0139e951-fcf0-4639-99d6-68372a020797 2026-03-24T14:19:05.911436Z ISO 19115-3:2018 - Remote Sensing 1.0 VENµS Level-2 Marine reflectances 2024-10-04 creation 2025-02-05 publication 1.0 This Level 2 product provides marine reflectances from the VENµS mission, processed with the Polymer algorithm, on a subset of sites with coastal or inland areas. VENµS (Vegetation and Environment monitoring on a New Micro-Satellite) is a Franco-Israeli satellite launched in 2017, dedicated to the fine and regular monitoring of terrestrial vegetation, in particular cultivated areas, forests, protected natural areas, etc. The images acquired in 12 spectral bands by a camera provided by CNES, on a selection of about one hundred scientific sites spread over the planet, are of high spatial (5 m) and temporal resolution. The lifetime of the VENµS satellite has been divided into two phases: a first phase VM1 at an altitude of 720 km with a 2-day revisit, a native spatial resolution of 5.3 m and a swath of 27.6 km from August 2017 to November 2020, and a second phase VM5 at an altitude of 560 km with a daily revisit, a native spatial resolution of 4.1 m and a swath of 21.3 km from March 2022 to July 2024. VENµS is the first sensor on board an orbiting satellite to combine such revisit frequency and spatial finesse for vegetation monitoring. A subset of sites with coastal areas or inland waters have been identified to generate Level 2 data dedicated to marine reflectance. The geographical areas covered are given through a kmz file, see below to download it. This Level 2 data product has been processed using the Polymer algorithm developed by Hygeos (https://hygeos.com/en/polymer/) and provides marine reflectances for the VENµS bands from 420 to 865 nm. These reflectances, without units, include a bidirectional normalization for the Sun at nadir and the observer at nadir. VENµS data products (Level-1, Level-2 and Level-3) are primarily generated with the MAJA algorithm, further information can be found on THEIA website: https://www.theia-land.fr/en/product/venus/ CDS-AVISO completed Helpdesk AVISO aviso@altimetry.fr pointOfContact CDS-AVISO distributor CNES funder CNES originator HYGEOS originator https://sextant.ifremer.fr/geonetwork/srv/api/records/0139e951-fcf0-4639-99d6-68372a020797/attachments/VEN%C2%B5S_reflectance.png VM5 time series on the VENµS site of Glorieuse Island in the French Southern and Antarctic Lands. CDS-AVISO Centre de données ODATIS 2026-01-19 publication geonetwork.thesaurus.local.theme.odatis_centre_donnees Variables ODATIS 2023-10-13 publication geonetwork.thesaurus.local.theme.odatis_variables National Services Observation 2025-07-21 publication 2025-07-21 publication geonetwork.thesaurus.local.theme.SNO reflectance /Ocean Optics /Ocean Optics/Ocean Color /Ocean Optics/Reflectance Cersat - GCMD parameter 2024-01-04 publication geonetwork.thesaurus.external.theme.GCMDparameter Ocean colour ODATIS aggregation parameters and Essential Variable names 2025-07-29 publication 2025-07-29 publication geonetwork.thesaurus.external.theme.NVS.OD1 /Observational data/satellite Type de jeux de donnée ODATIS 2025-12-09 publication geonetwork.thesaurus.local.theme.type_jeux_donnee CC-BY-NC (Creative Commons - Attribution, No commercial usage) The VENµS Level-2 marine reflectance product, produced by CNES and Hygeos as part of the VENµS project (CNES, ISA) is made freely available by AVISO". CNES, 2024. VENµS Level-2 Marine Reflectances (v1.0) [Data set]. CNES. https://doi.org/10.24400/527896/A01-2024.015. grid 5 utf8 oceans -180.00 180.00 -65.00 85.00 2017-11-27 L2 NetCDF https://tds-odatis.aviso.altimetry.fr/thredds/catalog/dataset-ocean-color-venus-l2-polymer/v1/catalog.html WWW:LINK VENµS Level-2 Marine Reflectances THREDDS https://tds-odatis.aviso.altimetry.fr/thredds/fileServer/dataset-ocean-color-venus-l2-polymer/ocean-color-venus-l2-polymer.kmz WWW:LINK Geographical areas covered (kmz file) Geographical areas covered (kmz file) https://www.theia-land.fr/en/product/venus/ WWW:LINK Web link (URL) Further information on THEIA, Venµs Surface Reflectance https://www.theia-land.fr/ces-imagerie-radiometrie/imagerie-optique-hr/ WWW:LINK Web link (URL) Further information on THEIA, Reflectance Venµs Level-2A https://geodes.cnes.fr/ WWW:LINK Web link (URL) GEODES website https://doi.org/10.3390/rs14143281 WWW:LINK-1.0-http--publication-URL Main publication link Dick, A., Raynaud, J.-L., Rolland, A., Pelou, S., Coustance, S., Dedieu, G., Hagolle, O., Burochin, J.-P., Binet, R., Moreau, A., 2022. VENμS: Mission Characteristics, Final Evaluation of the First Phase and Data Production. Remote Sensing 14, 3281. https://doi.org/10.1364/OE.19.009783 WWW:LINK-1.0-http--publication-URL Main publication link Steinmetz, F., Deschamps, P.-Y., Ramon, D., 2011. Atmospheric correction in presence of sun glint: application to MERIS. Optics Express 19, 9783–9800. https://doi.org/10.1117/12.2500232 WWW:LINK-1.0-http--publication-URL Main publication link Steinmetz, F., Ramon, D., 2018. Sentinel-2 MSI and Sentinel-3 OLCI consistent ocean colour products using POLYMER, in: SPIE Asia-Pacific Remote Sensing Proceedings. https://doi.org/10.1364/JOSA.44.000838 WWW:LINK-1.0-http--publication-URL Main publication link Cox, C., Munk, W., 1954. Measurement of the Roughness of the Sea Surface from Photographs of the Sun’s Glitter. J. Opt. Soc. Am. 44, 838. https://www.aviso.altimetry.fr/fileadmin/documents/data/tools/Polymer_VENuS_user_guide.pdf WWW:LINK Web link (URL) Manuel utilisateur https://doi.org/10.24400/527896/A01-2024.015 DOI Digital Object Identifier (DOI) V