摘要
相位解缠是InSAR处理的关键步骤,解缠结果的可靠性和稳定性影响着InSAR测量的性能。从干涉条纹频率与相位解缠结果之间的内在联系出发,推导了干涉条纹频率与干涉复数值之间的严密关系式,设计了基于瞬时频率估计的相位解缠方法,采用多套干涉数据获取的干涉图进行了相位解缠实验,验证了基于瞬时频率估计方法进行相位解缠的可行性。
Phase unwrapping is a key step in the processing of Interferometric Synthetic Aperture Radar （InSAR）. Its reliability and availability affect the performance of InSAR. In this paper, the rigorous formula for instantaneous frequencies and complex interferometric data was educed. And the phase unwrapping algorithm based on estimation of instantaneous frequencies was designed. Some interferometric data were used to do phase unwrapping experiments. Their results validated this algorithm.
出处
《测绘科学技术学报》
北大核心
2009年第1期33-35,40,共4页
Journal of Geomatics Science and Technology
基金
国家自然科学基金资助(40771142,40871213)
国家西部1∶5万地形图空白区测图工程资助
信息工程大学测绘学院学员科技创新项目资助(X0707)
中国博士后科学基金资助
关键词
干涉图
合成孔径雷达干涉测量
相位解缠
瞬时频率
interferogram
interferometric synthetic aperture radar
phase unwrapping
instantaneous frequency
