天基导弹预警紫外波段尾焰信号与大气背景分析

Analysis of Plume of Space-Based Missile Precaution System at Ultraviolet Band and Atmosphere Background

利用氧化铝粒子模型计算了导弹尾焰在200～400 nm波段光谱辐亮度,通过Modtran软件计算了大气垂直方向紫外信号的透射率及不同条件下的大气紫外波段背景亮度,通过对不同高度上导弹尾焰紫外信号与大气背景亮度比较,得到当导弹目标高度超过40 km后,240～300 nm波段的比值较高,理论上可用来在日光照射模式下,进行目标探测与识别。

The spectral radiance of missile plume is calculated with the alumina particles model at ultraviolet band. The transmittance at vertical direction and the background of atmosphere are obtained by Modtran software. The analysis of missile plume and atmosphere background shows that when the missile height is over 40 km, the ratio of the missile plume and atmosphere background is high at the range of 240 nm to 300 nm. Theoretically, this research can be used to detect and identify missile plume signal in the sunbeam mode.