车载毫米波SAR对近海域的成像及监测

Imaging and surveillance of near maritime region by vehicle-mounted millimeter wave SAR

针对近海域监测的应用背景,介绍了一种用于近海监测的车载毫米波SAR系统,该系统灵活机动、费用低廉,结合了毫米波和SAR的特点,能够实现对近岸静止和活动目标的高分辨成像及监测。在此对某次实验获得的SAR数据进行了成像处理,由于在系统要求的作用距离范围内,距离单元数不是很多,可对每个距离单元都构造一个方位匹配函数,保证方位向的高分辨率不受损失,为海面舰船目标的检测研究提供高分辨SAR图像。

A vehicle-mounted millimeter wave SAR system suitable for near maritime region monitoring is introduced in this paper. The system is flexible and low expensive, which combines the characteristics of millimeter wave and SAR, and is capable of implementing the imaging and surveillance of both static and moving inshore targets. The real SAR data collected from an experiment was used for imaging. Since there are only a few the numbers of range elements in the acceptance range re- quired by the system, an azimuth matching function can be set for each range element to ensure the high azimuth resolution, and to further provide high resolution SAR images for the detection of ship targets on the sea surface.