多光谱星敏感器的辐射定标与光谱反演

Radiometric Calibration and Spectral Inversion of Multi-Spectral Star Sensors

为实现星敏感器对未知空间光环境的测量,提出一种将宽谱段多光谱滤光片装置于星敏感器中的设计,所采集的星图可覆盖星点信息与空间光环境光谱信息,并以此为基础设计了光谱响应定标、辐射定标的实验方案与空间光环境辐亮度分布反演算法。实验结果表明,反演的光环境辐亮度与实测值较为符合,该方法能根据单张星图实时便捷地估算星敏感器应用空间的光环境,可为后续星敏感器的设计优化和观星窗口的选择提供依据。

In order to achieve the measurement of unknown space optical environments for star sensors,the design of a wide and multi-spectral filter device integrated into the star sensor is proposed in this paper.The star point information and the spectral information of the space optical environment can be covered by the collected star images.On the basis of this process,experiments scheme of spectral response and radiation calibration and algorithm of brightness distribution inversion of the optical environment are conducted.The experimental results show that the inverted brightness of the optical environment is in good agreement with the measured values.The space optical environment for star sensor applications in real time can be estimated by applying this method conveniently based on a single star image.It can be served as a basis and reference for design optimization of subsequent star sensors and selection of observation windows.