Simultaneous Measurements of the Fried Parameter r₀ and the Isoplanatic Angle theta₀ using SCIDAR and Adaptive Optics - First Results

2001/01/26 by A. R. Weiss, S. Hippler, Weiss, A. R. +7
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #astro-ph

paper · pdf · doi:10.48550/arxiv.astro-ph/0101474

10 pages, 6 figures, Marrakech Site 2000 conference proceedings

arxiv created 2001/01/26 · arxiv updated 2009/12/01

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 C_n² 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.

Related

• Optical Turbulence Characterization at LAMOST Site: Observations and Models
• Optical turbulence profiling with Stereo-SCIDAR for VLT and ELT
• Measurement of isoplanatic angle and turbulence strength profile from H-alpha images of the Sun
• LOLAS-2 : redesign of an optical turbulence profiler
• The Development of Single Star Scidar for Tibet and Dome A