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Summary of Proposal HYD0611

TitleContribution of ENVISAT, RADARSAT-2, ALOS and TERRASAR-X multi-polarisation radar data for monitoring agricultural surfaces.
Investigator BAUP, frederic - CESBIO, Physics
Team Member
Dr. Lopes, Armand - CESBIO, UPS, Physics
SummaryThe present proposal aims to evaluate the potentialities of combined multi-temporal and multifrequency ENVISAT, RADARSAT-2, PALSAR and TERRASAR-X radar data acquired at various incidence angles and full-polarization states for monitoring crops and cropping practices. The signal sensitivity will be analysed compared to surface parameters like soil moisture (at different depth by using Ground Penetrating Radar data), cropping practices (tillage, ploughing…), plant cropped (wheat, sunflower…), vegetation standing mass and height. The most suitable radar configuration (combining L, C and X band, incidence angle and polarisation) will be established to monitor the temporal variation of the surface parameters (soil moisture and vegetation biomass, height). The analysis will be performed at different scales from local to regional scales. The Methods consist in 1) process statistical analyses of reflectances combining all signal characteristics (wavelength, incidence angle and polarisation), 2) validate and upscale a coupled soil-vegetation backscattering model 3) develop and validate an inversion method (with an assimilation scheme) including microwave multifrequency models, ground and satellite data in order to estimate surface parameters. Complementaries with optical (FORMOSAT, SPOT, VENUS) and thermal (ASTER, MODIS) data will also be analysed. Products developed at the CESBIO laboratory such as Normalized Difference Vegetation Index (NDVI), Leaf Area Index (LAI) and biomass maps will be used in order to improve radar data analyses and inversion methods. Comparisons with SMOS data is also envisaged since the study area is located close to a Cal/Val SMOS site. This work will be supported by the CNES (Centre National d’Etudes Spatiales, France, Toulouse), the GHG (GreenHouse Gases) Europe project and the Fluxpyr project.

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