空间目标温度与红外特性影响因素研究  

Influencing factors of temperature and infrared characteristics of space target

作　　者：李享 李劲东[1] 孙鹤枝 杨乐 LI Xiang;LI Jin-dong;SUN He-zhi;YANG Le(Beijing Institute of Spacecraft System Engineering,Beijing 100094,China)

机构地区：[1]北京空间飞行器总体设计部

出　　处：《激光与红外》2019年第12期1436-1441,共6页Laser & Infrared

摘　　要：为了计算空间目标的温度和红外辐射特性,需要掌握空间轨道外热流在目标表面的分布与变化规律,通过分析空间目标在轨道上的内外能量交换关系,采用数值计算的方法,对某锥形空间目标进行了温度与红外仿真,定量分析了多种参数对计算结果的影响规律。结果表明:阳光和轨道面的夹角β角对目标表面温度和红外变化规律影响显著,并且在β较大时,计算结果对于β的变化更敏感;考虑地球反照率随纬度变化后的温度和8~14μm的红外辐射强度分别降低了1.73℃、0.27 W/sr,在精确计算空间目标特性时不能忽略反照率的影响。In order to calculate the temperature and infrared radiation characteristics of space target,it is necessary to master the distribution and variation regularity of the orbit external thermal flux on target.Analyzing the energy exchange relationship between the inside and outside of the space target in orbit,the numerical simulation method was used to simulate the temperature and infrared of a cone-shaped space target,and the influence of various parameters on the calculation results was quantitatively analyzed.The results show that the angleβbetween sunlight and orbital plane has a significant effect on the temperature and infrared variation of space target;the calculation results are more sensitive to the change ofβwhenβis larger.Considering the change of the earth albedo with latitude,the temperature and the infrared radiation intensity of 8~14μm reduced by 1.73℃and 0.27 W/sr respectively.The variation of albedo cannot be ignored when calculating the characteristics of space target accurately.

关 键 词：空间目标 轨道外热流 β角 地球反照率 

分 类 号：TN215[电子电信—物理电子学]