基于模型的模式簡縮極化干涉數(shù)據(jù)目標分解
doi: 10.11999/JEIT140550 cstr: 32379.14.JEIT140550
基金項目:
國家自然科學(xué)基金(61431018, 41101335)資助課題
Model-based Target Decomposition with Mode Compact Polarimetric SAR Interferometry Data
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摘要: 基于模型的目標分解是極化合成孔徑雷達(SAR)的一個重要應(yīng)用，基于模型目標分解依賴于極化數(shù)據(jù)僅能獲得各散射機制的能量信息。該文將基于模型的分解技術(shù)應(yīng)用到模式的簡縮極化干涉SAR(C-PolInSAR)數(shù)據(jù)中，對互相關(guān)矩陣進行分解，在獲得各散射機制功率的同時獲得對應(yīng)的散射相位中心。該文首先推導(dǎo)出3種散射機制簡縮極化SAR干涉觀測下散射模型，然后運用數(shù)值計算方法進行目標分解，最終求解出各散射機制的功率貢獻及相位中心高度信息。仿真數(shù)據(jù)驗證了該算法的有效性，分析了不同波段及不同地表參數(shù)對分解結(jié)果的影響。
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關(guān)鍵詞:
- 合成孔徑雷達(SAR) /
- 模式簡縮極化 /
- 簡縮極化干涉SAR /
- 模型目標分解
Abstract: The model-based target decomposition is one of the most fundamental applications to the polarimetry SAR. However, it can only retrieve the power information of three scattering mechanisms with polarimetric SAR data. By applying this model-based decomposition technique to the mode Compact Polarimetric SAR Interferometry (C-PolInSAR) data and decomposing the cross correlation matrix, this study can obtain the power contributions of three scattering mechanisms as well as their scattering phase center. Firstly, this study introduces the models corresponding to the three scattering mechanisms under mode C-PolInSAR observation. Then, the targets can be decomposed by the numerical method, and finally both power contributions and scattering center of mechanisms are retrieved. The simulation data validate the effectiveness of the decomposition algorithm and the impacts of different wave-band and different ground parameters on the decomposition results are analyzed. -
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