Embarqué sur la plateforme ENVISAT, le spectro-imageur MERIS développé par Thales Alenia Space a permis de mesurer, à partir 1993 et jusqu’en 2012 les paramètres environnementaux notamment couleur l’Océan au large zones côtières. Avec programme Copernicus l’Union Européenne s’est ouvert en 2014 une évolution vers des mesures opérationnelles grâce aux satellites Sentinel 3 dédiés océans équipés ...

This ATBD (Algorithm Theoretical Based Document) describes the proposed algorithm for Level 2 biophysical land products derived from MERIS top of canopy reflectance data with justification of the choices made. The biophysical land products considered are the following set of biophysical variables: LAI, fCover, CB ab B and LAI.CB ab B. The algorithm accepts as inputs the top of canopy reflectanc...

A sensitivity study has been conducted to identify how radiometric noises and calibration errors on the level-1 top-of-atmosphere reflectances are propagated through the atmospheric correction and how they contribute to errors on the retrieved marine reflectances. Computations were performed using Monte-Carlo calculations and various atmospheric correction combinations were tested for typical a...

The European Space Agency project for studies of cloud properties in the Climate Change Initiative programme (ESA-CLOUD-CCI) aims at compiling the longest possible time series of cloud products from one single multispectral sensor—The five-channel Advanced Very High Resolution Radiometer (AVHRR) instrument. A particular aspect here is to include corresponding products based on other existing (M...

Atmospheric correction is necessary to estimate the surface reflectance required within biophysical algorithms used to estimate canopy characteristics. Aerosol characterization is obviously one of the main problem in atmospheric correction because aerosol may vary rapidly with time and space. The objective of this study is to develop an autonomous aerosol correction method exploiting the inform...

Land Surface Temperature (LST) is one of the key parameters in the physics of land-surface processes on regional and global scales, combining the results of all surface-atmosphere interactions and energy fluxes between the surface and the atmosphere. With the advent of the European Space Agency (ESA) Sentinel 3 (S3) satellite, accurate LST retrieval methodologies are being developed by exploiti...

The objective of this study is to apply ENVISAT MERIS data in mapping mountain vegetation in Sweden. The Swedish mountain vegetation is characterized by mosaics of different land cover types; a single MERIS pixel (300 meter IFOV) can consist of several of these different land cover types. “Hard” classifications which produce a single thematic class per pixel often give a low accuracy. While man...

The aim of this study was to derive land cover products with a 300-m pixelresolution of Envisat MERIS (Medium Resolution Imaging Spectrometer) to quantify netprimary productivity (NPP) of conifer forests of Taurus Mountain range along the EasternMediterranean coast of Turkey. The Carnegie-Ames-Stanford approach (CASA) was usedto predict annual and monthly regional NPP as modified by temperature...

This paper overviews the evaluation and the performance of the Medium Resolution Imaging Spectrometer (MERIS) Global Vegetation Index (MGVI) algorithm which is implemented in the MERIS ground segment as the main land surface product, also called the Top Of Atmosphere Vegetation Index (TOAVI). MGVI values represent the Fraction of Absorbed Photosynthetically Active Radiation (FAPAR) which act as...