到达地球表面的天体红外辐射由地球表面的红外“窗口”形成一个特殊的波段。因为大气层的折射 ,天体红外辐射信号的传播路径为曲线 ,即天文观测中的蒙气差现象。利用天文观测进行舰船定位 ,历来倍受各国重视。由于可见光波段极易受到大气云雾的遮挡 ,无法实现“全天候”天文观测 ,红外天文观测定位便受到关注。对天体的红外观测能确定天体在天球上的位置 ,或通过观测红外天体进行天文定位时 ,须考虑大气对红外波段的折射影响 ,文中提出了观测天体红外信息的蒙气差 ρ的理论计算和修正方法 ,具有一定的实用性 Celestial infrared radiation reaching the Earth’s surface forms a special band from the infrared “window” of the Earth’s surface. Because of the refraction of the atmosphere, the propagation path of the celestial body infrared radiation signal is a curve, that is, the phenomenon of the monstrous difference in the astronomical observation. The use of astronomical observations of ship positioning has always been valued by all countries. Due to the visible light band is extremely vulnerable to atmospheric clouds cover, can not achieve “all-weather” astronomical observations, infrared astronomical observation and positioning will be of concern. Infrared observations of celestial bodies can determine the position of the celestial bodies on the celestial sphere, or when observing the celestial bodies of infrared celestial bodies, the refraction of the infrared wave band must be considered. In this paper, the theoretical calculation and Correction method, has certain practicality