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THE USE OF GNSS SIGNALS FOR ESTIMATING SOIL MOISTURE : THE LEIMON EXPERIMENT

The use of microwave radar and radiometer in estimating soil moisture and vegetation parameters of land has shown a good potential. However, both experimental activities and theoretical results seem to indicate that important limitations to the actual use of monostatic radar exist. They are: in soil moisture applications the simultaneous disturbing effects of soil roughness and vegetation cover; in vegetation monitoring, the early saturation of its response with respect to plant biomass. As far as radiometric measurements are concerned, the ground resolution required in many applications remains a challenging issue.