Future commercial and military spacecraft are expected to achieve new levels of autonomy and pointing precision, thanks to improved on-board computing speed and memory capacity. These on-board capabilities are critical for the difficult tasks of envisioned future space missions, such as extremely large base interferometry, space optical telescope deployment, formation flying, and autonomous spacecraft docking and maintenance. Numerous spacecraft control systems have been developed in recent years to handle the difficult attitude tracking, stability, and disturbance rejection needs of these missions.
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