不同条件下海面热尾流红外辐射特性研究

Study on infrared radiation characteristics of sea surface thermal wake under various conditions

中文关键词: 热尾流  红外辐射  红外探测

英文关键词: thermal wake  infrared radiation  infrared detection

中文摘要:

      综合考虑波动海面的遮挡和周围环境对热尾流辐射亮度的影响，建立了热尾流红外辐射模型。通过计算3~5μm和8~12μm两个大气窗口下探测器接收到的热尾流红外辐射亮度，得到了热尾流红外辐射特性与风速、探测器高低角和尾流温度之间的关系。从红外探测的角度，利用辐射对比度参量研究了热尾流目标与海洋背景在探测器处的差别，得到了热尾流与海洋背景的对比度在风速和探测器天顶角变化时的变化规律。研究结果为海面热尾流的红外探测提供了理论参考。

英文摘要:

      A thermal wake infrared radiance model is established, considering the shelter from fluctuating sea surface and the effects from environment to thermal wake radiance. Through calculating the thermal wake infrared radiation that are received by detector respectively under 3-5μm and 8-12μm atmospheric windows, the results indicates the relationship among thermal wake infrared radiation, wind velocity and the angle of detector, and the temperature of thermal wake. From the aspect of infrared detection, the radiation contrast between the target of the thermal wake and the marine background is studied.The change rule of the contrast between thermal wake and marine background is got when wind velocity and the angle of detector have constant variation. The simulation result provides a theoretical reference for infrared detection on sea thermal wake.