GHRSST Level 3U Global Subskin Sea Surface Temperature version 8a from the Advanced Microwave Scanning Radiometer 2 on the GCOM-W satellite

1 Publication Cited this Dataset
Citation metrics available for years (2014-2022)
Processing Level3
Start/Stop Date2012-Jul-02 to Present
Short NameAMSR2-REMSS-L3U-v8a
DescriptionGDS2 Version -The Advanced Microwave Scanning Radiometer 2 (AMSR2) was launched on 18 May 2012, onboard the Golbal Change Observation Mission - Water (GCOM-W) satellite developed by the Japan Aerospace Exploration Agency (JAXA). The GCOM-W mission aims to establish the global and long-term observation system to collect data, which is needed to understand mechanisms of climate and water cycle variations, and demonstrate its utilization. AMSR2 onboard the first generation of the GCOM-W satellite will continue Aqua/AMSR-E observations of water vapor, cloud liquid water, precipitation, SST, sea surface wind speed, sea ice concentration, snow depth, and soil moisture. AMSR2 is a remote sensing instrument for measuring weak microwave emission from the surface and the atmosphere of the Earth. From about 700 km above the Earth, AMSR2 will provide us highly accurate measurements of the intensity of microwave emission and scattering. The antenna of AMSR2 rotates once per 1.5 seconds and obtains data over a 1450 km swath. This conical scan mechanism enables AMSR2 to acquire a set of daytime and nighttime data with more than 99% coverage of the Earth every 2 days. Remote Sensing Systems (RSS, or REMSS), providers of these SST data for the Group for High Resolution Sea Surface Temperature (GHRSST) Project, performs a detailed processing of AMSR-E instrument data in two stages. The first stage produces a near-real-time (NRT) product (identified by "rt" within the file name) which is made as available as soon as possible. This is generally within 3 hours of when the data are recorded. Although suitable for many timely uses the NRT products are not intended to be archive quality. "Final" data (currently identified by "v8" within the file name) are processed when RSS receives the atmospheric mode NCEP FNL analysis. The NCEP wind directions are particularly useful for retrieving more accurate SSTs and wind speeds. The final "v8" products will continue to accumulate new swaths (half orbits) until the maps are full, generally within 2 days.
Name: Global Change Observation Mission 1st-Water (GCOM-W1)
Orbit Period: 100.0 minutes
Inclination Angle: 98.19 degrees
Name: Advanced Microwave Scanning Radiometer 2 (AMSR2)
Swath Width: 1450.0 kilometers
Description: Spacecraft angular distance from orbital plane relative to the Equator.

ProjectGroup for High Resolution Sea Surface Temperature (GHRSST)
Data ProviderPublisher: Remote Sensing Systems
Creator: Remote Sensing Systems
Release Place: Santa Rosa, CA, USA
Release Date: 2017-Nov-30

Keyword(s)GHRSST, sea surface temperature, SST, REMSS, AMSR, AMSR2, GDS2
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Spatial Resolution: 0.25 Decimal Degrees x 0.25 Decimal Degrees
Temporal Resolution: Hourly - < Daily
Region: GLOBAL
North Bounding Coordinate: 90 degrees
South Bounding Coordinate: -90 degrees
West Bounding Coordinate: -179 degrees
East Bounding Coordinate: 180 degrees
Time Span: 2012-Jul-02 to Present
Granule Time Span: 2012-Jul-02 to 2022-Dec-14
Projection Type: Cylindrical Lat-Lon
Projection Detail: Geolocation information included for each pixel
Ellipsoid: WGS 84
NameLong NameUnit
cloud_liquid_watercloud liquid waterkg m-2
confidence_flagconfidence flag
cool_skincool skinK
diurnal_amplitudeestimated diurnal variabilityK
dt_analysisdeviation from sst reference climatologyK
l2p_flagsL2P flags
proximity_confidenceproximity confidence value
quality_levelquality level
rain_raterain ratemm hr-1
rejection_flagrejection flag
sea_ice_fractionsea ice fraction1
sea_surface_temperaturesea surface sub-skin temperatureK
sses_biasSSES biasK
sses_standard_deviationSSES standard deviationK
sst_dtimetime difference from reference timesecond
timereference time of sst fileseconds since 1981-01-01 00:00:00
water_vaportotal columnar water vaporkg m-2
wind_speedwind speedm s-1
Citation is critically important for dataset documentation and discovery. Please cite the data as follows, and cite the reference papers when it is appropriate.
Citation Remote Sensing Systems. 2017. GHRSST Level 3U Global Subskin SST from the AMSR2. Ver. 8a. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at

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For more information see Data Citations and Acknowledgments.

Journal Reference Wentz, F.J. & Gentmeann, C.L. & Hilburn, Kyle. (2005). Three years of ocean products from AMSR-E: evaluation and applications. IEEE Geosci. Remote Sens. Symp.. 7. 4929- 4932. 10.1109/IGARSS.2005.1526780.

Wentz, F.J. & Gentmeann, C.L. & Hilburn, Kyle. 2005. Three years of ocean products from AMSR-E: evaluation and applications, IEEE Geosci. Remote Sens. Symp., 7.

Frank J. Wentz and Thomas Meissner. 2007. Algorithm Theoretical Basis Document for AMSR-E Ocean Algorithms, RSS Tech. Rpt. 051707.