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Proceedings Paper

Azimuth and elevation servo performance of the W.M. Keck Telescope
Author(s): Mark J. Sirota; Peter M. Thompson; Henry R. Jex
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Paper Abstract

The azimuth and elevation sources of the W.M. Keck Telescope have been designed to meet stringent tracking, offsetting, and slewing requirements. The requirements and the achieved performance are presented. The feedback architecture of the position and rate loops is described. The analysis includes an identification of the telescope structure via frequency sweep test signals. The identified model is compared with the single resonance model used in the preliminary design. As expected there are numerous additional resonances, and the effects of these on performance and stability are discussed. The autoguider loop is also discussed. Shortcomings are noted and ideas for improved performance are examined.

Paper Details

Date Published: 1 June 1994
PDF: 16 pages
Proc. SPIE 2199, Advanced Technology Optical Telescopes V, (1 June 1994); doi: 10.1117/12.176183
Show Author Affiliations
Mark J. Sirota, California Association for Research in Astronomy (United States)
Peter M. Thompson, Systems Technology, Inc. (United States)
Henry R. Jex, Systems Technology, Inc. (United States)


Published in SPIE Proceedings Vol. 2199:
Advanced Technology Optical Telescopes V
Larry M. Stepp, Editor(s)

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