Blending 2D topography images from the Surface Water and Ocean Topography (SWOT) mission into the altimeter constellation with the Level-3 multi-mission Data Unification and Altimeter Combination System (DUACS)

Dibarboure, Gerald; Anadon, Cécile; Briol, Frédéric; Cadier, Emeline; Chevrier, Robin; Delepoulle, Antoine; Faugère, Yannice; Laloue, Alice; Morrow, Rosemary; Picot, Nicolas; Prandi, Pierre; Pujol, Marie-Isabelle; Raynal, Matthias; Tréboutte, Anaelle; Ubelmann, Clément

doi:https://doi.org/10.5194/os-21-283-2025

Articles | Volume 21, issue 1

https://doi.org/10.5194/os-21-283-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/os-21-283-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 1

Research article

| Highlight paper

|

30 Jan 2025

Research article | Highlight paper |

| 30 Jan 2025

Blending 2D topography images from the Surface Water and Ocean Topography (SWOT) mission into the altimeter constellation with the Level-3 multi-mission Data Unification and Altimeter Combination System (DUACS)

Gerald Dibarboure, Cécile Anadon, Frédéric Briol, Emeline Cadier, Robin Chevrier, Antoine Delepoulle, Yannice Faugère, Alice Laloue, Rosemary Morrow, Nicolas Picot, Pierre Prandi, Marie-Isabelle Pujol, Matthias Raynal, Anaelle Tréboutte, and Clément Ubelmann

Data sets

SWOT Level-3 Product (expert 2-km variant) CNES https://doi.org/10.24400/527896/a01-2023.018

SWOT Level-3 Product (unsmoothed 250-m variant) CNES https://doi.org/10.24400/527896/A01-2024.003

SWOT Level-2 Ocean Product (AVISO repository) CNES/NASA/JPL https://doi.org/10.24400/527896/a01-2023.016

SWOT Level-3 KaRIn Low Rate SSH Basic (v1.0.2) AVISO/DUACS https://doi.org/10.24400/527896/A01-2023.017

SWOT Level-3 KaRIn Low Rate SSH Expert (v1.0.2) AVISO/DUACS https://doi.org/10.24400/527896/A01-2023.018

SWOT Level-3 KaRIn Low Rate SSH Unsmoothed (v1.0.2) AVISO/DUACS https://doi.org/10.24400/527896/A01-2024.003

Surface Water and Ocean Topography (SWOT) NASA https://podaac.jpl.nasa.gov/swot?tab=datasets

SWOT Level-2 KaRIn Low Rate SSH Unsmoothed (v2.0) SWOT project https://doi.org/10.24400/527896/A01-2023.016

SWOT Level-2 KaRIn Low Rate SSH Expert (v2.0) SWOT project https://doi.org/10.24400/527896/A01-2023.015

GDR (Geophysical Data Records) SWOT project https://doi.org/10.24400/527896/a01-2023.005

Global Ocean Along Track L3 Sea Surface Heights Reprocessed 1993 Ongoing Tailored For Data Assimilation E.U Copernicus Marine Service Information (CMEMS) https://doi.org/10.48670/moi-00146

Global Ocean Gridded L4 Sea Surface Heights And Derived Variables Reprocessed 1993 Ongoing E.U Copernicus Marine Service Information (CMEMS) https://doi.org/10.48670/moi-00148

Global Ocean Colour (Copernicus-GlobColour), Bio-Geo-Chemical, L3 (daily) from Satellite Observations (Near Real Time) E.U Copernicus Marine Service Information (CMEMS) https://doi.org/10.48670/moi-00278

Co-editor-in-chief

This paper thoroughly describes the data processing steps and assessment of the usefulness of the new SWOT mission for advancing ocean science. The paper will be of great interest the ocean and sea ice communities and others. The discussion of the benefits, relevance, and limitations of Level-3 swath-altimeter products for various research domains is particularly important.