ENVISAT和ALOS卫星SAR影像提取地表沉降的对比试验
Comparative Experiment of Land Subsidence Extraction from ENVISAT and ALOS Satellite SAR Images

本文介绍双轨法差分干涉测量中的数学模型及计算公式，并以ENVISAT和ALOS两种卫星得到的影像数据分析得到某一地区的地表沉降值，分析二者影像的不同点以及各自数据的特点。进行差分干涉处理，并进一步提取出地表沉降量，并且展开分析。对比解译和分析ENVISAT ASAR数据和ALOS PALSAR数据提取的差分干涉图和形变值，并最终得出二者卫星在提取地表形变中可行性的结论。
This paper introduces the mathematical model and calculation formula in the two-track differential interferometry, and analyzes the land subsidence value of a certain area by using the image data obtained from ENVISAT and ALOS satellites, and analyzes the differences between the two images and the characteristics of their respective data. Carry out differential interference processing, and further extract and analyze the surface settlement. Comparative interpretation and analysis of dif-ferential interferograms and deformation values extracted from ENVISAT ASAR data and ALOS PALSAR data, and ultimately a conclusion that the two satellites are feasible in extracting surface deformation is reached.