (NASA/JPL/PODAAC) ,
Satellite Application Facility on Ocean and Sea ice, European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT/OSISAF)
Concept ID
C2157151105-POCLOUD
Data State
COMPLETE
Number of Files/Granules
77396
Processing Level
3
Published
Science Keywords
Sea Surface Subskin Temperature

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

OSI SAF, & EUMETSAT SAF On Ocean And Sea Ice. (2018). L3C hourly Sea Surface Temperature (GHRSST) data record release 1 - MSG (Version 1) [Data set]. EUMETSAT SAF on Ocean and Sea Ice. https://doi.org/10.15770/EUM_SAF_OSI_0004 Date Accessed: 2026-04-21

Documents

Variables

The table below lists the variables contained within a single granule for this dataset. Variables often contain observed or derived geophysical measurements collected from a variety of sources, including remote sensing instruments on satellite and airborne platforms, field campaigns, in situ measurements, and model outputs. The terms variable, parameter, scientific data set, layer, and band have been used across NASA’s Earth science disciplines; however, variable is the designated nomenclature in NASA’s Common Metadata Repository (CMR). Variable metadata attributes such as Name, Description, Units, Data Type, Fill Value, Valid Range, and Scale Factor allow users to efficiently process and analyze the data. The full range of attributes may not be applicable to all variables. Additional information on variable attributes is typically available in the data, user guide, and/or other product documentation.

For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor Offset
adi_dtime_from_sst Difference in hours between the ADI and SST data hour byte -128 -127 to 127 0.1 N/A
dt_analysis The difference between this SST and the previous day's SST analysis kelvin byte -128 -127 to 127 0.1 N/A
l2p_flags These flags are important to properly use the data. N/A int N/A 0 to 15 1 N/A
lat geographical coordinates, WGS84 projection degrees_north float N/A -90 to 90 1 N/A
lon geographical coordinates, WGS84 projection degrees_east float N/A -180 to 180 1 N/A
or_latitude Original latitude of the SST value degrees_north short -32768 -9000 to 9000 0.01 N/A
or_longitude Original longitude of the SST value degrees_east short -32768 -18000 to 18000 0.01 N/A
quality_level These are the overall quality indicators and are used for all GHRSST SSTs N/A byte -128 0 to 5 1 N/A
satellite_zenith_angle The satellite zenith angle at the time of the SST observations. angular_degree byte -128 -90 to 90 1 N/A
sea_ice_fraction from OSTIA byte -128 0 to 100 0.01 N/A
sea_surface_temperature Temperature of the subskin of the ocean kelvin short -32768 -300 to 4500 0.01 273.15
solar_zenith_angle The solar zenith angle at the time of the SST observations. angular_degree byte -128 -90 to 90 1 90
sources_of_adi This variable provides a pixel by pixel description of where aerosol optical depth were derived from. N/A byte -128 0 to 2 1 N/A
sses_bias Bias estimate derived using the techniques described at http://www.ghrsst.org/SSES-Description-of-schemes.html kelvin byte -128 -127 to 127 0.01 N/A
sses_standard_deviation Standard deviation estimate derived using the techniques described at http://www.ghrsst.org/SSES-Description-of-schemes.html kelvin byte -128 -127 to 127 0.01 1
sst_dtime time plus sst_dtime gives seconds after 00:00:00 UTC January 1, 1981 seconds int -2147483648 -2147483647 to 2147483647 1 N/A
time reference time of sst file seconds since 1981-01-01 00:00:00 int N/A N/A 1 N/A
wind_speed These wind speeds were created by the ECMWF and represent winds at 10 metres above the sea surface. m s-1 byte -128 0 to 127 1 N/A
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