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Proceedings Paper

Ground-layer turbulence profiling using a lunar SHABAR
Author(s): Anna Moore; Eric Aristidi; Michael Ashley; Maurizio Busso; Maurizio Candidi; Jon Everett; Suzanne Kenyon; Jon Lawrence; D. Luong-Van; Andre Phillips; Brice Le Roux; Roberto Ragazzoni; Piero Salinari; John Storey; Melinda Taylor; Gino Tosti; Tony Travouillon
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Paper Abstract

Profiling the ground layer turbulence for daytime seeing applications using an array of photodiodes has been documented in literature, in particular by Beckers who coined the term "SHABAR" for the instrument, short for Shadow Band Ranger. In this case the photodiodes measure the variation of solar intensity as a function of time and the correlation of scintillation between spatially separated scintillometers can be used to derive structure constant values for the lower 100m or so. More recently SHABARs have been applied to night time atmospheric profiling using the moon as the extended source, such as the Pan-STARRS lunar SHABAR, a more challenging venture given the lower structure constant values and therefore higher sensitivity required. We present a summary of the lunar SHABAR currently operating at the Antarctic site of Dome C, one of the three Gattini site testing instruments for the Italian-led IRAIT project. The SHABAR was designed with low noise performance in mind and for low temperature operation. Ground layer profiling is of particular importance at the Dome C site during winter-time as it is known the majority of the integrated seeing measured at ground level is created in a turbulent layer very close to the ground.

Paper Details

Date Published: 29 June 2006
PDF: 9 pages
Proc. SPIE 6269, Ground-based and Airborne Instrumentation for Astronomy, 62695U (29 June 2006); doi: 10.1117/12.672640
Show Author Affiliations
Anna Moore, California Institute of Technology (United States)
Eric Aristidi, LUAN, Univ. de Nice (France)
Michael Ashley, Univ. of New South Wales (Australia)
Maurizio Busso, Univ. di Perugia (Italy)
Maurizio Candidi, Istituto di Fisica dello Spazio, CNR (Italy)
Jon Everett, Univ. of New South Wales (Australia)
Suzanne Kenyon, Univ. of New South Wales (Australia)
Jon Lawrence, Univ. of New South Wales (Australia)
D. Luong-Van, Univ. of New South Wales (Australia)
Andre Phillips, Univ. of New South Wales (Australia)
Brice Le Roux, Osservatorio Astrofisico di Arcetri (Italy)
Roberto Ragazzoni, Osservatorio Astrofisico di Arcetri (Italy)
Piero Salinari, Osservatorio Astrofisico di Arcetri (Italy)
John Storey, Univ. of New South Wales (Australia)
Melinda Taylor, Univ. of New South Wales (Australia)
Gino Tosti, Univ. di Perugia (Italy)
Tony Travouillon, California Institute of Technology (United States)

Published in SPIE Proceedings Vol. 6269:
Ground-based and Airborne Instrumentation for Astronomy
Ian S. McLean; Masanori Iye, Editor(s)

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