Monitoring daytime and nighttime optical turbulence profiles with the PML instrument

Eric Aristidi (1) , Aziz Ziad (1) , Yan Fanteï-Caujolle (1) , Julien Chabé (2) , Christophe Giordano (1) , Catherine Renaud (1) , Henri Lanteri (1)

1 LAGRANGE - Joseph Louis LAGRANGE
2 GEOAZUR 7329 - Géoazur

The Profiler of Moon Limb is a recent instrument dedicated to the monitoring of optical turbulence profile of the atmosphere. Fluctuations of the Moon or the Sun limb allow to evaluate the index refraction structure constant C 2 n (h) and the wavefront coherence outer scale L 0 (h) as a function of the altitude h. The atmosphere is split into 33 layers with an altitude resolution varying from 100m (at the ground) to 2km (in the upper atmosphere). Profiles are obtained every 3mn during daytime and nighttime. We report last advances on the instrument and present some results obtained at the Plateau de Calern (France).

Mots clés: turbulence; instrumentation; Site testing

Domaines: Astrophysique [astro-ph]

Eric Aristidi, Aziz Ziad, Yan Fanteï-Caujolle, Julien Chabé, Christophe Giordano, et al.. Monitoring daytime and nighttime optical turbulence profiles with the PML instrument. AO4ELT6, Jun 2019, Québec, Canada. ⟨hal-02475443⟩