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Controlling a telescope chopping secondary mirror assembly using a signal deconvolution technique

Houde, Martin and Holt, Lynn C. and Yoshida, Hiroshige and Nelson, Patrick M. (2003) Controlling a telescope chopping secondary mirror assembly using a signal deconvolution technique. Review of Scientific Instruments, 74 (8). pp. 3802-3806. ISSN 0034-6748. doi:10.1063/1.1592877.

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We describe a technique for improving the response of a telescope chopping secondary mirror assembly by using a signal processing method based on the Lucy deconvolution technique. This technique is general and could be used for any systems, linear or nonlinear, where the transfer function(s) can be measured with sufficient precision. We demonstrate how the method was implemented and show results obtained at the Caltech Submillimeter Observatory using different chop throw amplitudes and frequencies. No intervention from the telescope user is needed besides the selection of the chop throw amplitude and frequency. All the calculations are done automatically once the appropriate command is issued from the user interface of the observatory's main computer.

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Additional Information:©2003 American Institute of Physics. (Received 7 March 2003; accepted 18 May 2003) The Caltech Submillimeter Observatory is funded by the NSF through Contract No. AST 9980846. The chopping secondary mirror assembly was designed and built by R.H. Hildebrand’s group at the University of Chicago and was supported by NSF Grant No. AST 8917950.
Subject Keywords:deconvolution; mirrors; radiotelescopes; transfer functions
Issue or Number:8
Record Number:CaltechAUTHORS:HOUrsi03
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:6904
Deposited By: Archive Administrator
Deposited On:01 Jan 2007
Last Modified:08 Nov 2021 20:37

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