A chronology of the on-orbit pointing control system changes on the Hubble Space Telescope and associated pointing improvements

Research on high-precision pointing control based on visual pixel deviation

“…The research on spacecraft pointing control system at home and abroad has also made some progress. Among them, the Hubble Space Telescope launched by NASA earlier achieved a platform pointing accuracy of 90″ and a pointing stability of 0.007″ (24h) [3,4] ; the James-Webb Space Telescope launched in recent years adopted a multi-level control method to achieve The pointing accuracy is better than 6.5″, and the coarse pointing stability is 1″/0.1s [5] ; the domestic "Mozi" quantum satellite pointing system has achieved an accuracy of 0.0004″ [6] . Scholars at home and abroad have focused on how to improve the target Some studies have been carried out on the problem of high precision, high stability and fast pointing control of satellites.…”