作　　者： ; ; ;

机构地区： 中国科学院光电技术研究所

出　　处： 《红外与激光工程》 2011年第11期2085-2090,共6页

摘　　要： 基于红外辐射探测大气层外目标时,探测器接收到的目标红外波段辐射不仅包含目标自身辐射,也包含对环境光源辐射的反射,主要为对太阳辐射、地球辐射、地球反照太阳辐射的反射。在按照基本物理原理进行建模的过程中,通过计算给定探测时间太阳、目标、地球以及观测站点在统一坐标系中位置矢量及其相应夹角,模拟了带太阳能帆板的圆柱主体目标反射的太阳辐射,并使用改进的随机模拟方法计算了地球红外辐射和地球反照经目标反射在探测位置的辐照度。最后,通过分析仿真结果,讨论了选定时间探测到的各辐射光谱辐照度,并给出其总辐照度随轨道位置的变化规律。 When detecting extraatmospheric target based on IR radiation, the infrared radiation received by detector contains not only the target radiation, but also the reflection of environment source radiation, mainly the sun radiation, ＇earth radiation and earth-reflection radiation. The simulation of target signature based on physical principle was performed. By calculating the position vector of sun, target, earth, observation station and the corresponding angles in the same reference frame at the given observation time, the sun radiation reflected by cylindrical target with solar battery plane was simulated. And the radiance of observation place of earth infrared radiation and earth-reflection reflected by target was calculated, using the improved random simulation method. At the end, spectral irradiance received by the detector at the given time was discussed by analyzing the simulation result, and the rule of total irradiance changing with orbit position change was given.

关 键 词： 地球红外辐射 地球反照 位置矢量 均匀模拟 辐照度

领　　域： [电子电信]