a57da16f-330a-4927-b532-ca013b6c83da 2026-03-31T14:16:45.993396Z ISO 19115-3:2018 - Remote Sensing 1.0 Experimental Product: Multimission Gridded (with SWOT, MIOST only) Level-4 Sea Surface Heights and Velocities 2025-05-14 publication A01-2025.001 3.0 These gridded products are produced from the following upstream data: - for satellites SARAL/AltiKa, Cryosat-2, HaiYang-2B, Jason-3, Copernicus Sentinel-3A/B, Sentinel-6 MF, SWOT Nadir => NRT (Near-Real-Time) Nadir along-track (or Level-3) SEA LEVEL products (DOI: https://doi.org/10.48670/moi-00147) delivered by the Copernicus Marine Service (http://marine.copernicus.eu/ ). The gridded product is based on near-real-time (NRT) Level-3 Nadir datasets for the period from July 7, 2025, to December 31, 2025. => MY (Multi-Year) Nadir along-track (or Level-3) SEA LEVEL products (DOI: https://doi.org/10.48670/moi-00146 ) delivered by the Copernicus Marine Service (CMEMS, http://marine.copernicus.eu/ ). The gridded product is based on MY Level-3 Nadir datasets for the period from March 28, 2023, to July 6, 2025. - for SWOT KaRIn : the L3_LR_SSH Expert v3.0 product distributed by AVISO (DOI: https://doi.org/10.24400/527896/A01-2023.018) from March 28, 2023 to December 31, 2025. One mapping algorithm is proposed: the MIOST approach which provides which provides global Sea Surface Height (SSH) solutions. The MIOST method is capable of accounting for various modes of ocean surface topography variability (e.g., geostrophic, barotropic, equatorial wave dynamics) by constructing multiple independent components within a predefined covariance model. CDS-AVISO accepted CDS-AVISO distributor CNES funder AVISO Helpdesk aviso@altimetry.fr pointOfContact CNES originator CLS originator https://sextant.ifremer.fr/geonetwork/srv/api/records/a57da16f-330a-4927-b532-ca013b6c83da/attachments/dc_2024_ose_karin.png Example of geostrophic current reconstruction on 2023-08-31 with MIOST at a) global scale, b) view from Karin L3 products over the Agulhas region, c) from MIOST reconstruction integration 1SWOT and 6 nadirs, d) from MIOST reconstruction integration 6 nadirs and e) the difference in MIOST reconstructions between integration 1SWOT and 6 nadirs vs 6 nadirs only. Credits CNES/CLS. CDS-AVISO Centre de données ODATIS 2026-01-19 publication geonetwork.thesaurus.local.theme.odatis_centre_donnees Variables ODATIS 2025-05-14 lastUpdate geonetwork.thesaurus.local.theme.odatis_variables /Observational data/satellite Type de jeux de donnée ODATIS 2025-12-09 publication geonetwork.thesaurus.local.theme.type_jeux_donnee Level 4 Processing level 2025-12-09 publication geonetwork.thesaurus.local.processing-level.myocean.processing-level Currents Sea surface height ODATIS aggregation parameters and Essential Variable names 2025-07-29 publication geonetwork.thesaurus.external.theme.NVS.OD1 /Ocean Circulation/Ocean Currents /Sea Surface Topography/Sea Surface Height Cersat - GCMD parameter 2024-01-04 publication geonetwork.thesaurus.external.theme.GCMDparameter /Observational data/satellite Type de jeux de donnée ODATIS 2025-12-09 publication geonetwork.thesaurus.local.theme.type_jeux_donnee Licence ouverte Licence Ouverte "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 3.0) [Data set]. CNES. https://doi.org/10.24400/527896/A01-2025.001. grid 0.25 utf8 oceans -180.00 180.00 -80.00 90.00 2023-03-28 2025-12-31 L4 NetCDF https://www.aviso.altimetry.fr/fileadmin/documents/data/tools/hdbk_duacs_experimental_miost_swot.pdf WWW:LINK Manuel utilisateur Manuel utilisateur https://tds-odatis.aviso.altimetry.fr/thredds/catalog/dataset-duacs-experimental-dt-phy-grids-nadirs-and-wide-swath/catalog.html WWW:LINK L4_with_SWOT THREDDS https://doi.org/10.5194/egusphere-2024-2345 WWW:LINK-1.0-http--publication-URL Main publication link 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., 2024: Integrating wide swath altimetry data into Level-4 multi-mission maps, EGUsphere [preprint], https://doi.org/10.1029/2020JC016560 WWW:LINK-1.0-http--publication-URL Main publication link 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 https://doi.org/10.24400/527896/A01-2025.001 DOI Digital Object Identifier (DOI) v3.0 2026-03-25