基于三角网与Tarjan算法的PS点点云分割及轨道误差改正

摘要

The PS point cloud segmentation and orbital ramp correction based on the Delaunay Triangulation and Tarjan' s algorithm was proposed in order to amend the estimation errors of orbital ramp correction during the PSInSAR processing.The PSInSAR results of Kashi prefecture recorded by the Envisat satellite of European Space Agency show that:Comparing with the traditional methods,this algorithm could eliminate the orbital errors effectively and avoid the errors caused by the not-unicom unwrapping area.And the algorithm is applicable to the areas with continuous distribution of PS points in the entire images and could be coverd basically.%为改正在PSInSAR处理过程中对轨道误差项的估计错误,提出一种基于三角网和Tarj an算法的PS点云分割及轨道误差项纠正算法.利用欧空局Envisat卫星SAR图像对喀什地区的PSInSAR的计算结果表明:该算法可有效消除轨道误差项,与传统方法相比,可规避因不联通解缠区域造成的偏差.该算法适用于整幅影像中存在PS点连续密集分布且能基本覆盖的区域.