Beyond conventional G-SCIDAR: the ground-layer in high vertical resolution

Sebastian E. Egner; Elena Masciadri; Dan McKenna; T. M. Herbst

doi:10.1117/12.671380

27 June 2006 Beyond conventional G-SCIDAR: the ground-layer in high vertical resolution

Sebastian E. Egner, Elena Masciadri, Dan McKenna, T. M. Herbst

Proceedings Volume 6272, Advances in Adaptive Optics II; 627256 (2006) https://doi.org/10.1117/12.671380
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

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.

Citation Download Citation

Sebastian E. Egner, Elena Masciadri, Dan McKenna, and T. M. Herbst "Beyond conventional G-SCIDAR: the ground-layer in high vertical resolution", Proc. SPIE 6272, Advances in Adaptive Optics II, 627256 (27 June 2006); https://doi.org/10.1117/12.671380

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