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为了充分使用构架或受限飞行时获取的交向影像,本文对机载SAR交向立体模式及定位方法进行了研究。首先,简要比较了三种利用SAR影像提取DEM的方法,分析了机载雷达立体测量的意义。其次,研究了SAR交向立体获取方式及所获取立体影像对的特点。最后,应用两种立体定位模型,即距离-多普勒模型和多项式正射校正模型,对陕西某地1m分辨率SAR影像对进行了实验分析,取得了较好的定位精度。
In order to make full use of the cross-directional images obtained in the framework or limited flight, this paper studies on the three-dimensional mode and positioning method of airborne SAR. First, a brief comparison of three methods of extracting DEM using SAR images is made, and the significance of stereo measurement of airborne radar is analyzed. Secondly, the three-dimensional acquisition mode of SAR and the characteristics of stereoscopic pairs acquired are studied. Finally, two kinds of stereotactic model, namely distance-Doppler model and polynomial orthorectification model, are applied to experimentally analyze 1m resolution SAR images in a certain place of Shaanxi Province and obtain better positioning accuracy.