Terrain Observation Using Ground-based Interferometric Millimeter-wave SAR Imaging

Meng Jiang, Hongjun Wei, Chuheng Tang, Hui Zhang, Gang Xu
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Abstract

Synthetic aperture radar (SAR) has been widely applied to terrain observation as an enhanced sensor for all-weather and all-day functions. In this paper, a ground-based millimeter-wave multi-channel interferometric SAR (InSAR) system design and high-resolution imaging algorithm are proposed, which is characterized by small-size, low-cost, and high-precision. Firstly, the frequency-domain imaging algorithm of chirp-scaling is adopted to realize the range cell migration correction (RCMC) and two-dimensional focusing. Then, multi-channel interferometric processing is used to obtain the angle estimation of the imaging scene. Finally, experiments using measured data are performed to confirm the effectiveness of ground-based SAR imaging for terrain observation.
基于地面干涉毫米波SAR成像的地形观测
合成孔径雷达(SAR)作为一种全天候增强型传感器,已广泛应用于地形观测领域。提出了一种具有体积小、成本低、精度高等特点的地面毫米波多通道干涉SAR (InSAR)系统设计和高分辨率成像算法。首先,采用啁啾标度的频域成像算法,实现距离单元偏移校正和二维聚焦;然后,采用多通道干涉处理得到成像场景的角度估计;最后,利用实测数据进行了实验,验证了地面SAR成像在地形观测中的有效性。
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