Estimation de l'humidité du sol à l'aide de radar et d'images optiques sur les zones de prairies

Abstract

International audienceThe purpose of this study was to develop an inversion approach to estimate soil moisture over Grassland areas by coupling SAR and optical data. A time series of radar (TerraSAR-X and COSMO-SkyMed) and optical (SPOT 4/5, LANDSAT 7/8) images were acquired over an agriculture region in southeastern France. In most cases, the optical and radar images were not separated by more than four days. Ground-truth measurements of volumetric soil moisture and vegetation descriptors were performed simultaneously with image acquisitions