Galileo Spacecraft Scan Platform Celestial Pointing Cone Control Gain Redesign
During September and October 1991, pictures of the Gaspra asteroid and neighboring stars were taken by the Galileo Optical Navigation (OPNAV) Team for the purpose of navigation the spacecraft for a successful Gaspra encounter. The star tracks in these pictures showed that the scan platform celestial pointing cone controller performed poorly in compensating for wobble-induced cone offsets.
Gaspar asteroid Galileo Optical Navigation (OPNAV)↗