Bare Surface Soil Moisture Estimation Using Double-Angle and Dual-Polarization L-Band Radar Data

文献类型： 外文期刊

第一作者： Shen, Xinyi

作者： Shen, Xinyi;Qin, Qiming;Mao, Kebiao;Mao, Kebiao;Hong, Yang;Zhang, Guifu

作者机构：

关键词： Advanced integral equation model (IEM) (AIEM);double angle;dual polarization;microwave remote sensing;soil moisture inversion

期刊名称：IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING （ 影响因子：5.6； 五年影响因子：6.086 ）

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收录情况： SCI

摘要： Based on today's most widely used surface scattering model, the advanced integral equation model (AIEM), this study proposes a novel soil moisture inversion model that estimates bare surface soil moisture using double-incidence angle and dual-polarized L-band radar data. Compared with previous studies at L-/C-band, the proposed method provides the estimation of soil moisture without referring to the measured soil roughness and eliminates the requirement of an initial dry season condition. The root-mean-square error (rmse) of volumetric soil moisture varies from 0.8% to 3.2% at different incidence-angle combinations validated by simulated solving and from 4.0% to 7.9% by field measurements when the paired incidence angles are not both large. In case the paired angels are both large, not particularly suitable for soil moisture estimation, the rmse increases to 10.3%. Therefore, this method is applicable to bare surface soil moisture retrieval when at least one of the incidence angles is not large.

分类号： P3

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