【作者】 王伟；

【导师】 邹斌；

【作者基本信息】 哈尔滨工业大学 ， 信息与通信工程， 2006， 硕士

【摘要】 干涉合成孔径雷达(Interferometric Synthetic Aperture Radar,简称InSAR)是在合成孔径雷达(Synthetic Aperture Radar,简称SAR)基础上发展起来的一项新的雷达成像技术。它继承了SAR的优点,能够全天时、全天候获取高精度的数字化三维地形数据,因此在军事、国民经济建设和科学研究中,有着极其广泛的应用领域。近年来,随着多波段InSAR系统的发展,利用多频率InSAR数据联合进行高程信息重建成为InSAR领域的研究热点。本文对多频率InSAR高程信息重建算法进行了深入的研究,并针对多频率InSAR的成像算法提出了一个较为完整的实现方案。本文首先回顾了InSAR成像的工作原理以及影响高程反演和干涉数据相干性的各种因素,并对InSAR成像处理的主要流程进行了深入的研究与探讨,为后续章节的展开提供了相应的理论铺垫。在此基础上,详细讨论了多频率InSAR高程信息重建的算法流程,并对多频率InSAR高程重建算法进行了深入的研究与探讨。这其中,针对的算法的缺点论文提出了一种基于相位展开的多频率最大似然估计(MLE)算法。接下来利用InSAR仿真数据及真实SIR-C数据对多频率InSAR高程重建算法进行实现,并对结果进行了分析比较。同时利用仿真数据对于整个成像系统的精度进行了测定,对成像前后图像误差的统计特性进行了分析,结果证明算法具有一定的适用性和准确度。最后,对整个研究工作作了总结,对进一步的研究方向和内容提出了作者的观点。更多还原

【Abstract】 Synthetic Aperture Radar interferometric (InSAR) is a new radar imaging technique developed from SAR. Carried forward the merit of SAR, it can provide accurate digital three-dimensional topographic measurement in all weather conditions day and night. Because of the wide and latent applications of InSAR in many areas like military, civil and scientific researches, InSAR is one of the most active fields in remote sensing nowadays. With the emerging of multi-frequency InSAR system, extraction of 3-D and variation information of earth surface using multi-frequency InSAR data has drawn more attention.In this dissertation, height reconstruction algorithm using multi-frequency InSAR data is systematically studied, and a more reasonable procedure for realizing the multi-frequency InSAR imaging is proposed.First, this dissertation provides an overview of principle of InSAR imaging, composition of signal processing procedure, and some factors that affect the DEM reversion. Then, a more detailed discussion on main steps of multi-frequency InSAR data processing, including some classical height reconstruction algorithm using multi-frequency InSAR data, is given. Due to the demerit of the algorithm, we present a new multi-frequency Maximum likelihood estimation (MLE) method based on traditional phase unwrapping method. The experiment results using the simulated and real data are given, and the comparation and analysis of them are also presented. Special stresss is laid on the precision of final DEM. The result of simulated data shows that the imaging flow is very universal and accurate.Finally, our whole work is summarized, and personal opinions about this study field are given. Reconstruction更多还原