The relationship between the leaf area index (LAI) of rice and the C-band SAR vertical/horizontal (VV/HH) polarization ratio

被引：45

作者：

Chen, Jinsong ^{[1
]}

Lin, Hui ^{[1
]}

Huang, Chudong ^{[2
]}

Fang, Chaoyang ^{[1
]}

机构：

[1] Chinese Univ Hong Kong, Inst Space & Earth Informat Sci, Hong Kong, Hong Kong, Peoples R China

[2] Zhejiang Univ Technol, Coll Civil Engn & Architecture, Hangzhou, Zhejiang, Peoples R China

来源：

INTERNATIONAL JOURNAL OF REMOTE SENSING | 2009年 / 30卷 / 08期

关键词：

SOIL-MOISTURE; ENVISAT ASAR; MODEL; BACKSCATTERING; VEGETATION; BIOMASS;

D O I：

10.1080/01431160802609700

中图分类号：

TP7 [遥感技术];

学科分类号：

081102 ; 0816 ; 081602 ; 083002 ; 1404 ;

摘要：

We investigated the relationship between the leaf area index (LAI) of rice and the ENVISAT Advanced Synthetic Aperture Radar (ASAR) vertical/horizontal (VV/HH) polarization ratio. Four alternating polarization ASAR images of swaths IS4 and IS5 over rice fields were used in the study. The VV/HH polarization ratio correlates well with the field-measured LAI and an empirical relationship was established to estimate the LAI of rice using the VV/HH polarization ratio. A theoretical radiative transfer model was adopted to analyse the relationship. The error of the estimated LAI was 0.17 for the test site and a better correlation was found when LAI was less than 3.5. The results suggest that ASAR alternating polarization data can be used to estimate the LAI of rice for wide-area monitoring of rice growth.

引用

页码：2149 / 2154

页数：6

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