机载干涉雷达数据的直接地学编码处理

Direct Geo-referencing Airborne InSAR Data

机载InSAR系统可以获取地面的高度信息,同时还能获取地面的SAR图像,因此机载InSAR可以获取地面的三维遥感信息。应用InSAR的图像和高度信息,结合飞机平台的三维位置和速度信息,依据SAR斜距-多普勒构像方程进行图像和DEM的地理编码处理,能够将SAR图像和DEM直接校正到大地坐标系统中,从而给出地面的三维遥感信息。通过对机载InSAR实际飞行数据像的处理,证明了该方法的可行性。

Terrain Altitude can be acquired using airborne interferometric SAR （InSAR） while it acquires the SAR image of the ground. Therefore, InSAR is a new kind of remote sensing technology which can acquire 3D remote sensing information. Geo-reference processing of SAR image and DEM which are generated by InSAR is discussed in this paper. We use the 3D position and velocity of the airplane to geo-reference the InSAR data basing on the range-Doppler principle of SAR, so the SAR image and DEM can be rectified into geodetic coordinates. The method is demonstrated through processing InSAR flight data.