机载星敏感器成像的仿真技术研究

Simulation Technology of Airborne Star Sensor Imaging

根据天文导航的基本原理,综合考虑了星敏感器自身噪声、星云星团、大气折射、大气扰动和气动、地球遮挡等因素对机载星敏感器成像的影响,实现了复杂环境下的星光在机载CCD星敏感器上的成像仿真。在仿真过程中,重点考虑了大气折射的影响,分析了载体在大气层内飞行时星光角距、载体姿态和折射角之间的关系,推导了星敏感器成像点位置偏移的计算公式,为进一步研究机载天文导航技术打下了基础。

Considering the noise of star sensor, nebula cluster, atmospheric refraction, atmospheric disturbances and the earth covering and so on, the star simulation of airborne star sensor on the complicated environment is realized according to the basic principle of celestial navigation. Priority to the atmospheric refraction, relationship among the starlight angle, carrier atti-tude and refraction angle are analyzed and computing of offset of the image position in the atmo-sphere is derived, laying a foundation for the further study.