Li Wenhao, Liu Zhaohui, Mu You, Yang Rui, Zhang Xing
Appl Opt. 2017 Mar 20;56(9):2428-2433. doi: 10.1364/AO.56.002428.
When a spacecraft is in orbit, it is almost impossible to check its working condition. Almost all payload would generate waste heat when working, which is usually ejected by a radiator. By observing the radiator, we can catch a glimpse of a spacecraft's inner information. A thorough model of a space-based infrared detection system is analyzed, taking the radiator into account, which, to the best of our knowledge, has seldom been considered. The calculation result shows that infrared radiation reflected by spacecraft is weak compared with the spacecraft's self-radiation in 8-12 μm, and the contrast ratio between the radiator and surrounding area could be the criterion for judging the working condition of a spacecraft. The limit of detection distance is also increased due the higher temperature of the radiator.
当航天器在轨道上时，几乎不可能检查其工作状态。几乎所有有效载荷在工作时都会产生废热，这些废热通常由散热器排出。通过观察散热器，我们可以一窥航天器的内部信息。本文分析了一个考虑了散热器的天基红外探测系统的完整模型，据我们所知，散热器很少被考虑在内。计算结果表明，在8 - 12μm波段，航天器反射的红外辐射与航天器自身辐射相比很弱，散热器与周围区域的对比度可作为判断航天器工作状态的标准。由于散热器温度较高，探测距离的极限也会增加。
