29 September 2017 Preliminary results from the Stereo-SCIDAR at the VLT Observatory: extraction of reference atmospheric turbulence profiles for E-ELT adaptive optics instrument performance simulations
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Abstract
The Stereo-SCIDAR (Scintillation Detection and Ranging) atmospheric turbulence profiler, built for ESO by Durham University, observes the scintillation patterns of binary elements with one of the four VLT-Interferometer 1.8m auxiliary telescopes at the ESO Paranal Observatory. The primary products are the vertical profiles of the index of refraction structure coefficient and of the wind velocity which allow to compute the wavefront coherence time and the isoplanatic angle with a vertical resolution of 250m. The several thousands of profiles collected during more than 30 nights of operation are grouped following criteria based on the altitude distribution or on principal component analysis. A set of reference profiles representative of the site is proposed as input for the various simulation models developed by the E-ELT (European Extremely Large Telescope) instruments Consortia.
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Marc S. Sarazin, Marc S. Sarazin, James Osborn, James Osborn, Arlette Chacon-Oelckers, Arlette Chacon-Oelckers, Frédéric J. Dérie, Frédéric J. Dérie, Miska Le Louarn, Miska Le Louarn, Julien Milli, Julien Milli, Julio Navarrete, Julio Navarrete, Richard R. W. Wilson, Richard R. W. Wilson, } "Preliminary results from the Stereo-SCIDAR at the VLT Observatory: extraction of reference atmospheric turbulence profiles for E-ELT adaptive optics instrument performance simulations ", Proc. SPIE 10425, Optics in Atmospheric Propagation and Adaptive Systems XX, 104250B (29 September 2017); doi: 10.1117/12.2279675; https://doi.org/10.1117/12.2279675
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