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Description

This dataset contains along track geo-referenced Sea Surface Height Anomalies (SSHA) from TOPEX/Poseidon, Jason-1 and OSTM/Jason-2 (depending on time period) merged into a single mean reference orbit. All biases and cross-calibrations have been applied to the data so SSHA are consistent between satellites to form a single climate data record. Altimeter data from the multi-mission Geophysical Data Records (GDRs) are interpolated to a common reference orbit facilitating direct time series analysis of the geo-referenced SSH. The data are in netCDF format in an array based on 3-dimensions (rev#, index, cycle) that permits direct access of individual locations at specific times (i.e., temporal and spatial sub-sampling). Each file consists of one cycle of data, which is approximately 10 days long. Cycle 001 coincides with cycle 001 of TOPEX/Poseidon (September 25-October 3, 1992) and is presently updated to cycle 748, which coincides with OSTM/Jason-2 cycle 166 (January 3-13, 2013).

Product Summary

Platforms
OSTM/JASON-2 ,
JASON-1 ,
TOPEX/POSEIDON
Instruments
AMR ,
POSEIDON-3 ,
JASON-1 Microwave Radiometer ,
POSEIDON-2 ,
ALT (TOPEX) ,
TMR ,
SSALT
Projects
MEaSUREs
Spatial Extent

N: 66 S: -66 E: 180 W: -180

Location
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
1992-09-25 to 2015-01-16
Data Partner
Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA (NASA/JPL/PODAAC)
Concept ID
C2631958051-POCLOUD
Data State
DEPRECATED
Number of Files/Granules
821
Processing Level
2
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

GSFC. (2012). Integrated Multi-Mission Ocean Altimeter Data for Climate Research Version 2 [Dataset]. NASA Physical Oceanography Distributed Active Archive Center. https://doi.org/10.5067/ALTCY-TJ122 Date Accessed: 2026-10-25

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