First complete seasonal variation study of the 3D optical turbulence above San Pedro Martir Observatory

Elena Masciadri; Sebastian E. Egner

doi:10.1117/12.550777

25 October 2004 First complete seasonal variation study of the 3D optical turbulence above San Pedro Martir Observatory

Elena Masciadri, Sebastian E. Egner

Proceedings Volume 5490, Advancements in Adaptive Optics; (2004) https://doi.org/10.1117/12.550777
Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom

Abstract

The first complete seasonal variation study extended over 1 year (~80 nights uniformly distributed along twelve months) of all the principal astroclimatic parameters (C_N², seeing ε, wavefront coherence time τ_O, isoplanatic angle θ₀, scintillation rate σ_I², isoplanatic angle for the MCAO θ_M - where M is the number of the deformable mirrors DMs - M=1,2,3,...) simulated with an atmospherical model (Meso-Nh) above the San Pedro Martir Observatory is presented. The atmospherical model run in an autonomous way to simulate C_N² and wind speed vertical profiles (over ~20 km) related to the 80 nights after it has been calibrated with the support of a few C_N² measurements. All the integrated parameters are calculated using these two basic elements and general seasonal trends are put in evidence. The impact of our results on the adaptive optics techniques (AO) is discussed as well as the potentialities of the numerical simulations as a new tool for the climatologic analysis of the optical turbulence above astronomical sites.

Citation Download Citation

Elena Masciadri and Sebastian E. Egner "First complete seasonal variation study of the 3D optical turbulence above San Pedro Martir Observatory", Proc. SPIE 5490, Advancements in Adaptive Optics, (25 October 2004); https://doi.org/10.1117/12.550777

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