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Proceedings Paper

GEO light imaging national testbed (GLINT) heliostat design and testing status
Author(s): Marcia Ann Thornton; Jerry R. Oldenettel; Dane William Hult; Katrina Koski; Tracy Depue; Edward Louis Cuellar; Jim Balfour; Morey Roof; Fred W. Yarger; Greg Newlin; Lee Ramzel; Peter Buchanan; Fesseha G. Mariam; Lee Scotese
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Paper Abstract

The GEO Light Imaging National Testbed (GLINT) will use three laser beams producing simultaneous interference fringes to illuminate satellites in geosynchronous earth orbit (GEO). The reflected returns will be recorded using a large 4,000 m2 'light bucket' receiver. This imaging methodology is termed Fourier Telescopy. A major component of the 'light bucket' will be an array of 40 - 80 heliostats. Each heliostat will have a mirrored surface area of 100 m2 mounted on a rigid truss structure which is supported by an A-frame. The truss structure attaches to the torque tube elevation drive and the A-frame structure rests on an azimuth ring that could provide nearly full coverage of the sky. The heliostat is designed to operate in 15 mph winds with jitter of less than 500 microradians peak-to- peak. One objective of the design was to minimize receiver cost to the maximum extent possible while maintaining GLINT system performance specifications. The mechanical structure weights approximately seven tons and is a simple fabricated steel framework. A prototype heliostat has been assembled at Stallion Range Center, White Sands Missile Range, New Mexico and is being tested under a variety of weather and operational conditions. The preliminary results of that testing will be presented as well as some finite element model analyses that were performed to predict the performance of the structure.

Paper Details

Date Published: 22 January 2002
PDF: 11 pages
Proc. SPIE 4489, Free-Space Laser Communication and Laser Imaging, (22 January 2002);
Show Author Affiliations
Marcia Ann Thornton, Trex Enterprises (United States)
Jerry R. Oldenettel, Trex Enterprises (United States)
Dane William Hult, Trex Enterprises (United States)
Katrina Koski, Trex Enterprises (United States)
Tracy Depue, Trex Enterprises (United States)
Edward Louis Cuellar, Trex Enterprises (United States)
Jim Balfour, Trex Enterprises (United States)
Morey Roof, Trex Enterprises (United States)
Fred W. Yarger, Trex Enterprises (United States)
Greg Newlin, Trex Enterprises (United States)
Lee Ramzel, Trex Enterprises (United States)
Peter Buchanan, Trex Enterprises (United States)
Fesseha G. Mariam, Trex Enterprises (United States)
Lee Scotese, HCR 79 (United States)

Published in SPIE Proceedings Vol. 4489:
Free-Space Laser Communication and Laser Imaging
David G. Voelz; Jennifer C. Ricklin, Editor(s)

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