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Thirty Meter Telescope astrometry error budget

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1117/12.2057089
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Name affiliation
  1. National Research Council of Canada. National Science Infrastructure
FormatText, Article
ConferenceAdaptive Optics Systems IV, June 22-27, 2014
SubjectCalibration; Optical telescopes; Telescopes; Astrometric measurements; Astrometry; Extremely Large Telescopes; High resolution; Mitigation methods; Multi-conjugate adaptive optics systems; Reduction strategy; Thirty Meter Telescope; Adaptive optics
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.
Publication date
PublisherSPIE
In
  • Adaptive Optics Systems IV, 91482L.
Series
  • Proceedings of SPIE, no. 9148.
LanguageEnglish
Peer reviewedYes
NPARC number21275540
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