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Description

A global 1 km Group for High Resolution Sea Surface Temperature (GHRSST) Level 2P dataset based on multi-channel sea surface temperature (SST) retrievals generated in real-time from the Infrared Atmospheric Sounding Interferometer (IASI) on the European Meteorological Operational-A (MetOp-A）satellite （launched 19 Oct 2006). The European Organization for the Exploitation of Meteorological Satellites (EUMETSAT),Ocean and Sea Ice Satellite Application Facility (OSI SAF) is producing SST products in near realtime from METOP/IASI. The Infrared Atmospheric Sounding Interferometer (IASI) measures inthe infrared part of the electromagnetic spectrum at a horizontal resolution of 12 km at nadir up to40km over a swath width of about 2,200 km. With 14 orbits in a sun-synchronous mid-morningorbit (9:30 Local Solar Time equator crossing, descending node) global observations can beprovided twice a day. The SST retrieval is performed and provided by the IASI L2 processor atEUMETSAT headquarters. The product format is compliant with the GHRSST Data Specification(GDS) version 2.

Product Summary

Platforms
METOP-A
Instruments
IASI
Spatial Extent

N: 90 S: -90 E: 180 W: -180

Spatial Resolution
12000 Meters x 12000 Meters
Location
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2014-11-20 to 2016-02-23
Data Partner
Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA (NASA/JPL/PODAAC)
Concept ID
C2499940517-POCLOUD
Data State
COMPLETE
Number of Files/Granules
214031
Processing Level
2P
Published
Updated
Science Keywords
Sea Surface 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

OSISAF. (2015). GHRSST Level 2P Global Skin Sea Surface Temperature from the Infrared Atmospheric Sounding Interferometer (IASI) on the MetOp-A satellite (GDS2 version) [Data set]. NASA Physical Oceanography Distributed Active Archive Center. https://doi.org/10.5067/GHIAS-2PO01 Date Accessed: 2026-04-20

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
aerosol_dynamic_indicator Estimate of the potential for aerosol contamination count byte -128 0 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 short N/A 0 to 7 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
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 Fractional sea ice cover from OSISAF ice concentration product byte -128 0 to 100 0.01 N/A
sea_surface_temperature Temperature of the skin of the ocean kelvin short -32768 -135 to 5685 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 short -32768 -32767 to 32767 1 N/A
time includes leap seconds since 1981 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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