International audienceABSTRACT. This paper presents a methodology for monitoring vegetation in the Pays de Brest using new series of Sentinel-1 satellite images. This work consists of establishing an interferogram method of the main types of vegetation in order to achieve the coherence of a multi-temporal Sentinel-1 radar image series, in SLC format (C band, VV and VH polarization), between 2015 and 2016. We then proceed to calculating the radar backscatter coefficient based on Sentinel 1 images in GRD format. Multi-date and multipolarized color compositions will be made to detect changes. MOTS-CLES : Télédétection, suivi temporel, Sentinel1, polarisation radar, végétation.1. CNB Brest 52 Allée du Bot, 29200 Brest RESUME. Cet article présen...