Roughness determination from multi-angular ASAR Wide Swath mode observations for soil moisture retrieval over the Tibetan Plateau
Conference: EUSAR 2014 - 10th European Conference on Synthetic Aperture Radar
06/03/2014 - 06/05/2014 at Berlin, Germany
Proceedings: EUSAR 2014
Pages: 3Language: englishTyp: PDF
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Authors:
Velde, Rogier van der; Su, Zhongbo (University of Twente, Faculty of Geo-Information Science and Earth Observation, The Netherlands)
Wen, Jun (Cold and Arid Regions Environmental and Engineering Institute/Chinese Academy of Sciences (CA-REERI/CAS), China)
Abstract:
Multi-angular ASAR WS mode data sets are used for the estimation of the Integral Equation Method surface scattering model surface roughness parameterization. The ASAR WS data sets selected for the roughness estimation are collected during the cold and dry winter of the western part of the Tibetan Plateau. The estimated surface roughness is subsequently assumed to be constant for the retrieval of soil moisture. The retrievals are validated using the in-situ measurements from the Tibetan Plateau Soil Moisture/Temperature Observatory (Tibet-Obs), which demonstrated a positive and biased agreement of the retrievals with the measurements.