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Proceedings Paper

Impact of Cn2 profile structure on wide-field AO performance
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Paper Abstract

WFAO systems are in their design phase for the ELTs. MCAO (MAORY), LTAO (ATLAS) and MOAO (EAGLE) approaches have been analyzed for the E-ELT. All these approaches require a precise tomographic reconstruction of the turbulent volume. In that frame, Cn2 profiles come up at two levels: the input "true" profile, and the prior profile used as a regularization in the tomographic reconstruction. The impacts of the structure and the complexity of the Cn2 profile on the residual error after tomographic reconstruction are analyzed and discussed. We show that isoplanatic angle is not sufficient to characterize profiles in WFAO. We highlight the importance of a well sampled Cn2 input profile and prior profile to be considered in the tomographic reconstructor.

Paper Details

Date Published: 27 July 2010
PDF: 10 pages
Proc. SPIE 7736, Adaptive Optics Systems II, 77360J (27 July 2010); doi: 10.1117/12.857489
Show Author Affiliations
Thierry Fusco, ONERA (France)
Anne Costille, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)

Published in SPIE Proceedings Vol. 7736:
Adaptive Optics Systems II
Brent L. Ellerbroek; Michael Hart; Norbert Hubin; Peter L. Wizinowich, Editor(s)

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