干涉合成孔径雷达目标的三维重建
3D reconstruction of targets in interferometeric SAR
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摘要: 干涉SAR目标的三维重建是利用干涉SAR的基本测量值和干涉SAR成像的几何关系确定地面目标点的三维位置。现有算法均建立在平面电磁波、平地假设的基础上,不可避免地引入严重的位置误差。该文从干涉SAR的基本方程入手,在球形地球和球面电磁波的普遍模型基础上,推导出干涉SAR三维重建的解析解,并将该算法与现有三维重建算法进行了数值计算比较。Abstract: 3D reconstruction of targets in Interferometric SAR (InSAR) refers to determine targets 3D position based on principal measurements of radar and the InSAR imaging geom-etry. Several algorithms have boon proposed for InSAR. These algorithms rely on simplifying assumptions, such as the; flat oarth approximation and the plane wave approximation. Signifi-cant location errors of targets have been introduced by these approximations. In this paper, a new algorithm is proposed on the models of spherical earth and spherical wave. The solution is given in a closed form only using the measured quantities: orbit, parameters, range time, Doppler shift, and interferomotric phase. This analytical solution demonstrates more exact than the existing algorithms.
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