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Proceedings Paper

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

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.

Paper Details

Date Published: 28 September 2004
PDF: 6 pages
Proc. SPIE 5489, Ground-based Telescopes, (28 September 2004); doi: 10.1117/12.551533
Show Author Affiliations
Abdelouahed Abahamid, Univ. Cadi Ayyad (Morocco)
Jean Vernin, LUAN, CNRS and Univ. de Nice Sophia-Antipolis (France)
Abdelhadi Jabiri, Univ. Cadi Ayyad (Morocco)
Zouhair Benkhaldoun, Univ. Cadi Ayyad (Morocco)


Published in SPIE Proceedings Vol. 5489:
Ground-based Telescopes
Jacobus M. Oschmann, Editor(s)

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