28 September 2004 The concept design of the Discovery Channel Telescope mount
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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.
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David S. Porter, David S. Porter, Thomas A. Sebring, Thomas A. Sebring, Byron Smith, Byron Smith, David Finley, David Finley, Fred Baine, Fred Baine, Kerstan G. Hermann, Kerstan G. Hermann, } "The concept design of the Discovery Channel Telescope mount", Proc. SPIE 5489, Ground-based Telescopes, (28 September 2004); doi: 10.1117/12.552343; https://doi.org/10.1117/12.552343
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