【摘 要】
：
在海上使用的超低空雷达设计中,非常有必要了解不同海情下的海面激光散射特性。针对设计需求,在实验室内通过人工造波模拟海况,解决了实际海环境测试的困难,实现海面激光散射
【机 构】
：
同济大学物理科学与工程学院先进微结构材料教育部重点实验室,同济大学精密光学工程技术研究所,电磁散射国家重点实验室,
论文部分内容阅读
在海上使用的超低空雷达设计中,非常有必要了解不同海情下的海面激光散射特性。针对设计需求,在实验室内通过人工造波模拟海况,解决了实际海环境测试的困难,实现海面激光散射影响因素的定量控制。通过激光散射测试系统,获取各种状态和不同波束照射角情况下的近场激光散射数据,经过统计分析给出了规则正弦波海面和不规则(P-M谱)海面的激光散射特性。海面激光散射与漫反射板散射差异较大,海面散射以表面镜像散射分量为主。激光散射回波起伏随海表面波形空间波长而变化;散射回波大小随擦地角增大而增大;在固定的擦地角时,海情越高相应散射回波越强;当擦地角足够大时,散射回波大小随海情变化不大。
In the design of ultra-low-altitude radars used at sea, it is necessary to understand the laser scattering characteristics of the sea under different sea conditions. According to the design requirements, artificial sea wave is simulated in the laboratory to solve the problem of actual sea environment testing, and the quantitative control of the influencing factors of laser scattering on the sea surface is realized. Near-field laser scattering data under various conditions and different beam irradiation angles were obtained by a laser scattering test system. The laser scattering characteristics of regular S-wave sea surface and irregular (P-M spectrum) sea surface were given through statistical analysis. Sea surface laser scattering and diffuse scattering are different greatly, and surface scattering is dominated by surface scattering. The fluctuation of laser scattering echoes varies with the spatial wavelength of the sea surface waveform. The size of the scattering echoes increases with the erasing angle. At the fixed erasing angle, the higher the sea conditions, the stronger the corresponding scattering echoes. When the angle is large enough, the size of the scattering echo varies little with the sea conditions.
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