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SAR Focusing using Multiple Trihedrals

机译:使用多个三面体的SAR聚焦

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摘要

A recent circular synthetic aperture radar data collection contained various vehicles arid calibration targets placed throughout a 5 km scene. By observing multiple orbits of the radar, the down-range distance measurements to scattering features show noticeable drift on the order of 2 m from orbit to orbit. The large scene contained 14 quad-trihedral calibration targets with radar cross sections that are similar to point targets in the elevation range of the scene. This paper presents an algorithm that uses the quad-trihedrals to generate global range focusing parameters and phase error corrections to the complex range profile. Qualitative and quantitative results show the focusing provides a significant improvement to wide-angle image registration and vehicle target discrimination.
机译:最近的圆形合成孔径雷达数据收集包含放置在整个5 km场景中的各种车辆和校准目标。通过观察雷达的多个轨道,到散射特征的近距离测量显示出从轨道到轨道大约2 m的明显漂移。大场景包含14个四面体校准目标,雷达横截面与场景高程范围内的点目标相似。本文提出了一种使用四面体的算法来生成全局范围聚焦参数和对复杂范围轮廓进行相位误差校正的算法。定性和定量结果表明,该聚焦技术可显着改善广角图像配准和车辆目标识别能力。

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