G-SCIDAR measurements on Mt. Graham: recent results

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

doi:10.1117/12.671418

27 June 2006 G-SCIDAR measurements on Mt. Graham: recent results

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

Proceedings Volume 6272, Advances in Adaptive Optics II; 627257 (2006) https://doi.org/10.1117/12.671418
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

We present recent results of the atmospheric turbulence measured with a Generalized SCIDAR at Mt. Graham, running for 16 nights in 2004 and 2005 at the focus of the VATT Telescope. The principle of the data reduction process is shown, as well as the validation of the obtained results. From the reduced C²_N and wind-speed profiles, together with an estimate for the dome-seeing, the astroclimatic parameters such as seeing ε, isoplanatic angle υ₀ and wavefront coherence time τ₀ are calculated. We obtained median values for ε (0.67"±0.17"), υ₀ (2.71"±1.11") and τ₀ (3.63msec ± 1.66msec), which indicate that Mt. Graham is as an astronomical site comparable to the best ones in the world. As an application, the calculated C²_N profiles were used together with layer-transfer functions for a MCAO system to estimate the optimal conjugated heights of the DMs for the MCAO system of LINC-NIRVANA.

Citation Download Citation

Sebastian E. Egner, Elena Masciadri, Dan McKenna, T. M. Herbst, and W. Gaessler "G-SCIDAR measurements on Mt. Graham: recent results", Proc. SPIE 6272, Advances in Adaptive Optics II, 627257 (27 June 2006); https://doi.org/10.1117/12.671418

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