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Characterization of the Temporal and Spatial Variability of Soil Moisture through Multi-Temporal Analysis of ASAR Observations

机译:亚马观测多时态分析土壤水分的时间和空间变异性的特征

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In this paper, Synthetic Aperture Radar (SAR) based soil moisture retrieval results are presented using observations acquired over the Tibetan Plateau. Two different time series based methods are used for the retrieval of soil moisture. With method I, soil moisture is retrieved through scaling of the backscatter (驴掳) observations between the maximum and minimum observed 驴掳 at a specific location. For method II, soil moisture is retrieved using the Integral Equation Method (IEM, Fung et al. 1992), for which a site-specific effective surface roughness parameterization is obtained through model inversion using minimum observed 驴掳. The retrievals are validated against ground measurements and showed that using Method I and Method II soil moisture can be estimated with accuracies up to 0.056 and 0.035 cm3cm-3, respectively.
机译:在本文中,使用藏高原获得的观察来介绍基于合成孔径雷达(SAR)的土壤水分检索结果。基于两种不同的时间序列的方法用于土壤水分检索。通过方法I,通过在特定位置的最大和最小观察到的最大和最小观察到的展开的缩放来检索土壤水分。对于方法II,使用积分方程方法(IEM,Fung等人,1992)检索土壤水分,通过使用最小观察到的模型反转来获得位点特异性有效表面粗糙度参数化。检索检索针对地面测量验证,并显示使用方法I和方法II分别可以分别估计高达0.056和0.035cm 3CM-3的精度。

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