Articles | Volume 21, issue 1
https://doi.org/10.5194/os-21-283-2025
https://doi.org/10.5194/os-21-283-2025
Research article
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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

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Cited articles

Ajayi, A., Le Sommer, J., Chassignet, E., Molines, J.-M., Xu, X., Albert, A., and Cosme, E.: Spatial and Temporal Variability of the North Atlantic Eddy Field From Two Kilometric-Resolution Ocean Models, J. Geophys. Res.-Oceans, 125, e2019JC015827, https://doi.org/10.1029/2019JC015827, 2020. 
Arbic, B. K., Scott, R. B., Chelton, D. B., Richman, J. G., and Shriver, J. F.: Effects of stencil width on surface ocean geostrophic velocity and vorticity estimation from gridded satellite altimeter data, J. Geophys. Res.-Oceans, 117, C03029, https://doi.org/10.1029/2011JC007367, 2012. 
AVISO/DUACS: SWOT Level-3 KaRIn Low Rate SSH Basic (v1.0.2), CNES [data set], https://doi.org/10.24400/527896/A01-2023.017, 2024a. 
AVISO/DUACS: SWOT Level-3 KaRIn Low Rate SSH Expert (v1.0.2), CNES [data set], https://doi.org/10.24400/527896/A01-2023.018, 2024b. 
AVISO/DUACS: SWOT Level-3 KaRIn Low Rate SSH Unsmoothed (v1.0.2), CNES [data set], https://doi.org/10.24400/527896/A01-2024.003, 2024c. 
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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.
Short summary
The Surface Water and Ocean Topography (SWOT) mission delivers unprecedented swath-altimetry products. In this paper, we describe how we extended the Level-3 algorithms to handle SWOT’s unique swath-altimeter data. We also illustrate and discuss the benefits, relevance, and limitations of Level-3 swath-altimeter products for various research domains.
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