Modification of the Extended Advanced IEM for Scattering From Randomly Rough Surfaces

被引：1

作者：

Yang, Jingsong ^{[1
]}

Li, Yongxing ^{[2
]}

Shi, J. C. ^{[3
]}

Du, Yang ^{[2
]}

机构：

[1] Minist Nat Resources, Inst Oceanog 2, State Key Lab Satellite Ocean Environm Dynam, Hangzhou 310012, Peoples R China

[2] Zhejiang Univ, Coll Informat Sci & Elect Engn, Hangzhou 310027, Peoples R China

[3] Chinese Acad Sci, Inst Digital Earth & Remote Sensing Applicat, Beijing 100101, Peoples R China

来源：

IEEE GEOSCIENCE AND REMOTE SENSING LETTERS | 2021年 / 18卷 / 02期

基金：

美国国家科学基金会;

关键词：

Scattering; Mathematical model; Rough surfaces; Surface roughness; Integral equations; Green' s function methods; Surface waves; Bistatic scattering; error function; integral equation method (IEM); rough surface; transition model;

D O I：

10.1109/LGRS.2020.2971532

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

In this letter, we modify the extended advanced integral equation model (EAIEM) for electromagnetic backscattering and bistatic scattering from rough surfaces with small to moderate heights. We extend the first-order approximation of the error function as introduced in the EAIEM model to the second order, in a hope to be more suitable for large roughness and high frequency. In addition, a new transition model for the reflection coefficient is proposed to make the dependences explicit on the mean surface curvature, frequency, and dielectric constant, whereas making no use of the complementary term, the effect of inadequate evaluation of this term is mitigated. Comparison with POLARSCAT data for backscattering and with European Microwave Signature Laboratory (EMSL) measurements for bistatic scattering demonstrates the validity of the updated model.

引用

页码：236 / 240

页数：5

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