基于InSAR技术在山地区域DEM提取及精度评定

DEM Extraction in Mountainous Region by In SAR Technology and Precision Assessment

利用InSAR技术对四景ENVISAT-ASAR雷达数据进行DEM提取。简述了InSAR测高的原理,总结了SAR数据的处理方法。获取了两组研究区域DEM成果,经精度评定,成果能够满足1∶50 000比例尺DEM产品的精度要求。同时,实验证明InSAR技术可以快速地获取大面积DEM。

In this paper,InSAR technology was used to extract DEM of 4 ENVISAT-ASAR images. This paper briefly introduced the principle of InSAR height measurement and summarized the processing methods of SAR data. The results of two groups of research area DEM were obtained,and the precision can meet the precision requirement of 1 ∶ 50 000 DEM products. Meanwhile,the experimental results show that InSAR technology can quickly obtain large area DEM.