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Proceedings Paper

The concept design of the Discovery Channel Telescope mount
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Paper Abstract

The 4.2 m Discovery Channel Telescope requirements create interesting challenges for the Mount mechanical and control system design. The wide field of view survey telescope incorporates two operational foci: prime focus and cassegrain, either one must be available during any night's observing. The mission for observing requires fast slewing / offsets between each exposure with fast settling times to maintain the mission requirements. The prime focus arrangement includes a dedicated camera on the spider assembly and the cassegrain configuration includes a secondary mirror at the spider assembly with a dedicated instrument located at the cassegrain focus. This requirement challenges the design team to incorporate a prime focus / secondary mirror flipping mechanism within the secondary spider. The configuration requires a substantial prime focus and cassegrain payload with long focal distances creating a large inertia on the altitude axis. These are a few of the interesting challenges that are presented in this paper along with the design, trade-offs of different solutions, and the recommended design for the telescope Mount.

Paper Details

Date Published: 28 September 2004
PDF: 12 pages
Proc. SPIE 5489, Ground-based Telescopes, (28 September 2004); doi: 10.1117/12.552343
Show Author Affiliations
David S. Porter, VertexRSI (United States)
Thomas A. Sebring, Lowell Observatory (United States)
Byron Smith, Lowell Observatory (United States)
David Finley, VertexRSI (United States)
Fred Baine, VertexRSI (United States)
Kerstan G. Hermann, VertexRSI (United States)

Published in SPIE Proceedings Vol. 5489:
Ground-based Telescopes
Jacobus M. Oschmann, Editor(s)

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