Copolarized and Cross-Polarized Backscattering From Random Rough Soil Surfaces From L-Band to Ku-Band Using Numerical Solutions of Maxwell's Equations With Near-Field Precondition

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題名:	Copolarized and Cross-Polarized Backscattering From Random Rough Soil Surfaces From L-Band to Ku-Band Using Numerical Solutions of Maxwell's Equations With Near-Field Precondition
作者:	任玄;Liao, Tien-Hao;Tsang, Leung;Huang, Shaowu;Niamsuwan, Noppasin;Jaruwatanadilok, Sermsak;Kim, Seung-bum;Ren, Hsuan;Chen, Kuan-Liang
貢獻者:	太空及遙測研究中心
關鍵詞:	Algorithms;Backscattering;Computation;Computational modeling;Correlation;Land surface;Mathematical models;Maxwell's equations;Near-field precondition;numerical maxwell solution;Polarization;polarization ratio;rough surface;Rough surfaces;Soil;Soil (material);Soil moisture;Soil surfaces;Surface impedance;Surface roughness;Three dimensional
日期:	2016-02-01
上傳時間:	2026-04-21 14:38:38 (UTC+8)
出版者:	Institute of Electrical and Electronics Engineers Inc.;New York: IEEE
摘要:	摘要： We extend the 3-D numerical method of Maxwell's equation (NMM3D) for rough soil surface scattering from L-band to C-, X-, and Ku-bands. We illustrate the results for copolarization, cross-polarization, and polarization ratio (HH/VV). Copolarized and cross-polarized backscattering coefficients from NMM3D are analyzed for frequency dependence, incident angle dependence, and soil moisture dependence. We also cross compare results from analytical and empirical models. The 16 × 16 squared wavelength (λ 2 ) of rough surface is applied for NMM3D using 256 processors on NSF Extreme Science and Engineering Discovery Environment clusters. Polarization ratio, HH/VV, is studied to address the feature of dependence on frequency for same fields (same physical parameters for the model). HH/VV is shown useful to provide additional information to study land surface. Results from NMM3D are also validated with POLARSCAT measurement data-1. NMM3D shows good agreement with data and better performance while considering copolarization, cross-polarization, and polarization ratio (HH/VV) together. The key advancement in computation efficiency in this paper is the implementation of a physically based near-field precondition algorithm in NMM3D to accelerate parallel computation. With precondition, the computation time is faster by ten times for larger root-mean-square height. 其他題名： TGRS 出版者： New York: IEEE 出版日期： 2016-02 出處： IEEE transactions on geoscience and remote sensing, 2016-02, Vol.54 (2), p.651-662 資源來源： IEEE Electronic Library (IEL) 版權： Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) 2016 識別號： ISSN: 0196-2892 識別號： EISSN: 1558-0644 識別號： DOI: 10.1109/TGRS.2015.2451671 識別號： CODEN: IGRSD2
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