SIMBAD references

1999A&AS..137..185M - Astron. Astrophys., Suppl. Ser., 137, 185-202 (1999/May-2)

3D mapping of optical turbulence using an atmospheric numerical model I. A useful tool for the ground-based astronomy.


Abstract (from CDS):

These last years have seen the development of many devices to measure and monitor some atmospheric parameters characterizing the image degradation at the telescope focus. Many uncertainties about the possibility to forecast such parameters are real although this skill is fundamental for site testing, flexible scheduling and optimization of the performance of both interferometry and adaptive optics. We present our atmospheric numerical model, conceived to provide 3D maps of the classic meteorological parameters P, T and {vec}(V), and also 3D maps of the CN2 optical turbulent profiles. Knowing the wind {vec}(V) and the CN2 profiles, the following integrated parameters are coded: seeing ε, coherence wavefront time τAO, isoplanatic angle θAO, scintillation rate σ2I and spatial coherence outer scale L0 . The ability of the model to produce a 3D map of optical turbulence in the vicinity of a telescope and the effects of horizontal grid size are discussed. We demonstrate, for the same night, the global coherence of the different simulation outputs. Here we consider the use that this model could have in ground-based astronomy and we describe how it could be used to give a real forecast of the optical turbulence.

Abstract Copyright:

Journal keyword(s): atmospheric effects, turbulence, site testing

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