0f02fc28-cb86-4c44-89f3-ee7df6177e7b 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 2025-09-26T12:33:30.133353Z ISO 19115-3 - SEXTANT 1.0 3 1388 584 14 false WGS 84 / NSIDC EASE-Grid 2.0 Global (EPSG:6933) EPSG 8.6 CATDS-PDC L3OS 3Q mixed - Debiased average 10 days & monthly salinity field product from SMOS satellite (mixed orbits) 2022-02-14 publication CATDS-PDC_L3OS_3Q_mixed DOI:10.12770/0f02fc28-cb86-4c44-89f3-ee7df6177e7b This product contains average 10 days & monthly salinity field corrected from land-sea contamination and latitudinal bias, based on L2Q products, mixing ascending and descending orbits. CATDS (CNES, IFREMER, LOCEAN, ACRI) CATDS support@catds.fr author Jacqueline Boutin LOCEAN jb@locean-ipsl.upmc.fr principalInvestigator CATDS (CNES, IFREMER, LOCEAN, ACRI) support@catds.fr publisher Jean-Luc Vergely ACRI jean-luc.vergely@latmos.ipsl.fr principalInvestigator https://sextant.ifremer.fr/geonetwork/srv/api/records/0f02fc28-cb86-4c44-89f3-ee7df6177e7b/attachments/L3OS_3Q_2019.png L3OS_3Q_2019.png /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 L3OS Ocean Salinity 3Q Ocean Product CDS-CERSAT Centre de données ODATIS 2024-10-16 publication 2024-10-16 publication geonetwork.thesaurus.local.theme.odatis_centre_donnees Type de jeux de donnée ODATIS 2024-10-15 publication 2024-10-15 publication geonetwork.thesaurus.local.theme.type_jeux_donnee Variables ODATIS 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 /Données d'observation/satellite Type de jeux de donnée ODATIS 2024-10-15 publication geonetwork.thesaurus.local.theme.type_jeux_donnee Creative Commons license to apply : Attribution (BY) : http://creativecommons.org/licenses/?lang=en grid 1 utf8 geoscientificInformation -180.00 180.00 -83.50 83.50 2010-01-12 NetCDF netcdf 3 with 64 bit offset option https://data.catds.fr/cpdc/Ocean_products/GRIDDED/L3OS/RE07/MIR_CSQ3B_ WWW:DOWNLOAD RE07-MIXED RE07-MIXED - Reprocessed products (01/2010 - 05/2021), mixed orbits https://data.catds.fr/cpdc/Ocean_products/GRIDDED/L3OS/OPER/MIR_CSQ3B_ WWW:DOWNLOAD OPER-MIXED OPER-MIXED - Operational products (06/2021 - now), mixed orbits https://doi.org/10.13155/92266 WWW:LINK ATBD L3/L4 OS Algorithm Theoretical Basis Document L3/L4 OS http://www.catds.fr/content/download/68781/908673 WWW:LINK Pros/cons table http://doi.org/10.1016/j.rse.2018.05.022 WWW:LINK-1.0-http--publication-URL Reference Boutin J., Vergely J.L., Marchand S., D'Amico F., Hasson A., Kolodziejczyk Nicolas, Reul Nicolas, Reverdin G., Vialard J. (2018). New SMOS Sea Surface Salinity with reduced systematic errors and improved variability. Remote Sensing of Environment, 214, 115-134. Publisher's official version : http://doi.org/10.1016/j.rse.2018.05.022 , Open Access version : http://archimer.ifremer.fr/doc/00441/55254/ ftp://ftp.ifremer.fr/ WWW:DOWNLOAD FTP Access FTP Access - All products are also available by ftp : server ftp.ifremer.fr, login ext-catds-cpdc, passwd catds2010, path Ocean_products/GRIDDED/... (same relative paths as in the https links) https://www.catds.fr/sipad/ WWW:LINK CATDS Sipad CATDS Sipad - Web-based interactive tool which allows subsettings and temporal agregation. https://www.catds.fr/ WWW:LINK CATDS Web portal CATDS Web portal https://doi.org/10.12770/0f02fc28-cb86-4c44-89f3-ee7df6177e7b DOI DOI of the product 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 - https://doi.org/10.57780/SM1-e20cf57 - 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). The L3OS 3Q mixed product contains average 10 days & monthly salinity field corrected from land-sea contamination and latitudinal bias, based on L2Q products, at 2 spatial resolutions (25km, 50km), mixing ascending and descending orbits. Products from reprocessing RE07 are available for the period 01/2010 - 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. Note that links are only provided for the 50km spatial resolutions products. 25km resolution can be accessed by changing the product name (see below) These products are generated with a delay of 5 days after the end of the averaging period (Please see below for alternative 1-day delay products). File naming : SM_clas_MIR_CSQ3r__startdate_enddate_vvv_ccc_7 - clas : File class (OPER : operational mode, REXX : reprocessing xx) - r : A for 25km, B for 50km - startdate : sensing start date/time of the data (format yyyymmddThhmiss) - enddate : sensing end date/time of the data (format yyyymmddThhmiss) - vvv : version number of the processor generating the product - ccc : file counter File format : In each archive file (.tgz extension), there are two files - A Header file (.HDR), which is a text file, in XML Earth Explorer Header format - A Data file (.DBL.nc), which is a netcdf file, format variant 2 (netcdf 3 with 64 bits offset option) Alternative 1-day delay products : Since 07/2019, 1-day delay products are also available, in operational (OPER) processing only. These products are only available by FTP (i.e. not by Sipad). The paths and file names are identical, except that the "MIR" tags are replaced by "NRT". Reference : Boutin J., Vergely J.L., Marchand S., D'Amico F., Hasson A., Kolodziejczyk Nicolas, Reul Nicolas, Reverdin G., Vialard J. (2018). New SMOS Sea Surface Salinity with reduced systematic errors and improved variability. Remote Sensing of Environment, 214, 115-134. Publisher's official version : http://doi.org/10.1016/j.rse.2018.05.022 , Open Access version : http://archimer.ifremer.fr/doc/00441/55254/