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Description

This dataset provides gridded Sea Surface Height Anomalies (SSHA) above a mean sea surface, on a 1/6th degree grid every 5 days. It contains the fully corrected heights, with a delay of up to 3 months. The gridded data are derived from the along-track SSHA data of TOPEX/Poseidon, Jason-1, Jason-2, Jason-3 and Jason-CS (Sentinel-6) as reference data from the level 2 along-track data found at https://podaac.jpl.nasa.gov/dataset/MERGED_TP_J1_OSTM_OST_CYCLES_V51, plus ERS-1, ERS-2, Envisat, SARAL-AltiKa, CryoSat-2, Sentinel-3A, Sentinel-3B, depending on the date, from the RADS database. The date given in the grid files is the center of the 5-day window. The grids were produced from altimeter data using Kriging interpolation, which gives best linear prediction based upon prior knowledge of covariance.

Product Summary

Platforms
OSTM/JASON-2 ,
JASON-1 ,
TOPEX/POSEIDON ,
JASON-3 ,
Sentinel-6A
Instruments
AMR ,
POSEIDON-3 ,
JASON-1 Microwave Radiometer ,
POSEIDON-2 ,
POSEIDON-3B ,
Poseidon-4 Radar Altimeter ,
AMR-C
Spatial Extent

N: 80 S: -80 E: 180 W: -180

Spatial Resolution
0.17 Decimal Degrees x 0.17 Decimal Degrees
Geographic Region
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
1992-10-01
Data Partner
Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA (NASA/JPL/PODAAC)
Concept ID
C2270392799-POCLOUD
Data State
ACTIVE
Number of Files/Granules
2207
Processing Level
4
Published
Updated
Science Keywords
Sea Surface Height

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

MEaSUREs. (2022). MEaSUREs Gridded Sea Surface Height Anomalies Version 2205 [Data set]. NASA Physical Oceanography Distributed Active Archive Center. https://doi.org/10.5067/SLREF-CDRV3 Date Accessed: 2025-12-14

Documents

USER'S GUIDE

DATA CITATION GUIDELINES

GENERAL DOCUMENTATION

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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
Latitude latitude degrees_north float N/A N/A 1
Lat_bounds latitude values at the north and south bounds of each pixel. degrees_north float N/A N/A 1
Longitude longitude degrees_east float N/A N/A 1
Lon_bounds longitude values at the west and east bounds of each pixel. degrees_east float N/A N/A 1
SLA Sea Level Anomaly Estimate m float 9.96921E+36 N/A 1
SLA_ERR Sea Level Anomaly Error Estimate m float 9.96921E+36 N/A 1
Time Time Days since 1985-01-01 00:00:00 float N/A N/A 1
Time_bounds Time bounds for each time value, same value as time variable. The time variable is defined on points instead of on bounding boxes. Days since 1985-01-01 00:00:00 float N/A N/A 1
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