在不考虑地形起伏的情况下,从机载合成孔径雷达数据采集几何关系和成像原理的角度,针对正侧视和小斜视情况提出了计算机载SAR图像像素点经纬度的一种准确而实用的方法,给出了从雷达图像上的像素点计算其经纬度的详细过程,并结合某实际机载SAR成像参数对影响定位精度的因素包括高度测量误差,航向角、俯仰角、横滚角误差和多普勒中心、多普勒调频率误差进行了详细的分析。

In the case of the side-glance angle of beam is zero or small,an algorithm has been developed to determine the latitude and longitude of an arbitrary pixel in an air-borne strip mode SAR image without consideration of the hypsography.The algorithm which is based on the geometry of radar receiving signal from scatters and the principle of imaging is precise and applicable.In this paper the procedure of determining the latitude and longitude of an arbitrary pixel is introduced in detail.The factors including error of the plane's height,error of the plane's angle on the bow,angle of pitch and rolling angle and error of the doppler parameters are also analyzed based on a SAR in the paper.

TN957.52 TN959.73