针对飞行器的红外隐身问题, 计算了红外辐射在大气中传输的透过率, 建立了考虑背景辐射的红外隐身性能评估模型, 提出了临界辐射强度的概念, 建立了由临界辐射强度和作用距离关系曲线求解红外系统作用距离的方法。在 3～5.m波段和 8～12.m波段, 计算并分析了温度、相对湿度、大气能见度和海拔高度等大气参数对作用距离的影响。以某型飞行器为例, 分析了红外隐身性能, 给出了红外辐射强度和作用距离的定量关系。

Aiming at the issue of aircraft infrared stealth, transmittance of infrared radiation propagation in atmosphere was calculated, evaluation model of infrared stealth performance was established in consideration of background radiation, the concept of critical radiation intensity was proposed, and the method of solving operating range of infrared system was established through critical radiation intensity and operating range relation curve. In 3-5.m band and 8-12.m band, the influence of atmospheric parameters for operating range was calculated and analyzed, such as temperature, relative humidity, atmosphere visibility and altitude, etc. Infrared stealth performance was evaluated based on certain aircraft, and quantitative relation between infrared radiation intensity and operating range was given.