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Proceedings Paper

Beyond conventional G-SCIDAR: the ground-layer in high vertical resolution
Author(s): Sebastian E. Egner; Elena Masciadri; Dan McKenna; T. M. Herbst
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Paper Abstract

By using the SCIDAR instrument at the VATT on the top of Mt. Graham and a very wide binary star with a separtion of 35", the vertical structure of the turbulence in the first few hundred meters above the telescope was measured. When using such a binary and analysing the cross-correlation images, a vertical resolution for the turbulence profile of a few tens of meters can be achieved near the ground. This permits to determine the inner structure and the wind sheer of the single turbulent layers inside the ground-layer. We present the principles and the data-reduction process of this method and show first results obtained with this method at Mt. Graham. As an application, we estimate the fraction of the turbulence between the dome of the VATT and the primary mirror of the LBT.

Paper Details

Date Published: 27 June 2006
PDF: 9 pages
Proc. SPIE 6272, Advances in Adaptive Optics II, 627256 (27 June 2006); doi: 10.1117/12.671380
Show Author Affiliations
Sebastian E. Egner, Max-Planck-Institute for Astronomy (Germany)
Elena Masciadri, INAF, Osservatorio Astrofisico di Arcetri (Italy)
Dan McKenna, Steward Observatory (United States)
T. M. Herbst, Max-Planck-Institute for Astronomy (Germany)

Published in SPIE Proceedings Vol. 6272:
Advances in Adaptive Optics II
Brent L. Ellerbroek; Domenico Bonaccini Calia, Editor(s)

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