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GRO attitude control and determinationDesign features of the attitude control and determination (ACAD) system for the Gamma Ray Observatory (GRO) that will eventually be launched on the Shuttle are described. A tabulation of the ACAD system components is provided and the various standby and normal pointing operational modes of the system are summarized. The system software and sensors will maintain a quaternion model of the GRO attitude on the bases of kinematic equations and inertial data. The software is standardized and has previously been used on the Solar Maximum Mission and Landsat-D. Details of the processing components, redundant electronics for sensor processing, data handling and actuator control are outlined and illustrated with block diagrams. Tests applied to validate the ACAD design are outlined, as are ground support which will be implemented once the GRO is launched.
Document ID
19870045463
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Jerkovsky, W.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Keranen, L.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Koehler, F.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Tung, F.
(TRW, Inc. TRW Space and Technology Group, Redondo Beach, CA, United States)
Ward, B.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1986
Subject Category
Spacecraft Design, Testing And Performance
Report/Patent Number
AAS PAPER 86-032
Accession Number
87A32737
Distribution Limits
Public
Copyright
Other

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