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SSALTO/DUACS Experimental products including CFOSat for wave-current interactions studies

Types of dataset: SSALTO/DUACS multimission "Experimental" products of geostrophic velocities and Sea level anomalies.

DOI: 10.24400/527896/a01-2023.001 -  more metadata

Contents: Version 2.0 of the product is available. 3 datasets are proposed 1/ along-track L3 across-track geostrophic velocities (from sea level anomaly and absolute dynamic topography) filtered at 15 and 60 km, with angle values (giving the positive across-track direction) of CFOSat mission, 2/ gridded L4 sea level anomalies and geostrophic velocities from 8 merged missions including CFOSat (Sentinel-6, Jason-3, Sentinel-3A, Sentinel-3B, Altika, Cryosat, HY2B, CFOSat) 3/ gridded L4 Sea level anomalies and geostrophic velocities from 7 merged missions without CFOsat (Sentinel-6, Jason-3, Sentinel-3A, Sentinel-3B, Altika, Cryosat, HY2B).

Use: wave-current interactions

Condition of access:  Users should keep in mind that these products are experimental products. Notably, they are not produced on an operational basis. 

Citation: When using those experimental products, please cite: "Those products were processed by SALP and distributed by AVISO+ ( with support from CNES (”


  • The CFOsat sea level measurements used to calculate the L3 and L4 products were processed using the latest version of CFOsat processing (Tourain et al., 2023) with a specific SSB (Sea State Bias) correction using the contribution of diffusiometric measurements of wave spectra. Editing adapted to 5Hz and slackened on strong waves has made it possible to clean up anomaly data while retaining as much usable data as possible. The SLA is filtered at 1000km to retain only the high-frequency input from CFOSAT. Low frequencies are replaced by the mean sea level calculated at L3 level, combining all satellites.
  • For the L4 products, the geostrophic current is derivated from sea level anomaly maps generated with MIOST multiscale and multivariate mapping tool (Ballarotta et al., 2023) with level 3 altimetric data (except for CFOSat) distributed by the EU Copernicus Marine Service (product SEALEVEL_GLO_PHY_L3_MY_008_062, Details in Jenn-Alet & al., OSTST 2023

Geographic coverage: global

Format: NetCDF


Copyright : 2019-2023 CLS/Cnes

SSALTO/DUACS Experimental products including CFOSat for wave current interactions studies

Products Version Area Type Authenticated access service Data period File weight
L3 CFOSat product 2.0 Global along-track
filtered at 15 and 60 km
please refer to MY AVISO+ and select the product
"Ssalto/Duacs Experimental products: along-track and gridded Sea Level Heights and velocities"
2019/05/19 – 2023/03/06 560 Kb
L4 including CFOSat product
8 missions
gridded 12 Mb
L4 without CFOSat product
7 Missions
L3 CFOSat product 1.0 Global along-track 
filtered at 45 and 60 km
No more available (only on demand at 01/01/2021 - 31/12/2021 -

L4 including CFOSat product
4 missions

gridded 01/01/2021 - 31/12/2021 -

L4 without CFOSat product
5 missions

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