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Configuration trade-offs for the Space Infrared Telescope Facility pointing control systemConceptual pointing control system designs for the Space Infrared Telescope Facility (SIRTF) are examined in terms of fine guidance pointing and large-angle slewing accuracies. In particular, basic trade-offs between body pointing only and body pointing plus image motion compensation (IMC) are considered using a steady-state linear covariance analysis to compute rms pointing errors. It is shown that body pointing can provide good performance during nominal fine pointing but limits the telescope capability to rapidly slew and acquire targets. Overall, body pointing plus IMC would offer superior performance but must be judged against the difficulties posed by the attitude sensor noise and the higher cost and complexity of IMC. It is recommended that improved sensor designs be pursued while slewing performance be enhanced by a combination of an appropriate command profile and control compensation.
Document ID
19850063734
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Pue, A. J.
(Johns Hopkins Univ. Laurel, MD, United States)
Strohbehn, K.
(Johns Hopkins Univ. Laurel, MD, United States)
Hunt, J. W.
(Johns Hopkins University Laurel, MD, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1985
Subject Category
Spacecraft Instrumentation
Report/Patent Number
AIAA PAPER 85-1856
Meeting Information
Meeting: Guidance, Navigation and Control Conference
Location: Snowmass, CO
Start Date: August 19, 1985
End Date: August 21, 1985
Accession Number
85A45885
Distribution Limits
Public
Copyright
Other

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