TerraSAR影像干涉测量数据的地理编码方法

Geocoding method of interferometric data from TerraSAR images

InSAR技术广泛用于获取高精度的地形信息,但是经过干涉处理获得的干涉测量数据必须经过地理编码,才能得到可实用的DEM。本文针对高分辨率TerraSAR影像,提出了利用InSAR的影像和高度信息,结合卫星的位置矢量和速度矢量以及SAR距离-多普勒构像模型,进行高程图地理编码处理的方法,直接将干涉生成的DEM校正到所需的地面参考坐标系统中,以获取干涉数据的地面三维信息。通过试验,证明了该方法的可行性。

Now Interferometric Synthetic Aperture Radar （InSAR） technique is widely applied in extracting highly precise terrain information. However, in order to obtain practicable DEM, the interferometric height data from InSAR process must be geocoded. Aiming at high resolution TerraSAR-X image, the geoeoding method of height map was proposed in this paper by employing image and height information of InSAR and then combining with the satellite position and velocity vectors and SAR Range-Doppler model. With this method, the ungeocoded DEM from InSAR process could be rectified directly into the needed reference frame, which makes acqui- ring ground three-dimensional information from geocoded DEM possible. Experimental result has proved the validity of the method.