Thirty Meter Telescope astrometry error budget

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Proceedings titleSPIE - International Society for Optical Engineering. Proceedings
ConferenceAdaptive Optics Systems IV, 22 June 2014 through 27 June 2014
Article number91482L
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
AbstractThe 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.
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AffiliationNational Research Council Canada; National Science Infrastructure
Peer reviewedYes
NPARC number21275540
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Record identifierbdbfb7ac-8f33-4544-83e7-b02c0e878f7c
Record created2015-07-14
Record modified2017-04-24
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