Simultaneous Measurements of the Fried Parameter r0 and the Isoplanatic Angle theta0 using SCIDAR and Adaptive Optics - First Results
Abstract
We present first results of a simultaneous atmospheric turbulence measurement campaign at the Calar Alto (Spain) 1.23m and 3.5m telescopes. A SCIDAR instrument and the Calar Alto Adaptive Optics system ALFA were used at the 1.23m and 3.5m telescopes respectively to determine essential turbulence parameters like the Fried parameter r0, the isoplanatic angle theta0, and, in the case of SCIDAR, the Cn2 profile of the atmosphere. Both closed-loop and open-loop data were obtained with ALFA. The desired parameters were then calculated from this. This paper shows a comparison of the results obtained from the two different systems for several times during a period of three nights.
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