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Description

A Group for High Resolution Sea Surface Temperature (GHRSST) Level 4 sea surface temperature analysis produced daily on an operational basis at the Office of Satellite and Product Operations (OSPO) using optimal interpolation (OI) on a global 0.054 degree grid. The Geo-Polar Blended Sea Surface Temperature (SST) Analysis combines multi-satellite retrievals of sea surface temperature into a single analysis of SST. This analysis includes only nighttime data from sensors that include the Advanced Very High Resolution Radiometer (AVHRR), the Visible Infrared Imager Radiometer Suite (VIIRS), the Geostationary Operational Environmental Satellite (GOES) imager, the Japanese Advanced Meteorological Imager (JAMI) and in situ data from ships, drifting and moored buoys. This analysis was specifically produced to be used as a lower boundary condition in Numerical Weather Prediction (NWP) models. This dataset adheres to the GHRSST Data Processing Specification (GDS) version 2 format specifications.

Product Summary

Platforms
GOES-16 ,
Himawari-9 ,
GOES-15 ,
Suomi-NPP ,
METOP-B ,
METEOSAT-10
Instruments
ABI ,
AHI ,
GOES-15 Imager ,
VIIRS ,
AVHRR-3 ,
SEVIRI
Spatial Extent

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

Spatial Resolution
0.05 Decimal Degrees x 0.05 Decimal Degrees
Geographic Region
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2014-06-02
Data Partner
Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA (NASA/JPL/PODAAC) ,
Office of Satellite and Product Operations, NESDIS, NOAA, U.S. Department of Commerce (DOC/NOAA/NESDIS/OSPO)
Concept ID
C2036877745-POCLOUD
Data State
ACTIVE
Number of Files/Granules
4090
Processing Level
4
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

OSPO. (2015). GHRSST Level 4 OSPO Global Nighttime Foundation Sea Surface Temperature Analysis (GDS version 2) [Data set]. NASA Physical Oceanography Distributed Active Archive Center. https://doi.org/10.5067/GHGPN-4FO02 Date Accessed: 2025-12-14

Documents

Variables

Variables are a set of physical properties whose values determine the characteristics or behavior of something. For example, temperature and pressure are variables of the atmosphere. Parameters and variables can be used interchangeably. Variable level attributes provide individual information for each variable.

The Name in this table is the variable name. Fill value indicates missing or undefined data points in a variable. Valid range is the range of values the variable can store. Scale factor is used to increase or decrease the size of an object and can be used to correct for distortion. For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor
analysed_sst nighttime analysed SST for each ocean grid point Kelvin short -32768 -200 to 3500 0.01
analysis_error Estimate of internal analysis accuracy Kelvin short -32768 0 to 500 0.01
lat equirectangular projection degrees_north float N/A -90 to 90 1
lon equirectangular projection degrees_east float N/A -180 to 180 1
mask b0: 1=grid cell is water, b1: 1=grid cell is land, b2: 1=grid cell is ice N/A byte 0 1 to 4 1
sea_ice_fraction Percentage of ice 1 byte -128 0 to 100 0.01
time Nominal time of Level 4 analysis seconds since 1981-01-01 00:00:00 int N/A N/A 1
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