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斜距一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.

TN958