摘要
为了提高导航卫星平台时间的精度以作为卫星时间的备用基准,采用了软硬件相结合的平台时间管理技术。针对星载计算机自守时偏差,提出了一种以载荷系统时间为基准,软件可在轨自主标定、自主校正的时间精度维持方法,实现卫星平台时间比传统星载计算机自守时时间精度提高3个数量级。通过对地面试验数据及卫星在轨运行的分析验证了该方法的有效性。
In order to improve the precision of navigation satellite platform time as the backup reference of satellite time, the platform time management technologies combining software with hardware are adopted. Aiming at the time error of on-board computer, a time precision maintenance method based on the load system time is proposed, which can be calibrated and corrected independently by software on orbit and can improve the time precision of on-board computer by three orders of magnitude. The effectiveness of the method is verified by the analysis of ground test data and satellite operation in orbit.
作者
石龙龙
祁见忠
贺芸
Shi Longlong;Qi Jianzhong;He Yun(Institute of Microsatellite Innovation,Chinese Academy of Sciences,Shanghai 201203,China;Shanghai Engineering Center for Microsatellites,Shanghai 201203,China)
出处
《航天控制》
CSCD
北大核心
2022年第1期70-75,共6页
Aerospace Control
关键词
导航卫星
平台时间
时间精度
自主标定
Navigation satellite
Platform time
Time accuracy
Automatic Calibration
Automatic correction
