合成孔径雷达干涉测量原理与应用

合成孔径雷达（SAR）是一种微波相干成像方法，应用不同波段的雷达信号可以对地球表面不同的散射特性成像。合成孔径雷达干涉（InSAR）是将两个不同轨道位置或不同时间获得的复数SAR数据进行相位差分处理，从这些差分干涉数据中可以提取特别有用的信息，用于绘制地形图，测量诸如地震、火山、冰川运动等造成的地形变，研究植被覆盖特性、洋流等。介绍了InSAR的基本原理与应用，并对影响干涉结果的一些重要因素进行了分析。

SYNTHETIC APERTURE RADAR INTERFEROMETRY AND ITS APPLICATION

Synthetic aperture radar (SAR) is a coherent active microwave imaging method. In remote sensing it is used for mapping the scattering properties of the Earth's surface in the respective wavelength domain. Interferometric SAR (InSAR) exploits the phase differences of at least two single looking complex SAR images acquired from different orbit position and/or at different times. The information derived from these interferometric data sets can be used to measure several geophysical quantities, such as topography, deformations caused by earthquake, volcanoes, ice fields, glacier flows and ocean currents, vegetation properties, etc. This paper introduces the basic principles of InSAR and its application. Some factors that affect the quality of interferometric products are generally analyzed.