785031bd-c54f-4a9b-a10e-7f76df114481 AVISO aviso@altimetry.fr editor 2026-04-22T15:43:29.898529Z 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 - Technical Altimetry product SWOT Level-3 Low Rate SSH - Technical Produit altimétrique SWOT Niveau 3 Low Rate SSH - Technical 2025-12-18 publication 2025-12-16 creation 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) and managed by the SWOT Science Team project DESMOS. The "Technical" version of SWOT L3_LR_SSH (the "Basic", "Expert" and "Unsmoothed" versions are the subject of separate metadata sheets) includes additional parameters and geophysical fields that may be of interest for certain applications or that provide an alternative solution to those used in the core (Basic/Expert) products. CDS-AVISO onGoing Helpdesk AVISO-SWOT aviso-swot@altimetry.fr pointOfContact CDS-AVISO distributor CNES/CLS originator CNES funder Helpdesk AVISO aviso@altimetry.fr pointOfContact https://sextant.ifremer.fr/geonetwork/srv/api/records/785031bd-c54f-4a9b-a10e-7f76df114481/attachments/2023_SWOT_L3_logo.png SWOT L3 SSH Credits: CNES NASA UKSA CSA SWOT L3 SSH Credits: CNES NASA UKSA CSA 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 /Sea Surface Topography/Sea Surface Height /Sea Surface Topography/Sea Surface Height /Tides/Tidal Height /Tides/Tidal 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 L3 L3 L3 Cersat - Processing level Cersat - Processing level 2025-12-09 publication geonetwork.thesaurus.local.theme.cersat_processing_level 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 and made freely available by AVISO and DUACS teams as part of the DESMOS Science Team project". AVISO/DUACS, 2024. SWOT Level-3 KaRIn Low Rate SSH Technical (v3.0) [Data set]. CNES. https://doi.org/10.24400/527896/A01-2025.009. "The SWOT L3_LR_SSH product, derived from the L2 SWOT KaRIn low rate ocean data products (NASA/JPL and CNES), is produced and made freely available by AVISO and DUACS teams as part of the DESMOS Science Team project". AVISO/DUACS, 2024. SWOT Level-3 KaRIn Low Rate SSH Technical (v3.0) [Data set]. CNES. https://doi.org/10.24400/527896/A01-2025.009. 8c961685-cecb-41d9-b2d9-2a22cdd3d0c2 de48c5b5-18f7-4829-ba0e-78f3dff047ac aa2927ad-d1d6-4867-89d3-1311bc11e6bb grid 2 oceans -180.00 180.00 -80.00 80.00 Global 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 Technical 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 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 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 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 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 Product User Manual (handbook) Product User Manual (handbook) Guide utilisateur (handbook) https://doi.org/10.5194/os-21-283-2025 https://doi.org/10.5194/os-21-283-2025 WWW:LINK 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 SWOT L3_LR_SSH product: planned changes, rationale, expected improvements and known issues SWOT L3_LR_SSH product: planned changes, rationale, expected improvements and known issues https://www.odatis-ocean.fr/donnees-et-services/acces-aux-donnees/catalogue-complet#/metadata/aa2927ad-d1d6-4867-89d3-1311bc11e6bb https://www.odatis-ocean.fr/donnees-et-services/acces-aux-donnees/catalogue-complet#/metadata/aa2927ad-d1d6-4867-89d3-1311bc11e6bb WWW:LINK Web link (URL) Produit altimétrique SWOT (KaRIn + nadir) Niveau 3 Océan - version Basic https://doi.org/10.24400/527896/A01-2025.009 https://doi.org/10.24400/527896/A01-2025.009 https://doi.org/10.24400/527896/A01-2025.009 DOI Digital Object Identifier (DOI) Production and distribution of the Technical SWOT L3_LR_SSH (2-km) version 3.0 product for both the Calibration (cycles 474 - 578) and Science (cycle 1 - ongoing) phases. Production and distribution of the Technical SWOT L3_LR_SSH (2-km) version 3.0 product for both the Calibration (cycles 474 - 578) and Science (cycle 1 - ongoing) phases. v3.0 2025-12-15