Monitoring the surface-layer turbulence at the Calern Observatory with a sonic anemometer

Eric Aristidi; Yan Fantéï-caujolle; Christophe Giordano; Aziz Ziad; Julien Chabé

doi:10.1117/12.2628933

29 August 2022 Monitoring the surface-layer turbulence at the Calern Observatory with a sonic anemometer

Eric Aristidi, Yan Fantéï-caujolle, Christophe Giordano, Aziz Ziad, Julien Chabé

Proceedings Volume 12185, Adaptive Optics Systems VIII; 1218564 (2022) https://doi.org/10.1117/12.2628933
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

We analyse atmospheric turbulence data provided by a sonic anemometer at the Calern observatory (South of France). The instrument was located on a 4m high tower above the ground, and monitored meteorological parameters (temperature, wind speed) and optical turbulence (C²_T, C²_n ) inside the surface layer. We collected about 200 000 data points during one year campaign (from Dec. 2019 to Nov. 2020), and present statistics of the monitoring. We found a median C²_n of 9.10⁻¹⁵m^−2/3, with a strong dependence with the time of the day. Results show a good agreement with data from other instruments of the Calern Atmospheric Turbulence Station, CATS.

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Eric Aristidi, Yan Fantéï-caujolle, Christophe Giordano, Aziz Ziad, and Julien Chabé "Monitoring the surface-layer turbulence at the Calern Observatory with a sonic anemometer", Proc. SPIE 12185, Adaptive Optics Systems VIII, 1218564 (29 August 2022); https://doi.org/10.1117/12.2628933

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