多基线层析SAR技术的研究现状分析

层析SAR技术是在干涉SAR （InSAR）基础上发展起来的一种信息反演技术。层析SAR技术弥补了传统InSAR技术在高程向上分辨能力缺失的不足，真正实现了距离向-方位向-高程向的三维成像。本文介绍了层析SAR成像的原理，讨论了成像过程中复图像配准、去斜、相位误差补偿及高程向成像等问题，总结了层析SAR成像的三类算法，分析了层析SAR技术在各领域的应用情况，最后指出了层析SAR成像技术目前存在的问题，并对未来层析SAR技术的发展趋势做出了展望。

The Research Status Analysis on Multi-baseline Tomographic SAR

Tomographic synthetic aperture radar ( tomographic SAR ) is an information inversion technology developed from the interferometric SAR ( InSAR ) .Tomographic SAR makes up the shortages of the traditional InSAR resolving ability loss in height direction,which really achieves three-dimensional imaging in the azimuth,range and height direction.This paper introduces the principle of tomographic SAR imaging,and discusses the problems about complex image registration,deramping,phase errors compensation and height direction imaging.In the same time,three types of tomographic SAR algorithms and the applications in various fields are studied and summarized.Eventually,the existing problems and developing trend of tomographic SAR imaging are discussed.