摘要
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。
The infrared radiation characteristics of sea surface are important for simulation of infrared ship image, because sea surface is the major background of ship. In order to obtain the infrared radiation of sea surface closed to the actual situation, the sky radiation with different zenith angles, the atmospheric transmittance and path radiation with different altitudes and pitch angles were calculated by use of the MODTRAN. The reflections of the solar and sky radiation from the sea surface were calculated according to the law of reflection. The infrared radiation of sea surface possibly viewed by detector was calculated with the improved sea surface radiation model. The radiation of the bands 3-5 μm and 8-12 μm were simulated with and without the solar specular reflection. The results show that the simulation of the infrared radiation of sea surface in the use of the improved sea surface radiation models is closer to the reality.
出处
《红外与激光工程》
EI
CSCD
北大核心
2009年第1期19-22,共4页
Infrared and Laser Engineering
关键词
红外辐射
天空辐射
太阳辐射
MODTRAN
Electromagnetic waves
Infrared radiation
Radiometers
Reflection
Ships
Simulators
