Physics – Optics
Scientific paper
Sep 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1111..344r&link_type=abstract
IN: Acquisition, tracking, and pointing III; Proceedings of the Meeting, Orlando, FL, Mar. 27-29, 1989 (A90-39001 17-17). Bellin
Physics
Optics
Control Systems Design, Light Beams, Line Of Sight, Optical Tracking, Pointing Control Systems, Spacecraft Tracking, Gimbals, Mirrors, Optical Paths, Spaceborne Telescopes
Scientific paper
The line of sight for optical beams from a spacecraft for pointing and tracking can be controlled in several ways. The whole optical system can be pointed to the object of interest, such as for the Hubble Space Telescope. The optical elements, such as a telescope, can be gimbal mounted and maneuvered with respect to an independently controlled spacecraft base, such as the European Space Agency Instrument Support Assembly. A third method maneuvers mirrors so as to direct the line of sight througy spacecraft mounted telescope optics. This paper addresses the last alternative. Extended response agility can be accommodated with multiple mirrors. The field of view can be established with a relatively slow gimbal mounted mirror with a considerable angular range to be augmented in the optical path with a relatively fast response angular mirror with a limited angular range. The use of the error signal from the slow mirror to command the fast mirror extends the effective bandwidth of the system.
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