基于GAMMA软件的InSAR数据相位解缠分析比较

Analysis and Comparison of Phase Unwrapping of InSAR Data Based on GAMMA Software

以ERS影像和COSMO-SkyMed影像两种具有不同代表性的数据为例,着重介绍了GAMMA软件ISP模块中的InSAR数据相位解缠处理过程。通过实验分析得出,对于相干性较好的平原地区,枝切线区域生长法和最小费用流算法解缠结果一致,对于相干性较差的高山地区,两种方法都需分次解缠,但枝切线区域生长法对于相干性要求更高,且枝切线区域生长法的计算效率总是优于最小费用流算法。

Taking ERS and COSMO-SkyMed image which represents two types of data respectively as a case study,this paper focuses on introducing the process of phase unwrapping of InSAR data of ISP module in GAMMA software.The result of the experiments shows that in areas with good coherence,branch-cut region growing algorithm and MCF can obtain the same unwrapping result;in areas of bad coherence,both two methods need to unwrap repeatedly,but branch-cut region growing algorithm correlates greater with the coherence and branch-cut region growing algorithm is always higher in calculating efficiency than MCF.