Research on Improvement of Performance to Detect Small FRP Boats by Marine Radar for Prevention of Marine Disasters

我们研制了一种对舰载雷达接收信号进行A/D转换的雷达回波信号采集系统。利用该系统，分析了小型玻璃钢船在安装雷达反射器和未安装雷达反射器两种情况下的雷达信号强度特性和二维分布，两种情况下的方位角为90 °。和0（度）。主要结果如下。(1)In在无反射面的情况下，艏向RCS小于正横向RCS的一半。(2)By安装反射器后，雷达的RCS比不安装反射器时增加了一倍多。（3）回声漆的大小和形状特征与船体的横倾角无关。（4）有反射体情况下的回波尺寸（方位尺寸和距离尺寸）大于无反射体情况下的回波尺寸。

We have developed a system for sampling the radar echo signals by A/D conversion of the receiving signals from ship-board radar. Using this system, we analyzed characteristics of radar signal intensity and the two-dimensional distribution from a small FRP boat which the radar reflector is installed or not in the situation of two aspect angles, which are 90(deg.) and 0(deg.). The major results are as follows. (1)In the situation with no reflector, the RCS of bow-aspect is less than half that of abeam-aspect. (2)By installing the radar reflector, the RCS increases more than twice as the amount as no reflector. (3)The echo paint characteristics which are size and shape are independent of aspect angle of boat. (4)Echo size (the bearing size and the range size) of the situation with reflector are bigger than that of the situation with no reflector.