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Proceedings Paper

Experience of integrated interferometric guidance and astrometry
Author(s): Darrell B. Story; Edmund P. Nelan; G. Fritz Benedict; William H. Jefferys; Arthur J. Bradley; Linda Abramowicz-Reed
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Paper Abstract

The three fine guidance sensors on-board the Hubble Space Telescope are the first white-light amplitude shearing interferometers to be used for space platform guidance, control, and astrometry. Two fine guidance sensors (FGS) under fine lock control now maintain spacecraft pointing precision to within 7 milliseconds of arc rms over the majority of each orbit. Fine guidance sensor control optimization techniques have yielded significant improvement in tracking stability, integrated performance with the pointing control system, loss-of-lock statistics and astrometric accuracy. We describe the optical interferometer, based on the Koester's prism design. We include a discussion of the instrument calibration status, the FGS fine lock performance design enhancements, pointing control system design enhancements, and ground software techniques appropriate to jitter removal in astrometric data. The combination results in marc sec precision astrometry.

Paper Details

Date Published: 5 July 1994
PDF: 12 pages
Proc. SPIE 2221, Acquisition, Tracking, and Pointing VIII, (5 July 1994); doi: 10.1117/12.178961
Show Author Affiliations
Darrell B. Story, Univ. of Texas McDonald Observatory (United States)
Edmund P. Nelan, Univ. of Texas McDonald Observatory (United States)
G. Fritz Benedict, Univ. of Texas McDonald Observatory (United States)
William H. Jefferys, Univ. of Texas McDonald Observatory (United States)
Arthur J. Bradley, AlliedSignal Aerospace Co. (United States)
Linda Abramowicz-Reed, Hughes Danbury Optical Systems, Inc. (United States)


Published in SPIE Proceedings Vol. 2221:
Acquisition, Tracking, and Pointing VIII
Michael K. Masten; Larry A. Stockum; Morris M. Birnbaum; George E. Sevaston, Editor(s)

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