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Estimation of soil moisture from multi-polarized SAR data over wheat coverage areas

文献类型： 外文期刊

作者： Yang, Guijun 1 ; Shi, Yuechan 1 ; Zhao, Chunjiang 1 ; Wang, Jihua 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Beijing Res Ctr Informat Technol Agr, Beijing 100097, Peoples R China

关键词： multi-polarized SAR;wheat water content;soil moisture

期刊名称：2012 FIRST INTERNATIONAL CONFERENCE ON AGRO-GEOINFORMATICS (AGRO-GEOINFORMATICS)

ISSN： 2334-3168

年卷期： 2012 年

页码：

收录情况： SCI

摘要： Radar data has important implications in agricultural fields monitoring, particularly in the retrieval of the crop height, leaf area index (LAI) and soil moisture information. The objective of this study was to estimate soil moisture contents based on multi-polarized synthetic aperture radar (SAR) data acquired over wheat fields. The soil moisture inversion algorithm was based on semi-empirical backscattering models and the prior estimation of wheat heights (h) and wheat water contents (WC) from SAR data(RADARSAT-2). The co-polarized correlation coefficient (rho(vvhh)) and the ratio of the absolute value of the cross polarization to the crop height (Lambda(vh)) were analyzed with respect to variations in wheat height and wheat water content. The results showed average relative errors of 14%, 32% and 24% for the retrieval of wheat height, wheat water content and soil moisture, respectively.

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