Abstract
As a part of surface parameters retrieval from Wind scatterometer (WSC) data over the entire Sahelian belt, a study has been conducted over an agropastoral area in Niger, characterized by large land use heterogeneity. 9-year WSC data time series are analyzed over the study site. WSC response exhibit the typical behavior observed over Sahelian area. However, the yearly dynamic range of radar signal acquired at 45° of incidence angle exhibits very little interannual variation despite the biomass production variability. 7 ERS SAR images were analyzed in order to quantify the different land use contributions to the WSC radar response. The derived SAR �1 0 value extracted over the whole WSC resolution cell shows good agreement with WSC data. Wind scatterometer; Sahel; SAR; time series
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