InSAR技术中的相位解缠算法研究

InSAR 干涉测量的关键步骤。

3.1 引言

程信息，因此获得准确的相位差就是实现测量的关键。由于复数对

其相位的周期性，InSAR 根据两幅 SAR 复图像获得的干涉相位差值

是被周期折叠后位于 ( π ,π]之间的相位主值，它与真实的相位差值

之间存在着 2 kπ 差别。由式(2.13)可以表示它们之间的基本关系。

其中 φ 代表解缠相位， 代表缠绕相位。必须对 进行相位解缠，恢复

被模糊掉的相位周期，获得目标在两次成像中的真实相位差，才能

键步骤之一，其准确程度将直接决定数字高程图（DEM）和地表形

变探测的精度。

3.2 相位缠绕和解缠

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