a1933f18-a909-4c04-9375-260c76390f54 Tarot Stephane IFREMER 02 98 22 40 55 Centre Bretagne - ZI de la Pointe du Diable - CS 10070 - 29280 Plouzané Brest France Stephane.Tarot@ifremer.fr pointOfContact 2025-11-01T15:42:25.373563Z ISO 19115-3:2018 - Remote Sensing 1.0 3 1388 584 14 false WGS 84 / NSIDC EASE-Grid 2.0 Global (EPSG:6933) EPSG 8.6 http://www.opengis.net/def/crs/EPSG/0/6933 CATDS-PDC L4OS SMOS-OI - Weekly optimal interpolation salinity field product from SMOS satellite and ISAS 2022-09-19 publication CATDS-PDC_L4OS_OI 344 This product contains weekly salinity field, based on SMOS satellite data, and ISAS (In-Situ Analysis System). The L4OS SMOS-OI product contains global Level 4 analyses of the of the Sea Surface Salinity (SSS), Sea Surface Density (SSD) and Sea Surface Spiciness (SSSp), along with Sea Surface Absolute Salinity (SSA), Conservative Temperature (SCT), surface thermal expansion coefficient (alpha) and haline contraction coefficient (beta). The SSS product is obtained using an optimal interpolation (OI) algorithm, that combines ISAS in situ SSS OI analyses and Soil Moisture Ocean Salinity (SMOS) satellite image to reduce large scale and temporally varying bias. The SSS L4 product outcome is then combined with satellite SST products to compute thermodynamic sea water parameters using TEOS-10 (Kolodziejczyk et al., 2021). Products from reprocessing RE07 are available for the period 01/2011 - 05/2021. Products from operational (OPER) processing are available since 06/2021. Reprocessed products and operational products are derived using the same algorithm and configuration, hence ensuring the temporal continuity. The base products, for all the CATDS-PDC (Centre Aval de Traitement des Données SMOS - Production & Dissemination Center) processing chains, are the SMOS L1B products from ESA (European Space Agency). From these, brightness temperatures at various incidence angles are reconstructed. The Sea Surface Salinity (SSS) are retrieved from multi-angular brightness temperatures through a maximum likehood Bayesian approach in which measured Tb and Tb simulated using a forward direct model are compared (see Zine et al. 2008 for a general description of the retrieval method, and pro_con table for a summary of the similarities/differences with respect to ESA level 2 ocean salinity processing). CATDS (CNES, IFREMER, LOPS) onGoing CATDS (CNES, IFREMER, LOCEAN, ACRI) support@catds.fr pointOfContact Nicolas Kolodziejczyk Ifremer/LOPS nicolas.kolodziejczyk@ifremer.fr author Ifremer/CERSAT support@catds.fr originator Ifremer/CERSAT support@catds.fr distributor CNES > Centre National d'Etudes Spatiales funder https://sextant.ifremer.fr/geonetwork/srv/api/records/639a918e-0711-4eff-965d-15a728acb27d/attachments/SMOS-OI.gif Oceanographic geographical features GEMET - INSPIRE themes, version 1.0 2018-01-01 publication 2018-07-27T14:39:48 publication geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme Salinity/Density Cersat - Parameter 2024-07-26 publication 2024-07-26 publication geonetwork.thesaurus.local.theme.cersat_parameter SMOS CATDS Cersat - Project 2025-07-31 publication 2025-07-31 publication geonetwork.thesaurus.local.theme.cersat_project 1 month Cersat - Latency 2024-07-26 publication 2024-07-26 publication geonetwork.thesaurus.local.theme.cersat_latency /Salinity/Density /Salinity Cersat - GCMD parameter 2024-01-04 publication 2024-01-04 publication geonetwork.thesaurus.external.theme.GCMDparameter CDS-SAT-CERSAT Centre de données ODATIS 2023-11-06 publication 2023-11-06 publication geonetwork.thesaurus.local.theme.odatis_centre_donnees /Observational data/satellite Type de jeux de donnée ODATIS 2024-10-15 publication 2024-10-15 publication geonetwork.thesaurus.local.theme.type_jeux_donnee /Imagery/Satellite Imagery Thèmes Sextant 2024-09-27 publication 2024-09-27 publication geonetwork.thesaurus.local.theme.sextant-theme Orthoimagery GEMET - INSPIRE themes, version 1.0 2018-01-01 publication 2018-07-27T14:39:48 publication geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme SMOS CATDS CPDC L4OS Ocean Salinity Ocean Product OI ISAS /Physical Oceanography/Salinity Variables ODATIS 2023-10-13 publication 2023-10-13 publication geonetwork.thesaurus.local.theme.odatis_variables Salinity ODATIS aggregation parameters and Essential Variable names 2025-07-29 publication 2025-07-29 publication geonetwork.thesaurus.external.theme.NVS.OD1 CC-BY (Creative Commons - Attribution) CATDS-PDC L4OS SMOS-OI - Weekly optimal interpolation salinity field product from SMOS satellite and ISAS. CATDS (CNES, IFREMER, LOCEAN, ACRI) https://doi.org/10.12770/639a918e-0711-4eff-965d-15a728acb27d When using this dataset in a publication, also cite the related work(s) with: Kolodziejczyk Nicolas, Hamon Michel, Boutin Jacqueline, Vergely Jean-Luc, Reverdin Gilles, Supply Alexandre, Reul Nicolas (2021). Objective analysis of SMOS and SMAP Sea Surface Salinity to reduce large scale and time dependent biases from low to high latitudes. Journal Of Atmospheric And Oceanic Technology, 38(3), 405-421. Publisher's official version : https://doi.org/10.1175/JTECH-D-20-0093.1 , Open Access version : https://archimer.ifremer.fr/doc/00665/77702/ grid 1 25 utf8 geoscientificInformation -180.00 180.00 -83.50 83.50 2010-12-27 composite L4 NetCDF netcdf 3 with 64 bit offset option https://doi.org/10.1175/JTECH-D-20-0093.1 WWW:LINK-1.0-http--publication-URL Reference Kolodziejczyk Nicolas, Hamon Michel, Boutin Jacqueline, Vergely Jean-Luc, Reverdin Gilles, Supply Alexandre, Reul Nicolas (2021). Objective analysis of SMOS and SMAP Sea Surface Salinity to reduce large scale and time dependent biases from low to high latitudes. Journal Of Atmospheric And Oceanic Technology, 38(3), 405-421. Publisher's official version : https://doi.org/10.1175/JTECH-D-20-0093.1 , Open Access version : https://archimer.ifremer.fr/doc/00665/77702/ https://data.catds.fr/cpdc/Ocean_products/GRIDDED/L4OS/ WWW:LINK Ifremer HTTPS access ext-catds-cpdc:catds2010@ftp.ifremer.fr/Ocean_products/GRIDDED/L4OS WWW:FTP FTP Access FTP https://www.catds.fr/Resources/Documentation WWW:LINK Product notices List of products, user manuals and algorithms documents /home/catds_diss/data/cpdc/exp/current/FTP/SM/GRIDDED/ NETWORK:LINK Intranet access Local path https://doi.org/10.12770/639a918e-0711-4eff-965d-15a728acb27d DOI Digital Object Identifier (DOI)