Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-01-26
Astronomy and Astrophysics
Astrophysics
10 pages, 6 figures, Marrakech Site 2000 conference proceedings
Scientific paper
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 r_0, the isoplanatic angle theta_0, and, in the case of SCIDAR, the C_n^2 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.
Hippler Stefan
Kasper Markus E.
Quartel John C.
Weiss Robert A.
Wooder Nicholas J.
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