星载合成孔径雷达影像几何校正

为达到从遥感图像中恢复事物本来形状的目的，研究了基于距离多普勒(rang Doppler, RD)模型的星载合成孔径雷达影像几何校正原理，并提出了改进的R D解算算法，给出了基于该算法的几何校正全过程。构建了新的牛顿迭代核，计算得到了简化，校正速度得到了提高。新算法从方位向和距离向这两个方向上同时迭代，校正效果比仅在方位向上迭代的解算算法稳定。通过仿真数据进行了验证和比较，实验结果表明了新校正算法的可行性与有效性。

Geometrical rectification for space-borne synthetic aperture radar

To reflect the actual shape of the aim from the remote sense image, the space borne SAR image geometrical rectification theory is researched based on rang Doppler (RD) model. The improved R D solution arithmetic is provided. The whole rectification course is presented using the new arithmetic. The processing speed is enhanced for the new Newton iterative kernel design. The stability performance is advanced because of the iterative course is both at the azimuth and the range directions. Through the experiment with simulation data, it is shown that the new rectification arithmetic is feasible and effective.