摘要
利用GPS控制点辅助合成孔径雷达干涉测量(interferometric synthetic aperture radar,InSAR)进行相位解缠能提高InSAR相位解缠的精度。首先提出了一种以多个GPS控制点为解缠起算点的多解缠起算点枝切线相位解缠算法;然后,针对上述算法仍可能存在解缠孤岛,且无法得到残差点解缠值、无法保证整周未知数的整周特性的问题,提出了结合上述算法和基于马尔柯夫随机场的GPS辅助InSAR相位解缠算法的综合算法。实验结果表明,综合算法结合了多解缠起算点枝切线相位解缠算法和基于马尔柯夫随机场的GPS辅助InSAR相位解缠算法的优势,解缠精度高、解缠范围大。
The precision of interferometric synthetic aperture radar（InSAR） phase unwrapping can be improved by aid of global positioning system（GPS）. In this paper, a new branch-cut phase unwrap- ping algorithm using several GPS control points as unwrapping initial points is proposed. However this algorithm cannot produce correct estimates in residues and isolated regions introduced by the placement of branch cuts. It cannot guarantee the integer properties of the unknown circle number. To solve these problems A new synthesis algorithm that combines the new algorithm with phase unwrap- ping algorithm with aid of GPS based on Markov random filed（MRF） is proposed. The experimental results show that the synthesis algorithm combines the advantages of new several unwrapping initial points branch-cut algorithms and algorithms based on MRF and can offer higher precision with greater spatial coverage.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2017年第5期630-636,共7页
Geomatics and Information Science of Wuhan University
基金
国家自然科学基金(41301400)~~
