3a747dbb-c01a-462e-aa24-58ca7018ed5a CERSAT Exploitation fpaf@ifremer.fr editor 2026-02-26T14:05:36.282272Z ISO 19115-3:2018 - Remote Sensing http://www.opengis.net/def/crs/EPSG/0/4326 High-resolution L3 Sea Surface Wind from Multi-Year Satellite Measurements over the Atlantic Sea, for Copernicus Marine Service 2025-06-24 creation 2025-06-24 publication WIND_ATL_PHY_HR_L3_MY_012_106 1.0 This daily High-Resolution (HR) Level 3 gridded wind product is derived from Copernicus Sentinel-1 SAR (Synthetic Aperture Radar) observations, over the North Western Atlantic ("ATL" area). It is based on the European Space Agency (ESA) Level-2 OCN products at the highest available resolution. Although L2-OCN products already contain wind vectors, those are calculated using the CMOD5.n Geophysical Model Function (GMF) applied to the co-polarized (co-pol) VV channel (emitting in Vertical polarization and receiving in Vertical polarization). This VV GMF was mapped from scatterometer sensors (Hersbach et al., 2007) which are only able to use co-pol measurements. However, these co-pol GMF are known to lose sensitivity for wind above 20 m/s. Therefore, wind based on such GMF alone, are known to under-estimate wind speed (Polverari et al., 2022). For the L3 products winds based on SAR, we take advantage of the available cross-polarized (cross-pol) VH channel (emitting in Vertical polarization and receiving in Horizontal polarization) for which GMF were specifically derived based on C-Band SAR (Mouche et al., 2017, Mouche et al., 2019). Winds estimated from the combination of both the co-pol and cross-pol channels are referred to as dual-polarization (or dual-pol) winds. As shown in Mouche et al. (2019), taking advantage of the dual polarization strongly improves the wind estimation for high wind conditions thanks to the much greater VH channel sensitivity compared to VV. These new wind estimations are then gridded with a 0.012 degree resolution (between 0.5 and 1.2 km in zonal direction depending on the latitude and 1.3 km in meridional direction) using a cylindrical equidistant projection, independently for ascending and descending satellite passes and for each satellite (so 4 wind fields are available per day for two satellites). This dataset is generated over all Sentinel-1 mission time series starting from March 2018 and updated in delayed mode with a 4-months delay. It is also produced for 4 other different European areas. This dataset is produced and disseminated in the frame of Copernicus Marine Service. onGoing Helpdesk CERSAT cersat@ifremer.fr pointOfContact https://sextant.ifremer.fr/geonetwork/srv/api/records/3a747dbb-c01a-462e-aa24-58ca7018ed5a/attachments/WIND_ATL_PHY_HR_L3_MY_012_106.jpg 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 Ocean Winds Cersat - Parameter 2025-12-09 publication geonetwork.thesaurus.local.theme.cersat_parameter CMEMS Cersat - Project 2025-12-09 publication geonetwork.thesaurus.local.theme.cersat_project Less than 4 months Cersat - Latency 2025-12-09 publication geonetwork.thesaurus.local.theme.cersat_latency /Ocean Winds/Surface Winds Cersat - GCMD parameter 2024-01-04 publication geonetwork.thesaurus.external.theme.GCMDparameter CDS-CERSAT Centre de données ODATIS 2026-01-19 publication geonetwork.thesaurus.local.theme.odatis_centre_donnees /Observational data/satellite Type de jeux de donnée ODATIS 2025-12-09 publication geonetwork.thesaurus.local.theme.type_jeux_donnee ODATIS aggregation parameters and Essential Variable names 2023-11-27 publication 2023-11-27 publication geonetwork.thesaurus.external.theme.NVS.OD1 National Services Observation 2024-01-04 publication 2024-01-04 publication geonetwork.thesaurus.local.theme.SNO Research Infrastructure 2023-12-22 publication 2023-12-22 publication geonetwork.thesaurus.local.theme.IR None CC-BY (Creative Commons - Attribution) High-resolution L3 Sea Surface Wind from Multi-Year Satellite Measurements over the Atlantic Sea. E.U. Copernicus Marine Service Information (CMEMS). Marine Data Store (MDS). DOI: 10.48670/mds-00339 (Accessed on DD-MMM-YYYY) grid 1 oceans -20.00 13.00 26.00 62.00 North Atlantic 2018-03-13 composite L3 NetCDF-4 https://data.marine.copernicus.eu/product/WIND_ATL_PHY_HR_L3_MY_012_106/services WWW:LINK Copernicus Marine Service Data Access https://documentation.marine.copernicus.eu/PUM/CMEMS-WIND-PUM-012-100to109.pdf WWW:LINK User guide Product User Manual https://documentation.marine.copernicus.eu/QUID/CMEMS-WIND-QUID-012-100to109.pdf WWW:LINK Processing and validation Quality Information Document https://data-cersat.ifremer.fr/data/ocean-wind/sar-s1-cmems/l3/ WWW:LINK Ifremer HTTPS server https://doi.org/10.48670/mds-00339 DOI Digital Object Identifier (DOI)