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空中目标的红外辐射在大气中传输时 ,大气以及大气中的气溶胶会对红外辐射产生吸收和散射 ,从而造成红外辐射的衰减。大气对红外辐射的衰减程度可以用消光系数来描述 ,波长不同 ,消光系数也不同。如果大气气象条件在短时间内变化很小 ,则可认为消光系数在这段时间内没有变化。红外探测系统可以分时探测两个或多个波段的红外辐射 ,通过一定的信号处理手段 ,实现对空中目标的被动定位。文中推导了利用消光系数对空中目标进行定位的公式 ,并进行了计算。
Aerial target infrared radiation is transmitted in the atmosphere, the atmosphere and atmospheric aerosol will absorb and scatter infrared radiation, resulting in attenuation of infrared radiation. Atmospheric attenuation of infrared radiation can be used to describe the extinction coefficient, different wavelengths, extinction coefficient is also different. If the atmospheric conditions in a short period of time changes very little, you can think of extinction coefficient unchanged during this time. Infrared detection system can detect two or more bands of infrared radiation, through a certain signal processing means to achieve the passive positioning of the air target. The paper deduces the formula of using the extinction coefficient to locate the air target and calculates it.