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Aviso global sea surface height products

Aviso has been distributing Topex/Poseidon and ERS altimetric data worldwide since 1992. Since launches of Jason-1 in December 2002 and of Envisat in March 2002, a new serie of products has been completing the AVISO catalogue. Following table presents applications, features and time availability of all available products obtained by satellite or combining available data of all satellites (T/P+ERS-1 or ERS-2, Jason-1+ERS-2+GFO...).
Ssalto/Duacs products are intercalibrated at crossover points; considering two datasets (for example coming from Jason-1 and Envisat), only Ssalto/Duacs products may be homogeneous at a given point.

Gridded products

Gridded products

 

Ssalto/Duacs Gridded Sea level anomalies & geostrophic velocity anomalies
(1/3°x1/3° on a Mercator grid)

Contents: gridded sea surface heights computed with respect to a seven-year mean, and corresponding geostrophic velocity anomalies
Use: study of ocean variability (mesoscale circulation, seasonal variation, El Niño...), including operational oceanography (near-real time products)

-DT-MSLA
-NRT-MSLA

Ssalto/Duacs Gridded Absolute Dynamic Topography & absolute geostrophic velocities
(1/3°x1/3° on a Mercator grid)

Contents: gridded sea surface heights above geoid and corresponding absolute geostrophic velocities
Use: study of the general circulation (ocean gyres ...)

-DT-MADT
-NRT-MADT

 

 

Along-track products

Along-track products

 

Ssalto/Duacs Sea level anomalies

Contents: along-track sea surface heights, computed with respect to a seven-year mean.
Use: study of ocean variability (mesoscale circulation, seasonal variation, El Niño...), including operational oceanography (near-real time products)

- DT-SLA
- NRT-SLA

Ssalto/Duacs Absolute Dynamic Topography

Contents: along-track sea surface heights above geoid
Use: study of the general circulation (ocean gyres ...)

- DT-ADT
- NRT-ADT

Monomission Sea level anomalies

Contents: along-track sea surface heights, computed with respect to CLS01 mean sea surface.
Use: study of ocean variability (mesoscale circulation, seasonal variation, El Niño...).


- DT-SLA

OSTM/Jason-2 Sea Surface Height Anomalies

Contents: OSTM/Jason-2 along-track sea surface heights computed with respect to CLS01 mean sea surface. Available in real-time, near-real time and delayed-time.
Use: from operational oceanography and marine meteorology (real time products) to the study of ocean variability.

- OGDR-SSHA

- IGDR-SSHA

- GDR-SSHA

Monomission Corrected Sea Surface Heights

Contents: along-track corrected sea surface heights wrt reference ellipsoid, with corrections, significant wave heights and backscatter coefficient.
Use: stationary or long-term geophysical and ocean phenomenon studies; thanks to the corrections package, user is able to substitute algorithms in accordance with his needs.

- DT-CorSSH

Geophysical Data

Contents: along-track altimetric measurements averaged over 1 seconde, corrections to apply
Use: geophysical studies, operational oceanography

- IGDR
- GDR

Geophysical and sensor data

Contents: 20 Hz along-track waveform information, corrections to apply
Use: expert use; coastal, ice studies or anything requesting a different retracking function than the one used for ocean

- Poseidon-1 Waveforms
- SGDR
(Jason-1, Envisat, Jason-2)