SOIL MOISTURE CHARACTERIZATION USING MULTI-ANGULAR POLARIMETRIC RADARSAT-2 DATASETS

摘要

The use of multi-angular polarimetric datasets instead ofrnthe standard single-angular data is considered to be arnsolution to improve the effectiveness of bare soil characterization.rnHowever, the potential of polarimetric parametersrnderived from the multi-angular SAR datasetsrnwas studied little, particularly for the C band polarimetricrndatasets. In this study, the sensitivity of polarimetricrndescriptors from single and multiple incidence anglernacquisitions is investigated against in situ soil moisturernand surface roughness. The behaviours of polarimetricrndescriptors are compared with the simulations usingrnintegral equation model (IEM). The results show thatrnthe variation of polarimetric descriptors in term of soilrnmoisture as well as surface roughness is in accordancernwith the IEM simulations; even though the variationrnscale is different between the real data and simulationrn(The simulation is more sensitive than the real data).rnThe polarimetric sensitivity found in this study providesrnadditional evidences for the potential utilization ofrnmulti-angular polarimetric SAR datasets for bare surfacerncharacterization.