空中目标红外辐射多波长大气透过率实时反演算法
Real-time inversion algorithm of multi-wavelength atmospheric transmissivity for aerial target infrared radiation
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摘要: 针对空中目标红外辐射大气传输衰减的主导因素，通过Mie散射理论分析和计算得到了不同波长红外大气透过率之间的相关性关系。采用自主研发的激光遥感大气透过率测量仪并利用激光大气透过率多点断层测量技术，实测了1 060 nm波长激光的大气透过率，同步实时反演计算了临近波长红外辐射的大气透过率。实验数据验证了该方法可用于建立红外观测低空修正系统，实时计算获取大气对空间目标红外辐射的衰减特性。Abstract: The correlativity between atmospheric transmissivity and laser wavelength was gained by using Mie scattering theory and dominant factors for attenuation of aerial target infrared radiation propagating in atmosphere.With a laboratory apparatus designed by ourselves and laser multipoint fault measuring techniques, we measured atmospheric transmissivity at 1 060 nm wavelength, then inversely calculated transmissivities at 532, 860 and 1 570 nm in real time using the correlativity between wavelength and atmospheric transmissivity. The results indicate that it is feasible to use the correlativity to inverse infrared atmospheric propagation and establish the infrared radiation real time atmospheric propagation correcting model and system platform of aerial target．
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