植被的微波散射与吸收特征

张钟军; 施建成; 栾金哲

doi:10.11834/jrs.20060479

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植被的微波散射与吸收特征
The Microwave Scattering and Absorption Characteristics of Vegetation
2006年第4期页码：537-541
纸质出版：2006
DOI： 10.11834/jrs.20060479
稿件说明：

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[1]张钟军,施建成,栾金哲.植被的微波散射与吸收特征[J].遥感学报,2006(04):537-541. DOI： 10.11834/jrs.20060479.

ZHANG Zhong-jun~. The Microwave Scattering and Absorption Characteristics of Vegetation[J]. Journal of Remote Sensing, 2006, (4): 537-541. DOI： 10.11834/jrs.20060479.

摘要

被动微波遥感中大尺度像元内植被种类多种多样并且分布不均匀

较低频率下像元尺度内的植被影响可以根据单个散射体的散射与衰减特性获得。本文讨论了任意朝向的各类植被散射体的计算问题。其中叶片和针叶的散射采用了一般化Rayle igh-Gans计算;杆的散射采用了无限长近似理论。关于各类散射体的衰减

本文比较了散射系数和吸收系数之和

与前向散射定理的结果

并对前向定理的适用性进行了讨论。

Abstract

In passive microwave remote sensing

the vegetation layer within a footprint is of great diversities and anisotropy.Under lower frequencies the vegetation effect could be obtained by statistical average of the scattering and extinction characteristics of single scatter.In this paper the scattering calculation methods of an arbitrary scatter are discussed

where Raleigh-Gans theory is used for disc and needle

and infinite length approximation theory is employed for cylinder.Regarding the extinction of every kind of scatter

the results of the sum of scattering and absorption coefficient

and that from forward scattering theory are compared and discussed.