弹载星敏感器太空光环境研究

分析弹载星敏感器对星空成像时的太空光环境.运用普朗克黑体辐射定律,估算杂散光(太阳光、月亮光、地气光)在星敏感器工作高度处的辐照度;计算任意时刻星敏感器光轴与杂散光之间的夹角;综合考虑遮光罩的抑制杂散光作用,建立弹载星敏感器太空光环境的实时模型.仿真结果表明,星敏感器光轴与杂散光之间的夹角与实际情况吻合,该模型能够方便实时地估算弹载星敏感器的太空光环境,可为确定星敏感器的选星策略和导弹发射窗口提供依据.

Research on Space Luminous Environment of Missile-Borne Star Sensor

This research analyzes the space luminous environment when missile-borne star sensor is used to image the starry sky. Irradiancies of strays (sunlight, moonlight, earth and atmosphere radiation) at star sensor working height were estimated based on Planck blackbody radiation law. Included angles between the star sensor optical axis and strays at any moment were calculated utilizing the relative astronomy and mathematics knowledge. Considering the effect of strays suppressed by sensor baffle, a real-time model for space luminous environment of missile-borne star sensor was established. The simulation results show that included angles between the star sensor optical axis and strays are identical with the actual situation. The proposed model could conveniently estimate the space luminous environment of missile-borne star sensor in real-time, which would provide a basis of star-chosen strategy and missile launch window.