基于公共余数最优估计的多通道干涉SAR高程重建方法

An elevation reconstruction method of multi-channel InSAR based on optimal estimation of common remainder

针对多通道干涉SAR高程重建方法计算效率较低的问题,提出了一种基于公共余数最优估计的多通道干涉SAR快速高程重建方法。该算法首先对干涉相位去除平地效应后,得出每幅干涉图像任意一个像素对应的缠绕干涉相位,构造出关于干涉相位模糊数的同余方程组;然后利用最优估计法求解出带噪声余数的公共余数的最优估计值,求解出各目标的高程值;最后再利用改进措施得到更高精度的高程重建结果。试验数据处理结果表明,该方法使得多通道干涉SAR高程重建的计算效率有了显著提升。

To improve computational efficiency of multichannel InSAR elevation reconstruction,a rapid elevation reconstruction method based on the optimal estimation of remainder was proposed.Firstly,after the removal of the flat-earth effect,the wrapped interferometric phase of each pixel was drawn and congruence equations of interferometric phase fuzzy number wereconstructed.Secondly,the optimal estimation method was used to solve the optimal estimation of the common remainder with noise,and the elevation of each target was solved.Finally,the improved method was used to get higher precision reconstruction results.Experimental results show that the algorithm significantly improves the computational efficiency of multichannel InSAR elevation reconstruction.