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Proceedings Paper

A covariance analysis tool for assessing fundamental limits of SIM pointing performance
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Paper Abstract

This paper presents a performance analysis of the instrument pointing control system for NASA's Space Interferometer Mission (SIM). SIM has a complex pointing system that uses a fast steering mirror in combination with a multirate control architecture to blend feedforward information with feedback information. A pointing covariance analysis tool (PCAT) is developed specifically to analyze systems with such complexity. The development of PCAT as a mathematical tool for covariance analysis is outlined in the paper. PCAT is then applied to studying performance of SIM's science pointing system. The analysis reveals and clearly delineates a fundamental limit that exists for SIM pointing performance. The limit is especially stringent for dim star targets. Discussion of the nature of the performance limit is provided, and methods are suggested to potentially improve pointing performance.

Paper Details

Date Published: 14 September 2007
PDF: 12 pages
Proc. SPIE 6675, Optical Modeling and Performance Predictions III, 667508 (14 September 2007); doi: 10.1117/12.735137
Show Author Affiliations
David S. Bayard, Jet Propulsion Lab. (United States)
Bryan H. Kang, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 6675:
Optical Modeling and Performance Predictions III
Mark A. Kahan, Editor(s)

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