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Proceedings Paper

Wavefront sensing and control performance modeling of the Thirty Meter telescope for systematic trade analyses
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Paper Abstract

We have developed an integrated optical model of the semi-static performance of the Thirty Meter Telescope. The model includes surface and rigid body errors of all telescope optics as well as a model of the Alignment and Phasing System Shack-Hartmann wavefront sensors and control algorithms. This integrated model allows for simulation of the correction of the telescope wavefront, including optical errors on the secondary and tertiary mirrors, using the primary mirror segment active degrees of freedom. This model provides the estimate of the predicted telescope performance for system engineering and error budget development. In this paper we present updated performance values for the TMT static optical errors in terms of Normalized Point Source Sensitivity and RMS wavefront error after Adaptive Optics correction. As an example of a system level trade, we present the results from an analysis optimizing the number of Shack-Hartmann lenslets per segment. We trade the number of lenslet rings over each primary mirror segment against the telescope performance metrics of PSSN and RMS wavefront error.

Paper Details

Date Published: 4 August 2014
PDF: 10 pages
Proc. SPIE 9150, Modeling, Systems Engineering, and Project Management for Astronomy VI, 91500S (4 August 2014); doi: 10.1117/12.2057157
Show Author Affiliations
Carl Nissly, Jet Propulsion Lab. (United States)
California Institute of Technology (United States)
Byoung-Joon Seo, Jet Propulsion Lab. (United States)
California Institute of Technology (United States)
Mitchell Troy, Jet Propulsion Lab. (United States)
California Institute of Technology (United States)
Gary Chanan, Univ. of California, Irvine (United States)
Scott Roberts, Thirty Meter Telescope Observatory Corp. (United States)
John Rogers, Thirty Meter Telescope Observatory Corp. (United States)


Published in SPIE Proceedings Vol. 9150:
Modeling, Systems Engineering, and Project Management for Astronomy VI
George Z. Angeli; Philippe Dierickx, Editor(s)

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