A Three-Axis Angular Monitoring System For The Magnetic Field Satellite (MAGSAT) Mission

P. Wardham Collyer; Frederick W. Schenkel

doi:10.1117/12.959468

31 December 1980 A Three-Axis Angular Monitoring System For The Magnetic Field Satellite (MAGSAT) Mission

P. Wardham Collyer, Frederick W. Schenkel

Proceedings Volume 0251, Optical Alignment I; (1980) https://doi.org/10.1117/12.959468
Event: 24th Annual Technical Symposium, 1980, San Diego, United States

Abstract

An electro-optical attitude transfer system was developed to monitor the angular orientation of magnetometers deployed at the end of a 20-foot boom extending outboard from the Magsat spacecraft. One autocollimator monitors pitch and yaw attitude, cooperating with a plane mirror at the end of the boom; a second monitors roll (twist) from an offset look-angle, using one dihedral reflector at the boom end and a second on the spacecraft. RMS errors due to all causes including linearity, 0-forces, cross-coupling and translation are estimated to be 3.9 arc-seconds over ±180 arc-sec. excursion in pitch and yaw, and 5.3 to 7.5 arcseconds over ±300 arc-sec roll. Design and fabrication problems relative to the remote dihedral reflector proved to be the most challenging, and solutions to these problems will be described.

Citation Download Citation

P. Wardham Collyer and Frederick W. Schenkel "A Three-Axis Angular Monitoring System For The Magnetic Field Satellite (MAGSAT) Mission", Proc. SPIE 0251, Optical Alignment I, (31 December 1980); https://doi.org/10.1117/12.959468

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