基于InSAR技术对西部高山地区DEM的重建

摘要

合成孔径雷达干涉测量技术是一种获取地面数字高程模型(DEM)的新技术.介绍利用InSAR获取DEM的基本流程,阐述相位解缠的理论方法以及基线估计中获取地面控制点的方法与原则,通过实验获取西部某高山地区的DEM,并与SRTM DEM作比较、分析,总结出其存在局限性的原因.%InSAR (Synthetic Aperture Radar Interferometry) is a new technology for achieving Digital Elevation Model (DEM). The paper introduces the basic flow of achieving DEM with InSAR technology and describes the theoretical method of phase unwrapping, at the same time the method and principle of obtaining ground control points among baseline evaluation processing are brought forward. Then, a DEM of the western mountain area was obtained, which also is compared and analyzed with SRTM-DEM. The reasons for their existence are summarized at last.