Ground-layer turbulence profiling using a lunar SHABAR

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

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

2 Citations (Scopus)

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.

Original languageEnglish
Title of host publicationGround-based and Airborne Instrumentation for Astronomy
Place of PublicationBellingham, Wash.
PublisherSPIE
Pages1-9
Number of pages9
Volume6269 III
ISBN (Print)0819463345, 9780819463340
DOIs
Publication statusPublished - 2006
Externally publishedYes
EventGround-based and Airborne Instrumentation for Astronomy - Orlando, FL, United States
Duration: 25 May 200629 May 2006

Other

OtherGround-based and Airborne Instrumentation for Astronomy
CountryUnited States
CityOrlando, FL
Period25/05/0629/05/06

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