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Proceedings Paper

Thirty Meter Telescope astrometry error budget
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Paper Abstract

The Thirty Meter Telescope (TMT) with its first-light multi-conjugate adaptive optics system, NFIRAOS, and high-resolution imager, IRIS, is expected to take differential astrometric measurements with an accuracy on the order of tens of micro arcsec. This requires the control, correction, characterization and calibration of a large number of error sources and uncertainties, many of which have magnitudes much in excess of this level of accuracy. In addition to designing the observatory such that very high precision and accuracy astrometric observations are enabled, satisfying the TMT requirements can only be achieved by a careful calibration, observation and data reduction strategy. In this paper, we present descriptions of the individual errors sources, how and when they apply to different astrometry science cases and the mitigation methods required for each of them, as well as example results for individual error terms and the overall error budgets for a variety of different science cases.

Paper Details

Date Published: 21 July 2014
PDF: 13 pages
Proc. SPIE 9148, Adaptive Optics Systems IV, 91482L (21 July 2014); doi: 10.1117/12.2057089
Show Author Affiliations
Matthias Schöck, Thirty Meter Telescope Observatory Corp. (United States)
Tuan Do, Univ. of Toronto (Canada)
Brent L. Ellerbroek, Thirty Meter Telescope Observatory Corp. (United States)
Luc Gilles, Thirty Meter Telescope Observatory Corp. (United States)
Glen Herriot, National Research Council Canada (Canada)
Leo Meyer, Univ. of California, Los Angeles (United States)
Ryuji Suzuki, National Astronomical Observatory of Japan (Japan)
Lianqi Wang, Thirty Meter Telescope Observatory Corp. (United States)
Sylvana Yelda, National Astronomical Observatory of Japan (Japan)

Published in SPIE Proceedings Vol. 9148:
Adaptive Optics Systems IV
Enrico Marchetti; Laird M. Close; Jean-Pierre Véran, Editor(s)

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