红外辐射在进入导引头探测视场之前经过大气传输的消光作用，尽管在大气透过率较高的 3～5 .m以及 8～12 .m，大气传输带来的影响仍旧不能忽视，本文综合试验经验，确定影响传输的主要因素，结合 MODTRAN软件，对于主要影响参数的影响作用进行分析评估，建立关系曲线，分析不同参数对红外辐射大气传输影响的变化规律，为后续导引头极限条件下使用和性能参数研究打下基础。

The extinction effect of the atmosphere on infrared radiation has been often experienced with sensors, and this effect cannot be ignored even for high transmissivity waves that have wavelengths of the order 3–5 .m and 8–12 .m. This study investigates the main factors affecting development of testing methods and uses MODTRAN analysis to decipher the influence of the main factors; the variation trends of atmospheric transmission on infrared radiation are obtained, and the study lays a good foundation for the research in this field.