摘要
低空目标和地表目标的成像不尽相同，针对低空目标SAR成像的研究微乎其微。为弥补此欠缺，在推导出低空目标的SAR成像输出后，从有效成像区域、阴影效应以及多航过成像三个方面分析了低空目标的成像特性，确定了SAR的有效成像区域，给出了十种典型情况下利用低空目标阴影信息提取目标高度的公式，并指出了多航过飞行对低空目标成像的影响。实例验证了高度提取方法的有效性。该工作为SAR目标的成像特性研究开辟了新思路。
There are some differences between SAR imagery for targets at low altitude and targets on the ground surface. Little Studies relates to the SAR imagery for targets at low altitude. To make up for this lack, after the derivation of SAR imaging output for targets at low altitude, SAR imaging characteristics are analyzed from the three aspects of effective imaging area, shadow effect and multi- pass imaging. The effective imaging area is determined, the height extraction formulas in ten typical situations are presented using shadow information, and the influence of multi-pass flights on imaging is analyzed. An actual example proves the validity of the presented formula. This research breaks a new path for SAR target imaging characteristic study.
出处
《电子对抗》
2012年第1期21-25,30,共6页
Electronic Warfare
关键词
合成孔径雷达
低空目标
成像区域
阴影
高度
Synthetic Aperture Radar （SAR）
targets at low altitude
imaging area
shadow
height
