8c961685-cecb-41d9-b2d9-2a22cdd3d0c2 AVISO aviso@altimetry.fr editor 2026-07-10T17:42:33.828013Z ISO 19115-3:2018 - Remote Sensing ISO 19115-3:2018 - Remote Sensing http://www.opengis.net/def/crs/EPSG/0/4326 Altimetry product SWOT Level-3 Low Rate SSH - Expert Altimetry product SWOT Level-3 Low Rate SSH - Expert Produit altimétrique SWOT Niveau 3 Low Rate SSH - Expert 2023-12-22 creation 2024-05-07 lastUpdate 2024-09-10 lastUpdate 2025-01-27 lastUpdate 2025-03-15 lastUpdate 2025-11-27 lastUpdate A01-2023.018 v3.0 The SWOT L3_LR_SSH product provides ocean topography measurements obtained from the SWOT KaRIn and nadir altimeter instruments, merged into a single variable. The dataset includes measurements from KaRIn swaths on both sides of the image, while the measurements from the nadir altimeter are located in the central columns. In the areas between the nadir track and the two KaRIn swaths, as well as on the outer edges of each swath (restricted to cross-track distances ranging from 10 to 60 km), default values are expected. SWOT L3_LR_SSH is a cross-calibrated product from multiple missions that contains only the ocean topography content necessary for thematic research (e.g., oceanography, geodesy) and related applications. This product is designed to be simple and ready-to-use, and can be combined with other altimetry missions. The SWOT L3_LR_SSH product is a research-orientated extension of the L2_LR_SSH product, distributed by the SWOT project (NASA/JPL and CNES). SWOT L3_LR_SSH is managed by the SWOT Science Team project DESMOS. The "Expert" version of SWOT L3_LR_SSH (the "Basic" version is the subject of a separate metadata sheet) includes each algorithm, correction, or external model incorporated into the SWOT L3_LR_SSH product as a separate layer. In addition to the SSH anomalies, this "Expert" version also includes mean dynamic topography (as in the "Basic" version), backscatter coefficient (sigma0), mean sea surface and geostrophic currents (absolute and anomalies). CDS-AVISO onGoing Helpdesk AVISO aviso@altimetry.fr pointOfContact CDS-AVISO distributor CNES/CLS originator CNES funder https://sextant.ifremer.fr/geonetwork/srv/api/records/8c961685-cecb-41d9-b2d9-2a22cdd3d0c2/attachments/2023_SWOT_L3_logo.png Oceanographic geographical features Oceanographic geographical features Caractéristiques géographiques océanographiques GEMET - INSPIRE themes, version 1.0 GEMET - INSPIRE themes, version 1.0 2018-07-27T14:39:48 publication 2018-07-27 publication geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme Sea Surface Topography Sea Surface Topography Topographie de la surface de la mer Cersat - Parameter Cersat - Parameter 2025-12-09 publication geonetwork.thesaurus.local.theme.cersat_parameter SWOT SWOT SWOT Cersat - Project Cersat - Project 2025-12-09 publication geonetwork.thesaurus.local.theme.cersat_project 5 days 5 days 5 jours Cersat - Latency Cersat - Latency 2025-12-09 publication geonetwork.thesaurus.local.theme.cersat_latency /Ocean Circulation/Ocean Currents /Ocean Circulation/Ocean Currents /Tides/Tidal Height /Tides/Tidal Height /Sea Surface Topography/Sea Surface Height /Sea Surface Topography/Sea Surface Height Cersat - GCMD parameter Cersat - GCMD parameter 2024-01-04 publication geonetwork.thesaurus.external.theme.GCMDparameter CDS-AVISO CDS-AVISO CDS-AVISO Centre de données ODATIS Centre de données ODATIS 2026-01-19 publication geonetwork.thesaurus.local.theme.odatis_centre_donnees /Observational data/satellite /Observational data/satellite /Données d'observation/satellite Type de jeux de donnée ODATIS Type de jeux de donnée ODATIS 2025-12-09 publication geonetwork.thesaurus.local.theme.type_jeux_donnee Tides Tides Marées Currents Currents Courants Sea surface height Sea surface height Hauteur de la surface de la mer ODATIS aggregation parameters and Essential Variable names ODATIS aggregation parameters and Essential Variable names 2025-07-29 publication geonetwork.thesaurus.external.theme.NVS.OD1 Update Update None None Open Licence Open Licence Licence Ouverte "The SWOT L3_LR_SSH product, derived from the L2 SWOT KaRIn low rate ocean data products (NASA/JPL and CNES), is produced by the DUACS team and distributed by AVISO as part of the DESMOS Science Team project". AVISO/DUACS, 2024. SWOT Level-3 KaRIn Low Rate SSH Expert (v3.0) [Data set]. CNES. https://doi.org/10.24400/527896/A01-2023.018. "The SWOT L3_LR_SSH product, derived from the L2 SWOT KaRIn low rate ocean data products (NASA/JPL and CNES), is produced by the DUACS team and distributed by AVISO as part of the DESMOS Science Team project". AVISO/DUACS, 2024. SWOT Level-3 KaRIn Low Rate SSH Expert (v3.0) [Data set]. CNES. https://doi.org/10.24400/527896/A01-2023.018. "The SWOT L3_LR_SSH product, derived from the L2 SWOT KaRIn low rate ocean data products (NASA/JPL and CNES), is produced by the DUACS team and distributed by AVISO as part of the DESMOS Science Team project". AVISO/DUACS, 2024. SWOT Level-3 KaRIn Low Rate SSH Expert (v3.0) [Data set]. CNES. https://doi.org/10.24400/527896/A01-2023.018. aa2927ad-d1d6-4867-89d3-1311bc11e6bb de48c5b5-18f7-4829-ba0e-78f3dff047ac 785031bd-c54f-4a9b-a10e-7f76df114481 grid 2 oceans -180.00 180.00 -80.00 80.00 2023-03-29 pass L3 NetCDF NetCDF 4 https://tds-odatis.aviso.altimetry.fr/thredds/catalog/L3/SWOT_KARIN-L3_LR_SSH.html https://tds-odatis.aviso.altimetry.fr/thredds/catalog/L3/SWOT_KARIN-L3_LR_SSH.html WWW:LINK SWOT L3_LR_SSH Expert SWOT L3_LR_SSH Expert THREDDS THREDDS THREDDS https://swotst.aviso.altimetry.fr/fileadmin/user_upload/SWOTST2023/postersPI/faugere_ocean_l3_PIproject.pdf https://swotst.aviso.altimetry.fr/fileadmin/user_upload/SWOTST2023/postersPI/faugere_ocean_l3_PIproject.pdf WWW:LINK Other document Other document Poster at SWOT Science Team 2023, Dibarboure et al. SWOT Level-3 Overview algorithms and examples Poster at SWOT Science Team 2023, Dibarboure et al. SWOT Level-3 Overview algorithms and examples https://swotst.aviso.altimetry.fr/fileadmin/user_upload/SWOTST2023/20230920_ocean_2_regional_calval/16h30-Dibarboure_level3.pdf https://swotst.aviso.altimetry.fr/fileadmin/user_upload/SWOTST2023/20230920_ocean_2_regional_calval/16h30-Dibarboure_level3.pdf WWW:LINK Other document Other document Presentation at SWOT Science Team 2023, Dibarboure et al. SWOT Level-3 Overview algorithms and examples Presentation at SWOT Science Team 2023, Dibarboure et al. SWOT Level-3 Overview algorithms and examples https://swot-community.github.io/SWOT-galleries/cnes.html https://swot-community.github.io/SWOT-galleries/cnes.html WWW:LINK Software Software SWOT Ocean data tutorials SWOT Ocean data tutorials SWOT Ocean data tutorials https://www.aviso.altimetry.fr/en/missions/current-missions/swot/orbit.html https://www.aviso.altimetry.fr/en/missions/current-missions/swot/orbit.html WWW:LINK Other document Other document AVISO SWOT Orbit files (kml and shapefile) for the 1-day and 21-day orbits AVISO SWOT Orbit files (kml and shapefile) for the 1-day and 21-day orbits https://www.aviso.altimetry.fr/fileadmin/documents/data/tools/handbook_duacs_SWOT_L3.pdf https://www.aviso.altimetry.fr/fileadmin/documents/data/tools/handbook_duacs_SWOT_L3.pdf WWW:LINK User guide User guide Product User Manual (handbook) Product User Manual (handbook) Guide utilisateur (handbook) https://www.aviso.altimetry.fr/fileadmin/documents/data/tools/KaRIn_L3_v2content_20250115.pdf https://www.aviso.altimetry.fr/fileadmin/documents/data/tools/KaRIn_L3_v2content_20250115.pdf WWW:LINK Product notices Product notices SWOT L3_LR_SSH v2.0: planned changes, rationale, expected improvements and known issues SWOT L3_LR_SSH v2.0: planned changes, rationale, expected improvements and known issues https://doi.org/10.5194/os-21-283-2025 https://doi.org/10.5194/os-21-283-2025 WWW:LINK Web link (URL) Web link (URL) Dibarboure, G., Anadon, C., Briol, F., Cadier, E., Chevrier, R., Delepoulle, A., Faugère, Y., Laloue, A., Morrow, R., Picot, N., Prandi, P., Pujol, M.-I., Raynal, M., Tréboutte, A., and Ubelmann, C.: 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), Ocean Sci., 21, 283–323 Dibarboure, G., Anadon, C., Briol, F., Cadier, E., Chevrier, R., Delepoulle, A., Faugère, Y., Laloue, A., Morrow, R., Picot, N., Prandi, P., Pujol, M.-I., Raynal, M., Tréboutte, A., and Ubelmann, C.: 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), Ocean Sci., 21, 283–323 Dibarboure, G., Anadon, C., Briol, F., Cadier, E., Chevrier, R., Delepoulle, A., Faugère, Y., Laloue, A., Morrow, R., Picot, N., Prandi, P., Pujol, M.-I., Raynal, M., Tréboutte, A., and Ubelmann, C.: 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), Ocean Sci., 21, 283–323 https://www.aviso.altimetry.fr/fileadmin/documents/data/tools/KaRIn_L3_v3content_20251125.pdf https://www.aviso.altimetry.fr/fileadmin/documents/data/tools/KaRIn_L3_v3content_20251125.pdf WWW:LINK Product notices Product notices SWOT L3_LR_SSH v3.0: planned changes, rationale, expected improvements and known issues SWOT L3_LR_SSH v3.0: planned changes, rationale, expected improvements and known issues https://www.odatis-ocean.fr/donnees-et-services/acces-aux-donnees/catalogue-complet#/metadata/785031bd-c54f-4a9b-a10e-7f76df114481 https://www.odatis-ocean.fr/donnees-et-services/acces-aux-donnees/catalogue-complet#/metadata/785031bd-c54f-4a9b-a10e-7f76df114481 WWW:LINK Web link (URL) Web link (URL) Altimetry product SWOT Level-3 Low Rate SSH - Technical Altimetry product SWOT Level-3 Low Rate SSH - Technical Produit altimétrique SWOT Niveau 3 Low Rate SSH - Technical https://doi.org/10.24400/527896/A01-2023.018 https://doi.org/10.24400/527896/A01-2023.018 DOI Digital Object Identifier (DOI) Digital Object Identifier (DOI) SWOT L3_LR_SSH Expert SWOT L3_LR_SSH Expert Production and restricted distribution of the Expert SWOT L3_LR_SSH (2-km) version 0.3 product derived from the beta pre-validated L2_LR_SSH version 1.0 (summer 2023 reprocessing). Production and restricted distribution of the Expert SWOT L3_LR_SSH (2-km) version 0.3 product derived from the beta pre-validated L2_LR_SSH version 1.0 (summer 2023 reprocessing). v0.3 2023-12-22 Production and distribution of the Expert SWOT L3_LR_SSH (2-km) version 1.0 product derived from the L2_LR_SSH version C for both the Calibration (cycles 474 - 578) and Science (cycles 1 - 17) phases. Production and distribution of the Expert SWOT L3_LR_SSH (2-km) version 1.0 product derived from the L2_LR_SSH version C for both the Calibration (cycles 474 - 578) and Science (cycles 1 - 17) phases. v1.0 2024-05-07 Production and distribution of the Expert SWOT L3_LR_SSH (2-km) version 1.0.2 product for both the Calibration (cycles 474 - 578) and Science (cycle 1 - ongoing) phases. Production and distribution of the Expert SWOT L3_LR_SSH (2-km) version 1.0.2 product for both the Calibration (cycles 474 - 578) and Science (cycle 1 - ongoing) phases. v1.0.2 2024-09-10 Production and distribution of the Expert SWOT L3_LR_SSH (2-km) version 2.0 product for both the Calibration (cycles 474 - 578) and Science (cycle 1 - ongoing) phases. Production and distribution of the Expert SWOT L3_LR_SSH (2-km) version 2.0 product for both the Calibration (cycles 474 - 578) and Science (cycle 1 - ongoing) phases. v2.0 2025-01-27 Production and distribution of the Expert SWOT L3_LR_SSH (2-km) version 2.0.1 product for both the Calibration (cycles 474 - 578) and Science (cycle 1 - ongoing) phases. Production and distribution of the Expert SWOT L3_LR_SSH (2-km) version 2.0.1 product for both the Calibration (cycles 474 - 578) and Science (cycle 1 - ongoing) phases. v2.0.1 2025-03-15 Production and distribution of the Basic and Expert SWOT L3_LR_SSH (2-km) version 3.0 product for both the Calibration (cycles 474 - 578) and Science (cycles 1-42) phases. Production and distribution of the Basic and Expert SWOT L3_LR_SSH (2-km) version 3.0 product for both the Calibration (cycles 474 - 578) and Science (cycles 1-42) phases. v3.0 2025-11-27