InSAR相位分解及其在生成DEM和研究地震形变场中的应用

Phase Decomposition of Interferometric Syntheic Aperture Radar and Relevant Application in DEM Formation and Research on Earthquake Deformation Field

摘要:

InSAR是极具发展潜力的微波遥感新技术,可应用于数字高程模型的产生、制图和大范围微小地表形变的测量。考虑参考面、地形和地表形变等因素,本文从几何角度分析和讨论了In-SAR的相位分解,并给出了各相位分量的函数表达式,阐述了地表高程和形变信息提取的基本原理。最后以JERS和ENVISAT卫星数据为例,展示了合成孔径雷达干涉测量在生成数字高程模型和提取地震形变场中的应用及其数据处理过程。

Abstract:

InSAR（Interferometric Syntheic Aperture Radar） is a new microwave remote sensing technique with great developing potential. It can be applied to form DEM（Digital Elevation Model）, mapping and monitoring minor terrestrial deformation in large area. In this paper, considering the reference surface, terrain and surface deformation, the interferometric phase decomposition in InSAR is analyzed and discussed from geometry point, and the relevant function expressions of specific phase components are presented. Then the basic principle of generating DEM and acquiring deformation is described. Finally, taking JERS and ENVISAT data as example, application and process of DEM formation and earthquake deformation field abstraction are displayed.