舰船尾迹和海面红外仿真成像

舰船在军事领域有着极其重要的地位，其尾迹对海面的温度和高度都会造成相较明显的变化，且具有持续时间长、不易消除等特点，所以模拟舰船尾迹和海面红外辐射图像可以更为直观地识别舰船目标，具有强烈的军事需求。以MODTRAN软件模拟的不同背景环境下大气对8μm～14μm波段的透过率为数据基础，结合Cox-Munk坡度概率分布模型并考虑海浪遮挡因素建立了一种舰船尾迹红外辐射模型，模拟了不同背景环境、不同探测距离的红外尾迹图像。仿真结果表明：相同探测条件下，随着探测距离增大，舰船尾迹辐射亮度减小，但粗糙海面对红外辐射的遮挡作用显著减弱，海面舰船尾迹更易被识别；大气传输模型对红外成像结果影响较大，夏季背景辐射能量大且海面平均遮挡作用小，舰船尾迹红外成像更为清晰。

Infrared simulation imaging of ship wakes and sea surface

Ships have an extremely important position in the military field. Their wakes will cause relatively obvious changes in the temperature and height of the sea surface, and have the characteristics of long duration and difficult to eliminate. Therefore, the simulation of ship wakes and infrared radiation image of the sea surface can identify the ship targets more intuitively, which has a strong military demand. Based on the data of atmospheric transmittance to 8 μm～14 μm band in different background environments simulated by MODTRAN software, a ship wake infrared radiation model was established by combining Cox-Munk slope probability distribution model and considering wave occlusion factors to simulate infrared wake images with different background environments and different detection distances. The simulation results show that under the same detection conditions, although the radiation brightness of the ship wakes decreases with the increase of the detection distance, the ship wakes on the sea surface are more easily identified since the shielding effect of the rough sea surface on the infrared radiation is considerably diminished. The atmospheric transmission model has a great influence on the infrared imaging results. In summer, the background radiation energy is substantial and the average occlusion effect of sea surface is modest, so the infrared imaging of ship wakes is clearer.