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Proceedings Paper

Initial performance of the attitude control and aspect determination subsystems on the Chandra Observatory
Author(s): Robert A. Cameron; Thomas L. Aldcroft; William A. Podgorski; Mark D. Freeman; Jeffrey J. Shirer
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Paper Abstract

The pointing control and aspect determination subsystem of the Chandra X-ray Observatory plays a key role in realizing the full potential of Chandra's X-ray optics and detectors. We review the performance of the spacecraft hardware components and sub-systems, which provide information for both real time control of the attitude and attitude stability of the Chandra Observatory and also for more accurate post-facto attitude reconstruction. These flight components are comprised of the aspect camera (star tracker) and inertial reference units (gyros), plus the fiducial lights and fiducial transfer optics which provide an alignment null reference system for the science instruments and X-ray optics, together with associated thermal and structural components. Key performance measures will be presented for aspect camera focal plane data, gyro performance both during stable pointing and during maneuvers, alignment stability and mechanism repeatability.

Paper Details

Date Published: 18 July 2000
PDF: 11 pages
Proc. SPIE 4012, X-Ray Optics, Instruments, and Missions III, (18 July 2000); doi: 10.1117/12.391605
Show Author Affiliations
Robert A. Cameron, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Thomas L. Aldcroft, Harvard-Smithsonian Ctr. for Astrophysics (United States)
William A. Podgorski, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Mark D. Freeman, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Jeffrey J. Shirer, TRW Space & Electronics Group (United States)

Published in SPIE Proceedings Vol. 4012:
X-Ray Optics, Instruments, and Missions III
Joachim E. Truemper; Bernd Aschenbach, Editor(s)

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