Scattering by two-dimensional rough surfaces:: comparison between the method of moments, Kirchhoff and small-slope approximations

被引:30
作者
Soriano, G [1 ]
Guérin, CA [1 ]
Saillard, M [1 ]
机构
[1] Fac Sci & Tech St Jerome, UMR CNRS 6133, Inst Fresnel, F-33397 Marseille 20, France
来源
WAVES IN RANDOM MEDIA | 2002年 / 12卷 / 01期
关键词
D O I
10.1088/0959-7174/12/1/305
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We use a rigorous numerical code based on the method of moments to test the accuracy and validity domains of two popular first-order approximations, namely the Kirchhoff and the small-slope approximation (SSA), in the case of two-dimensional rough surfaces. The experiment is performed on two representative types of surfaces: surfaces with Gaussian spectrum, which are the paradigm of single-scale surfaces, and ocean-like surfaces, which belong to the family of multi-scale surfaces. The main outcome of these computations in the former case is that the SSA is outperformed by the Kirchhoff approximation (KA) outside the near-perturbative domain and in fact is quite unpredictable in that its accuracy does not depend only on the slope. For ocean-like surfaces, however, SSA behaves surprisingly well and is more accurate than the KA.
引用
收藏
页码:63 / 83
页数:21
相关论文
共 24 条
  • [1] [Anonymous], 1991, THEORY WAVE SCATTERI
  • [2] [Anonymous], INTEGRAL EQUATIONS S
  • [3] Tapered wave with dominant polarization state for all angles of incidence
    Braunisch, H
    Zhang, Y
    Ao, CO
    Shih, SE
    Yang, YE
    Ding, KH
    Kong, JA
    Tsang, L
    [J]. IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 2000, 48 (07) : 1086 - 1096
  • [4] THE SMALL SLOPE APPROXIMATION REFLECTION COEFFICIENT FOR SCATTERING FROM A PIERSON-MOSKOWITZ SEA-SURFACE
    BROSCHAT, SL
    [J]. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 1993, 31 (05): : 1112 - 1114
  • [5] A unified directional spectrum for long and short wind-driven waves
    Elfouhaily, T
    Chapron, B
    Katsaros, K
    Vandemark, D
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 1997, 102 (C7): : 15781 - 15796
  • [6] Scattering from natural rough surfaces modeled by fractional Brownian motion two-dimensional processes
    Franceschetti, G
    Iodice, A
    Migliaccio, M
    Riccio, D
    [J]. IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 1999, 47 (09) : 1405 - 1415
  • [7] Electromagnetic scattering on fractional Brownian surfaces and estimation of the Hurst exponent
    Guérin, CA
    Saillard, M
    [J]. INVERSE PROBLEMS, 2001, 17 (03) : 365 - 386
  • [8] Backscattering enhancement of electromagnetic waves from two-dimensional perfectly conducting random rough surfaces: A comparison of Monte Carlo simulations with experimental data
    Johnson, JT
    Tsang, L
    Shin, RT
    Pak, K
    Chan, CH
    Ishimaru, A
    Kuga, Y
    [J]. IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 1996, 44 (05) : 748 - 756
  • [9] A numerical study of the composite surface model for ocean backscattering
    Johnson, JT
    Shin, RT
    Kong, JA
    Tsang, L
    Pak, K
    [J]. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 1998, 36 (01): : 72 - 83
  • [10] Li S.-Q, 2001, IEEE T ANTENN PROPAG, V47, P752