基于相位补偿,对圆周合成孔径雷达(SAR)高分辨率三维成像方法进行了研究,对于高分辨率圆迹SAR 运动补偿来说,推导存在三维位置误差时点目标瞬时斜距表达式,对斜距误差与距离、方位之间的关联性,同时确定运动补偿方法与惯导参数圆迹SAR 相匹配。通过惯性参数反解隐函数,仿真结果可以看出:如果不通过运动补偿,此时点目标回波会发生严重散焦;采取回波补偿空变斜距误差处理A 点目标后,可以大大提高场景中心点和边缘点的聚焦水平,最终得到聚焦良好场景图像。

In this paper, based on phase compensation, the high-resolution three-dimensional imaging method of circular synthetic aperture radar is studied. For motion compensation of high-resolution circular track SAR, the instantaneous slant range expression of point target with three-dimensional position error is derived. The correlation between slant range error and range and azimuth is analyzed. At the same time, the motion compensation method is determined to match with inertial navigation parameter circular track SAR. Through the inverse implicit function of inertial parameters, the simulation results show that if the motion compensation is not adopted, the point target echo will have serious defocusing; after processing point a target with echo compensation space variable slant distance error, the focus level of the center point and edge point of the scene can be greatly improved, and finally the good focus scene image can be obtained.

TN958.97

河南省教育科学“十三五”规划2019 年度一般课题《立德树人融入信息技术专业课程教学的研究与实践》((2019)-JKGHYB-0509)