航天器工程2019，Vol.28Issue(2)：36-42,7.DOI:10.3969/j.issn.1673G8748.2019.02.006
星相机高精度校时计时方法
High Precision Time Correction and Calculation Method of Star Camera
摘要
Abstract
A high precision time correction and calculation method is designed.The star camera adj usts its own equipment clock to make it strictly align with the satellite time scale.The alignG ment error is recorded accurately,and the precision of synchronization signal with satellite is betG ter than 1μs,which solves the problem of large system error existing in the traditional time synG chronization method which only records the time but does not adj ust the time.The method proG posed is verified by analysis and measurement of time synchronization error,and the results show that the maximum time synchronization error is 880 ns.Thus,the high precision time synchroniG zation between the two star cameras and the satellite platform is guaranteed,which has great application value for improving the precision of surveying and mapping.关键词
星相机/控制同步器/高精度校时计时/本地时钟同步校正Key words
star camera/control synchronizer/high precision time correction and calculation/local clock synchronization correction分类
航空航天引用本文复制引用
宗云花,于艳波,邸晶晶,任宇宁,刘晓鹏,王伟之..星相机高精度校时计时方法[J].航天器工程,2019,28(2):36-42,7.基金项目
国家重点研发计划地球观测与导航重点专项(2016YFB0500802) （2016YFB0500802）
