| 基于起伏地形的干涉SAR回波数据仿真 |
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| 引用本文： | 汪丙南,陈立福,向茂生.基于起伏地形的干涉SAR回波数据仿真[J].宇航学报,2011(9). |
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| 作者姓名： | 汪丙南 陈立福 向茂生 |
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| 作者单位： | 中国科学院电子学研究所微波成像技术国家重点实验室;中国科学院研究生院; |
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| 摘 要： | 地形起伏造成SAR图像几何畸变,从而对回波数据产生重要影响,基于此提出一种基于起伏地形的干涉SAR回波数据仿真方法。建立了地距几何仿真方案,通过插值对地面目标点进行重采样,有效地实现了SAR图像中几何畸变的仿真。提供了一种新的相关性复后向散射系数模型,考虑了散射系数幅度的随机起伏特性和两通道随机相位的相关性,进而建立时域回波信号模型,通过对方位回波信号插值,一定程度上减小了距离门取整带来的误差,最后给出干涉SAR回波数据的仿真流程。计算机仿真结果表明该算法不仅能有效体现干涉SAR图像中的几何畸变,而且验证了相关性后向散射模型和回波信号模型的正确性。
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| 关 键 词： | 干涉SAR 相关性后向散射系数 回波数据仿真 |
InSAR Echo Data Simulation Based on Undulated Terrain |
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| WANG Bing-nan,CHEN Li-fu,XIANG Mao-sheng.InSAR Echo Data Simulation Based on Undulated Terrain[J].Journal of Astronautics,2011(9). |
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| Authors: | WANG Bing-nan CHEN Li-fu XIANG Mao-sheng |
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| Institution: | WANG Bing-nan1,2,CHEN Li-fu1,XIANG Mao-sheng1(1.National Key Laboratory of Science and Technology on Microwave Imaging Institute of Electronics,Chinese Academy of Sciences,Beijing 100190,China,2.Graduate University of Chinese Academy of Sciences,Beijing 100039,China) |
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| Abstract: | Geometrical distortion which has a negative effect on echo signal often happens in SAR imagery of undulated terrain.An Interferometric SAR(InSAR) echo data simulator based on undulated terrain is presented in this paper.Ground range geometry is used to implement geometrical distortion simulation in echo signal through interpolation by scattering units from ground range geometry to slant range geometry.Considering random undulation of backscattering coefficients and coherence of random phase of them,a new co... |
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| Keywords: | InSAR Correlated backscattering coefficients Raw data simulation |
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