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Proceedings Paper

HST guide star acquisition logic modification for two-gyro science
Author(s): Larry Dunham; Art Bradley; Michael Wenz; Brian Vreeland; M. Prior
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Paper Abstract

It has been approximately 6.4 years since the Gyroscopes on HST have been replaced. During this time two Gyroscopes have failed and two have developed problems, but operational work-arounds are available. Further Gyroscope replacement will not occur until the anticipated Shuttle Servicing Mission scheduled for November, 2007. To extend the science mission life of HST up to an additional 15 months, the control system has been modified from a three/four-Gyro, to a two-Gyro control law. This paper describes the new two-Gyro Guide Star acquisition strategy to enable science observations, including the integration of Astrometry commanding with the Acquisition Logic.

Paper Details

Date Published: 30 June 2006
PDF: 8 pages
Proc. SPIE 6270, Observatory Operations: Strategies, Processes, and Systems, 62701M (30 June 2006); doi: 10.1117/12.669078
Show Author Affiliations
Larry Dunham, Vantage Systems, Inc. (United States)
Art Bradley, Spacecraft System Engineering Services (United States)
Michael Wenz, Lockheed Martin Technical Operations (United States)
Brian Vreeland, Space Systems Integration (United States)
M. Prior, NASA/Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 6270:
Observatory Operations: Strategies, Processes, and Systems
David R. Silva; Rodger E. Doxsey, Editor(s)

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