合成孔径雷达成像的系统模型与反演。

A system model and inversion for synthetic aperture radar imaging.

机构信息

Dept. of Electr. and Comput. Eng., State Univ. of New York, Buffalo, Amherst, NY.

出版信息

IEEE Trans Image Process. 1992;1(1):64-76. doi: 10.1109/83.128031.

Abstract

A system model and its corresponding inversion for synthetic aperture radar (SAR) imaging are presented. The system model incorporates the spherical nature of a radar's radiation pattern at far field. The inverse method based on this model performs a spatial Fourier transform (Doppler processing) on the recorded signals with respect to the available coordinates of a translational radar (SAR) or target (inverse SAR). It is shown that the transformed data provide samples of the spatial Fourier transform of the target's reflectivity function. The inverse method can be modified to incorporate deviations of the radar's motion from its prescribed straight line path. The effects of finite aperture on resolution, reconstruction, and sampling constraints for the imaging problem are discussed.

摘要

提出了一种合成孔径雷达（SAR）成像的系统模型及其相应的反演方法。该系统模型包含了远场雷达辐射模式的球形性质。基于该模型的反演方法对记录的信号相对于平移雷达（SAR）或目标的可用坐标进行空间傅里叶变换（多普勒处理）。结果表明，变换后的数据提供了目标反射率函数的空间傅里叶变换的样本。该反演方法可以修改为包含雷达运动偏离其规定的直线路径的情况。讨论了有限孔径对成像问题的分辨率、重建和采样约束的影响。