【摘要】 星载SAR成像是一种微波成像,由于微波具有穿透云雾、雨雪等的特点,使得SAR能够不受天气和时间的限制而对地球扫描成像,这使得SAR具有一般光学成像所没有的优点。人们正积极探索把SAR数据用于测绘并来解决一些问题。考虑到卫星在短时间内的运动比较平稳,并且它的相对关系精确度高,本文主要从SAR成像的几何角度和两景影像的相对关系出发,分析了雷达成象的特点,进而探讨了从立体像对上提取DEM的方法,并就具体步骤做了进一步的阐述。更多还原

【Abstract】 The SAR loaded in satellite get images by the way of microwave. SAR has the advantage that optical images method can not to compare with, because microwave can pass through atmosphere containing cloud、snow、rain、mist and so on. Now people are actively exploring how to make good use of SAR date in the field of survey and mapping. Considering SAR’s stable motion and highly relative relations in a short time, this article mainly explains characteristics of Radar images and howto extract DEM from stereo SAR images,and then gives a detail explanation how to perform it.更多还原