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Graphical techniques to assist in pointing and control studies of orbiting spacecraftComputer generated graphics are developed to assist in the modeling and assessment of pointing and control systems of orbiting spacecraft. Three-dimensional diagrams are constructed of the Earth and of geometrical models which resemble the spacecraft of interest. Orbital positioning of the spacecraft model relative to the Earth and the orbital ground track are then displayed. A star data base is also available which may be used for telescope pointing and star tracker field-of-views to visually assist in spacecraft pointing and control studies. A geometrical model of the Hubble Space Telescope (HST) is constructed and placed in Earth orbit to demonstrate the use of these programs. Simulated star patterns are then displayed corresponding to the primary mirror's FOV and the telescope's star trackers for various telescope orientations with respect to the celestial sphere.
Document ID
Document Type
Technical Publication (TP)
Howell, L. W.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Ruf, J. H.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
September 5, 2013
Publication Date
March 1, 1986
Subject Category
Astronautics (General)
Report/Patent Number
NAS 1.60:2575
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
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