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Proceedings Paper

Accurate measurement of Cn2 profile with Shack-Hartmann data
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Paper Abstract

The precise reconstruction of the turbulent volume is a key point in the development of new-generation Adaptive Optics systems. We propose a new C2n profilometry method named CO-SLIDAR (COupled Slope and scIntillation Detection And Ranging), that uses correlations of slopes and scintillation indexes recorded on a Shack-Hartmann from two separated stars. CO-SLIDAR leads to an accurate C2n retrieval for both low and high altitude layers. Here, we present an end-to-end simulation of the C2n profile measurement. Two Shack-Hartmann geometries are considered. The detection noises are taken into account and a method to subtract the bias is proposed. Results are compared to C2n profiles obtained from correlations of slopes only or correlations of scintillation indexes only.

Paper Details

Date Published: 13 September 2012
PDF: 10 pages
Proc. SPIE 8447, Adaptive Optics Systems III, 844759 (13 September 2012); doi: 10.1117/12.925356
Show Author Affiliations
Juliette Voyez, ONERA (France)
Clélia Robert, ONERA (France)
Vincent Michau, ONERA (France)
Jean-Marc Conan, ONERA (France)
Thierry Fusco, ONERA (France)


Published in SPIE Proceedings Vol. 8447:
Adaptive Optics Systems III
Brent L. Ellerbroek; Enrico Marchetti; Jean-Pierre Véran, Editor(s)

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