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Proceedings Paper

Lunar scintillometer to validate GLAO turbulence distribution measurements
Author(s): Kevin Newman; Michael Hart; Eduardo Bendek; Edison Bustos
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Paper Abstract

A lunar scintillometer, LuSci, is an inexpensive and robust instrument which deploys a linear array of photodiodes pointed toward the moon to measure scintillation produced by atmospheric turbulence. Covariances between the signals from the photodiodes are analyzed to derive estimates of the turbulence profile within a few hundred meters above the ground. Instrument parameters and phase of the moon are taken into account. This method has been used for site testing and monitoring. We present the development of a new LuSci instrument used to validate the ground-layer turbulence distribution measured from the laser wavefront sensor signals of the Ground Layer Adaptive Optics system at the MMT. The near-simultaneous measurements are used to characterize the performance of the GLAO system. We describe the instrument, its operation, approaches to data reduction, and use in performance characterization of a GLAO system.­

Paper Details

Date Published: 13 September 2012
PDF: 8 pages
Proc. SPIE 8447, Adaptive Optics Systems III, 84471A (13 September 2012); doi: 10.1117/12.927127
Show Author Affiliations
Kevin Newman, Center for Astronomical Adaptive Optics, The Univ. of Arizona (United States)
Michael Hart, Center for Astronomical Adaptive Optics, The Univ. of Arizona (United States)
Eduardo Bendek, Center for Astronomical Adaptive Optics, The Univ. of Arizona (United States)
Edison Bustos, Cerro Tololo Inter-American Observatory (Chile)


Published in SPIE Proceedings Vol. 8447:
Adaptive Optics Systems III
Brent L. Ellerbroek; Enrico Marchetti; Jean-Pierre Véran, Editor(s)

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