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Proceedings Paper

Photogrammetric surveys of the mirror support cell of the Keck Optical Telescope
Author(s): Peter C. Gustafson
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Paper Abstract

The W. M. Keck Observatory will house the largest optical telescope ever constructed. A multi-segmented, 10 m diameter mirror will allow the telescope to look into space over a distance four times further than any other current system. The support cell for the mirror segments was manufactured in Spain, partially dismantled for shipment and then re-assembled and installed on the mountain of Mauna Kea in Hawaii. Photogramme.tric surveys of the structure were made both in Spain and Hawaii. Measurements in Spain served as acceptance criteria for the structure in addition to detailing as-built conditions. Loaded deformation was also tested in Spain to confirm conformance to design. The measurements in Hawaii checked for effects of shipment and also proper installation in a very different physical environment. All surveys yielded similar precision of 0.03mm RMS one sigma (1 part in 300,000 of the object diameter). This paper describes the major phases of the project, details specific design and operational characteristics of the surveys and presents the results obtained.

Paper Details

Date Published: 1 August 1990
PDF: 8 pages
Proc. SPIE 1395, Close-Range Photogrammetry Meets Machine Vision, 13951H (1 August 1990); doi: 10.1117/12.2294296
Show Author Affiliations
Peter C. Gustafson, Geodetic Services, Inc. (United States)


Published in SPIE Proceedings Vol. 1395:
Close-Range Photogrammetry Meets Machine Vision
Armin Gruen; Emmanuel P. Baltsavias, Editor(s)

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