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首页> 外文期刊>Geoscience and Remote Sensing, IEEE Transactions on >Three-Dimensional Scattering Center Extraction Based on Wide Aperture Data at a Single Elevation
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Three-Dimensional Scattering Center Extraction Based on Wide Aperture Data at a Single Elevation

机译：基于单高度高孔径数据的三维散射中心提取

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摘要

A methodology to reconstruct the 3-D scattering center model from the data with wide azimuthal aperture at a single elevation, such as those collected in turntable or circular synthetic aperture radar configurations, is proposed in this paper. The wide azimuthal aperture is divided into overlapped subapertures, and the 2-D scattering centers are extracted in each subaperture. These local scattering centers are rotated and mapped into the ground plane in the target coordinate system, where they are associated according to their location and amplitude consistency. Three-dimensional position of the scatterer is then estimated from the location variation of the 2-D points at different azimuths. The theoretical performance of the position estimator is analyzed, which reveals how the scatterers' azimuthal directivity and persistency affect the precision of the position estimates. The reconstructed model consisted of scattering centers described by their 3-D positions and scattering coefficient profiles at the specific depression angle. Examples using both point scatterers and computer-aided design models not only verify the validity of the methodology but also manifest the applicability of the reconstructed model in scattering analysis, data regeneration, and elevation extrapolation.
机译：本文提出了一种从单个仰角上具有宽方位角孔径的数据（例如在转盘或圆形合成孔径雷达配置中收集的数据）重建3-D散射中心模型的方法。宽方位角孔径分为重叠的子孔径，并且在每个子孔径中提取了二维散射中心。这些局部散射中心被旋转并映射到目标坐标系中的地平面中，根据它们的位置和振幅一致性在此进行关联。然后根据二维点在不同方位角上的位置变化估算散射体的三维位置。分析了位置估计器的理论性能，揭示了散射体的方位角方向性和持久性如何影响位置估计的精度。重建的模型由散射中心组成，这些散射中心由其3-D位置和特定俯角的散射系数曲线描述。使用点散射体和计算机辅助设计模型的示例不仅验证了该方法的有效性，而且还证明了所重建模型在散射分析，数据再生和高程外推中的适用性。

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