从机载合成孔径雷达(SAR)距离一多普勒原理出发研究目标定位问题,文中采用多项式拟和平台位置,修正了零多普勒条件方程,建立了适合机载SAR的构像模型和坐标系变换关系,提出了一种实时无参考点定位情况下的雷达图像经纬度计算方法,并对影响定位精度的参数包括平台测量误差、多普勒中心估计误差和载机高度误差进行定量分析,实验结果表明该方法能有效地校正SAR图像存在的几何变形,定位误差精度与理论分析基本一致.

From the principle of airborne SAR range-doppler model,this paper studies the problem of target location.First,the location of the sensor is approximated by polynomials and the condition of zero doppler equation is revised.On this baris,then we propose a fast algorithm to estimate the latitude and longitude of airborne SAR based on R-D equations and coordinate transformations,in which the location of reference points isn't required.The parameters including platform measurement error,doppler center error,and...

TN958