Catalogue PIGMA
Experimental Products: Multimission Gridded (with SWOT) Level-4 Sea Surface Heights and Velocities
These gridded products are produced from the along-track (or Level-3) SEA LEVEL products (DOI: doi.org/10.48670/moi-00147) delivered by the Copernicus Marine Service (CMEMS, marine.copernicus.eu) for satellites SARAL/AltiKa, Cryosat-2, HaiYang-2B, Jason-3, Copernicus Sentinel-3A/B, Sentinel-6 MF, SWOT nadir, and SWOT Level-3 KaRIn sea level products (DOI: https://doi.org/10.24400/527896/A01-2023.018 ).
Three mapping algorithms are proposed: MIOST, 4DvarNET, 4DvarQG:
- the MIOST approach which give the global SSH solutions: the MIOST method is able of accounting for various modes of variability of the ocean surface topography (e.g., geostrophic, barotrope, equatorial waves dynamic …) by constructing several independent components within an assumed covariance model.
- the 4DvarNET approach for the regional SSH solutions: the 4DvarNET mapping algorithm is a data-driven approach combining a data assimilation scheme associated with a deep learning framework.
- the 4DvarQG approach for the regional SSH solutions: the 4DvarQG mapping technique integrates a 4-Dimensional variational (4DVAR) scheme with a Quasi-Geostrophic (QG) model.
Simple
- Date (Publication)
- 2024-06-11
- Date
- Version
- 1.0
- Credit
- CDS-AVISO
- Status
- deprecated deprecated
- Keywords
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- Use limitation
- Licence ouverte
- Access constraints
- Other restrictions
- Use constraints
- License
- Other constraints
- Licence Ouverte
- Other constraints
- "The Multimission Gridded (MIOST with SWOT) Level-4 Sea Surface Heights and Velocities Experimental Product is processed by SSALTO/DUACS and freely distributed by AVISO". CNES, & CLS. (2025). Experimental Multimission Gridded (MIOST with SWOT) Level-4 Sea Surface Heights and Velocities (Version 1.0) [Data set]. CNES. https://doi.org/10.24400/527896/a01-2004.007”.
- Spatial representation type
- grid Grid
- Distance
- 0.25 degree
- Metadata language
- English
- Character set
- utf8 UTF8
- Topic category
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- Oceans
))
- Begin date
- 2023-03-28
- End date
- 2024-07-01
- Geometric object type
- Complex
- Distribution format
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NetCDF
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NetCDF
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)
- OnLine resource
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Manuel utilisateur
(
WWW:LINK
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Manuel utilisateur
- OnLine resource
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THREDDS
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WWW:LINK
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THREDDS
OnLine resource
- OnLine resource
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SLA (1 seule date ici)
(
OGC:WMS
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sea_surface_height_above_sea_level
- OnLine resource
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Main publication link
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WWW:LINK-1.0-http--publication-URL
)
Ballarotta, M., Ubelmann, C., Bellemin-Laponnaz, V., Le Guillou, F., Meda, G., Anadon, C., Laloue, A., Delepoulle, A., Faugère, Y., Pujol, M.-I., Fablet, R., and Dibarboure, G.: Integrating wide-swath altimetry data into Level-4 multi-mission maps, Ocean Sci., 21, 63–80, 2025
- OnLine resource
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Main publication link
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WWW:LINK-1.0-http--publication-URL
)
Beauchamp, M., Febvre, Q., Georgenthum, H., and Fablet, R., 2023: 4DVarNet-SSH: end-to-end learning of variational interpolation schemes for nadir and wide-swath satellite altimetry, Geosci. Model Dev., 16, 2119–2147
- OnLine resource
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Main publication link
(
WWW:LINK-1.0-http--publication-URL
)
Fablet, R., Beauchamp, M., Drumetz, L., and Rousseau, F., 2021: Joint Interpolation and Representation Learning for Irregularly Sampled Satellite-Derived Geophysical Fields, Front. Appl. Math. Stat., 7, 655224
- OnLine resource
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Main publication link
(
WWW:LINK-1.0-http--publication-URL
)
Le Guillou, F., Metref, S., Cosme, E., Ubelmann, C., Ballarotta, M. Le Sommer, J. Verron, J., 2021: Mapping Altimetry in the Forthcoming SWOT Era by Back-and-Forth Nudging a One-Layer Quasigeostrophic Model, J. Atmos. Oceanic Technol., 38, 697–710
- OnLine resource
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Main publication link
(
WWW:LINK-1.0-http--publication-URL
)
Ubelmann, C., Dibarboure, G., Gaultier, L., Ponte, A., Ardhuin, F., Ballarotta, M., & Faugère, Y., 2021: Reconstructing ocean surface current combining altimetry and future spaceborne Doppler data. Journal of Geophysical Research: Oceans, 126, e2020JC016560.
- OnLine resource
- Digital Object Identifier (DOI) ( DOI )
- Hierarchy level
- Dataset
- Statement
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Les données d'entrée utilisées pour le calcul des produits grillés "Multiscale Interpolation Ocean Science Topography" (MIOST) sont les produits SEA LEVEL le long de la trace (ou Level-3) CMEMS avec les satellites OSTM/Jason-2, Jason-3, SARAL/AltiKa, Cryosat-2, HaiYang-2A, Copernicus Sentinel-3A&B.
L'interpolation multi-échelles (MIOST) combine les données d'altimétrie océanique le long de la trace en grilles continues dans le temps et l'espace. Comme le système de cartographie DUACS, il est basé sur un schéma d'interpolation optimale linéaire, avec un niveau différent de définition des fonctions de covariance. Pour ce produit expérimental, seules les fonctions de covariance représentatives de la variabilité géostrophique à méso-échelle ont été prises en compte.
Références pour les produits grillés calculés par interpolation multi-échelles (MIOST)
- Ubelmann et al, 2021: Reconstructing Ocean Surface Current Combining Altimetry and Future Spaceborne Doppler Data, JGR Oceans, DOI: https://doi.org/10.1029/2020JC016560
- Ubelmann, C. et al. : Simultaneous estimation of Ocean mesoscale and coherent internal tide Sea Surface Height signatures from the global Altimetry record, Ocean Sci. Discuss. [preprint], https://doi.org/10.5194/os-2021-80 in review, 2021.
- Processing level code
- L4
- File identifier
- 96d932e6-07d0-447f-858a-90ff1ce53087 XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2025-06-06T15:19:23.716249Z
- Metadata standard name
- ISO 19115-3:2018 - Remote Sensing
- Metadata standard version
- 1.0
Overviews
Spatial extent
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