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Description

A Group for High Resolution Sea Surface Temperature (GHRSST) global Level 4 sea surface temperature analysis produced daily on a 0.09-degree grid at Remote Sensing Systems. This product uses optimal interpolation (OI) from both microwave (MW) sensors including the Global Precipitation Measurement (GPM) Microwave Imager (GMI), the Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI), the NASA Advanced Microwave Scanning Radiometer-EOS (AMSRE), the Advanced Microwave Scanning Radiometer 2 (AMSR2) onboard the GCOM-W1 satellite, and WindSat operates on the Coriolis satellite, and infrared (IR) sensors such as the Moderate Resolution Imaging Spectroradiometer (MODIS) on the NASA Aqua and Terra platform and the Visible Infrared Imaging Radiometer Suite (VIIRS) on board the Suomi-NPP satellite. The through-cloud capabilities of microwave radiometers provide a valuable picture of global sea surface temperature (SST) while infrared radiometers (i.e., MODIS) have a higher spatial resolution. This analysis does not use any in situ SST data such as drifting buoy SST. Comparing with previous version 4.0 dataset, the version 5.0 has made the updates in several areas, including the diurnal warming model, the sensor-specific error statistics (SSES) for each microwave sensor, the sensor correlation model, and the quality mask.

Product Summary

Platforms
Aqua ,
TRMM ,
CORIOLIS ,
Terra ,
GPM ,
Suomi-NPP ,
GCOM-W1
Instruments
MODIS ,
AMSR-E ,
TMI ,
WINDSAT ,
GMI ,
VIIRS ,
AMSR2
Spatial Extent

N: 90 S: -90 E: 180 W: -179

Spatial Resolution
0.09 Decimal Degrees x 0.09 Decimal Degrees
Geographic Region
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2002-06-01
Data Partner
Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA (NASA/JPL/PODAAC) ,
Remote Sensing Systems (RSS)
Concept ID
C2036878045-POCLOUD
Data State
ACTIVE
Number of Files/Granules
7427
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

Remote Sensing Systems. (2017). GHRSST Level 4 MW_IR_OI Global Foundation Sea Surface Temperature analysis version 5.0 from REMSS [Data set]. NASA Physical Oceanography Distributed Active Archive Center. https://doi.org/10.5067/GHMWI-4FR05 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 analysed sea surface temperature K short -32767 -200 to 5000 0.01
analysis_error estimated error standard deviation of analysed_sst K short -32767 0 to 32767 0.01
lat geographical coordinates, WGS84 datum degrees_north float N/A -90 to 90 1
lon geographical coordinates, WGS84 datum degrees_east float N/A -180 to 180 1
mask land sea ice lake bit mask N/A byte -127 0 to 127 1
sea_ice_fraction sea ice area fraction 1 byte -127 0 to 100 0.01
time nominal time of L4 analysis seconds since 1981-01-01 00:00:00 int N/A N/A 1
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