Motion Compensation for Synthetic Aperture Radar
Motion Compensation for Synthetic Aperture Radar
复制标题
DOI：
10.1109/taes.1975.308083
复制
发表时间：
1975-05
影响因子：
4.4
通讯作者：
J. Kirk
中科院分区：
文献类型：
--
作者：
J. Kirk
一种适用于所有SAR模式的通用运动补偿方法，即，描述了条带映射（侧视或斜视）、聚光灯（或望远镜）映射和多普勒波束锐化映射（DBS）。其基本思想是单位矢量的形成以及真实的照射天线和经过处理的合成天线对该单位矢量的从属性。所需的运动补偿量根据主运动减小路径的传递曲线来得出，即，平移、旋转（杠杆臂）和真实的天线稳定。传递曲线通过将期望的运动谱除以所需的灵敏度谱来获得。对于典型参数，最关键的运动减少路径是平移路径。杠杆臂和真实的天线稳定路径不那么关键，但也必须实现。
A generalized motion compensation approach applicable to all SAR modes, i.e., strip mapping (side-looking or squint), spotlight (or telescope) mapping, and Doppler beam sharpened mapping (DBS), is described. The basic concept is the formation for unit vector ¿ and the slaving of the real illuminating antenna and the processed synthetic antenna to this unit vector. The amount of motion compensation which is required is developed in terms of transfer curves for the main motion reduction paths, i.e., translational, rotational (lever arm), and real antenna stabilization. The transfer curves are obtained by dividing the expected motion spectrum by the required sensitivity spectrum. The most critical motion reduction path for typical parameters is shown to be the translational path. The lever arm and real antenna stabilization paths are less critical, but must also be implemented.