合成孔径激光雷达(SAL)能够实现远距离目标的精细成像。由于SAL基于距离多普勒原理成像, 将地面场景映射到成像平面上会引起高程信息的丢失。提出了一种基于距离向扫描的SAL目标三维重建方法, 通过距离向扫描体制SAL得到一定扫描角度范围内的多条合成孔径图像, 利用相邻条带图像目标的重叠成像实现三维重建。基于TerraSAR图像仿真计算结果表明: 距离向扫描体制SAL可以实现目标的三维重建。

Fine imaging of long distance targets can be achieved by the synthetic aperture lidar (SAL). Due to the principle of range Doppler for SAL imaging, loss of altitude information is caused by the mapping for ground scenes to the imaging plane. A 3D reconstruction method of range scanning SAL was proposed in the paper. Multi synthetic aperture images in a certain scanning angle range were obtained by the range scanning SAL. Then, the 3D reconstruction was conducted through the overlap imaging of adjacent strip images for targets. On the basis of results simulated by TerraSAR, the 3D reconstruction for targets was realized using the range scanning SAL.