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作为海面目标的主要背景,海面的红外辐射特性对于舰船红外仿真研究具有重要意义。为了获得更接近实际的海面红外辐射,用MODTRAN按照不同的天顶角计算出天空辐射,按照不同的高度和俯仰角计算出透过率以及大气程辐射。根据反射定律计算出海面反射的太阳辐射以及天空辐射。用改进的海面辐射模型计算探测器可见海面的红外辐射。在有太阳镜面反射和无太阳镜面反射两种情况下,对3～5μm和8～12μm波段的海面红外辐射分别进行模拟。结果表明,利用改进的海面辐射模型对海面红外辐射进行模拟更加接近实际。
As the main background of sea targets, the infrared radiation characteristics of sea surface is of great significance for the research of infrared simulation of ships. In order to obtain a closer to the actual infrared radiation from the sea, using MODTRAN according to different zenith angle calculated sky radiation, according to the different height and pitch angle calculated transmittance and atmospheric radiation. According to the law of reflection, the solar radiation reflected by the sea surface and the radiation of the sky are calculated. Calculation of Infrared Radiation of Visible Sea Surface by Detector with Improved Model of Sea Surface Radiation. In the case of a sun-reflecting mirror and a non-sun-reflecting mirror, the sea surface infrared radiation of 3 ~ 5μm and 8 ~ 12μm were simulated respectively. The results show that using the improved sea surface radiation model to simulate sea surface infrared radiation is more realistic.