NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Initial Performance of the Attitude Control and Aspect Determination Subsystems on the Chandra ObservatoryThe aspect determination system 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.
Document ID
20000036513
Document Type
Preprint (Draft being sent to journal)
Authors
Cameron, R. (Smithsonian Astrophysical Observatory Cambridge, MA United States)
Aldcroft, T. (Smithsonian Astrophysical Observatory Cambridge, MA United States)
Podgorski, W. A. (Smithsonian Astrophysical Observatory Cambridge, MA United States)
Freeman, M. D. (Smithsonian Astrophysical Observatory Cambridge, MA United States)
Date Acquired
September 8, 2013
Publication Date
January 1, 2000
Subject Category
Astronomy
Meeting Information
Astronomical Telescopes and Instrumentation(Munich)
Funding Number(s)
CONTRACT_GRANT: NAS8-39073
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.