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Autonomous star referenced attitude determinationA general star pattern recognition algorithm has been used to develop JPL's redundant, microcomputer-equipped ASTROS II CCD star tracker into a full-sky autonomous star tracker (FAST), capable of determining its attitude about all three axes without requiring any a priori attitude knowledge. A large field of view allows the number of guide stars in the all-sky data-base of the tracker to be limited to a manageable number, while high accuracy ensures that the pattern formed by the observed guide stars is unique. The recognition algorithm can also be used for automating the acquisition of celestial targets by astronomy telescopes, for autonomously updating the attitude of gyro-based attitude control systems, and for automating ground-based attitude recognition. Using both Monte Carlo simulations and a quasi-analytical method, it is shown that the general recognition algorithm and a less software-intensive special algorithm can be used to reliably automate the acquisition of celestial targets by astronomy telescopes.
Document ID
19900034474
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Van Bezooijen, R. W. H.
(JPL Pasadena, CA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Subject Category
Spacecraft Instrumentation
Report/Patent Number
AAS PAPER 89-003
Meeting Information
Meeting: Annual Rocky Mountain Guidance and Control Conference
Location: Keystone, CO
Country: United States
Start Date: February 4, 1989
End Date: February 8, 1989
Sponsors: AAS
Accession Number
90A21529
Funding Number(s)
CONTRACT_GRANT: NCC2-29
CONTRACT_GRANT: NCA2-IR-745-407
Distribution Limits
Public
Copyright
Other

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