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Abstract: Current projects for large telescopes demand a proper knowledge ofatmospheric turbulence to design efficient adaptive optics systems in order toreach large Strehl ratios. However, the proper characterization of theturbulence above a particular site requires long-term monitoring. Due to thelack of long-term information on turbulence, high-altitude winds in particularwinds at the 200 mbar pressure level were proposed as a parameter forestimating the total turbulence at a particular site, with the advantage ofrecords of winds going back several decades. We present the first completestudy of atmospheric adaptive optics parameters above the Teide ObservatoryCanary Islands, Spain in relation to wind speed. On-site measurements ofCN2h profiles more than 20200 turbulence profiles from G-SCIDARobservations and wind vertical profiles from balloons have been used tocalculate the seeing, the isoplanatic angle and the coherence time. Theconnection of these parameters to wind speeds at ground and 200 mbar pressurelevel are shown and discussed. Our results confirm the well-known high qualityof the Canary Islands astronomical observatories.



Autor: B. Garcia-Lorenzo, A. Eff-Darwich, J. J. Fuensalida, J. Castro-Almazan

Fuente: https://arxiv.org/







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