卫星双波段红外热像仿真

The Infrared Imaging Simulations of a Satellite in Two IR bands

建立了完善的卫星温度场与红外特性的理论计算模型,并对卫星3～6μm和6～16μm波段的红外热像进行了可视化仿真。首先根据卫星、地球和太阳的位置关系,计算了卫星接收的空间热流;然后利用有限元法求解瞬态热平衡方程得到了卫星的表面温度分布;最后在3～6μm和6～16μm波段分别计算了卫星的红外辐射出射度并对卫星的红外热像进行了可视化仿真。研究结果对于空间目标的红外探测与识别具有参考价值。

he perfect theoretical calculation models of the satellite＇s temperature field and infrared feature are established. The infrared imaging simulations of the satellite in 3～6μm and 6～16μm are realized. First, the space heat flux that the satellite gets is calculated according to the space locations of the satellite, the earth and the sun. Second, the surface temperature distribution of the satellite is got by solving the transient heat balance equations with the use of the finite element method （FEM）. Third, on the basis of the solved surface temperature distribution, the infrared radiant emittance in two IR bands is calculated and infrared imaging simulations are realized. The research results of this paper have referential value on infrared detecting and recognition of spatial targets.