Optical turbulence outer scale and coherence outer scale at different astronomical sites

Details Optical turbulence outer scale and coherence outer scale at different astronomical sites Optical turbulence outer scale and coherence outer scale at different astronomical sites

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004spie.5489..190a&link_type=abstract

Ground-based Telescopes. Edited by Oschmann, Jacobus M., Jr. Proceedings of the SPIE, Volume 5489, pp. 190-195 (2004).

Physics

Scientific paper

Here we analyse 168 optical turbulence profiles made at nine different locations worldwide by means of free flight balloons equipped with instrumentation. Optical turbulence outer scales Lo, as well as coherence outer scales lo are derived for the different locations and taking into account the contribution of the surface layer [0, 50m], the boundary layer [0, 1km] and the free atmosphere [1km, 30km]. Noticeable changes are found between the different locations, mainly due to the boundary layer contribution. The free atmosphere contribution seems almost the same for each site. There is a very good coherence between the outer scale derived by us and that measured using the Generalized Seeing Monitor (GSM) technique.

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