应用于天文导航的白昼恒星探测技术

摘要

A technical analysis of daytime star detection is given,which is applied to celestial navigation.Firstly,based on the analysis of atmospheric transmittance and correlated sky background scattering as well as the spectral distribution,the detection band from 900 ～ 1700nm is ascertained.Secondly,the relationships between the single field of view (FOV) with a stationary optical axis and detection sensitivity and daytime star capture probability are calculated.Finally,the program-related details for the daytime star detection,the detector selection,integral time,the design of catalogue of stars and multi-frame algorithm strategy are given.The experiment results accord with the analysis.%对白昼恒星探测技术的方案进行研究,通过分析大气透过率以及散射光和恒星的光谱分布,选定900～1 700 nm探测波段.根据星表及探测器噪声的实测结果,计算得出基于光轴固定的单一视场与探测灵敏度、捕获概率的关系,并提出适应白昼观星的探测器选型、积分时间、星表设计以及多帧算法策略.观星试验结果与理论计算一致.