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Proceedings Paper

Efficient iterative atmospheric tomography reconstruction from LGS and additional tip/tilt measurements
Author(s): M. Rosensteiner; R. Ramlau
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Paper Abstract

Adaptive Optics systems for the new generation of extremely large telescopes require fast mathematical methods for the computation of the shape of the deformable mirrors. MCAO or MOAO systems use laser guide stars for the reconstruction of the turbulent atmosphere. However, measurements from laser guide stars contain no information on the tip/tilt of the incoming wavefronts. Assuming that additional tip/tilt measurements of wavefronts from natural guide stars are available, we present an iterative Kaczmarz reconstructor that computes the turbulent atmospheric layers from the wavefronts of both the laser and natural guide stars. We show in particular that the resulting algorithm meets the quality and speed requirements for ELTs.

Paper Details

Date Published: 13 September 2012
PDF: 6 pages
Proc. SPIE 8447, Adaptive Optics Systems III, 84475S (13 September 2012); doi: 10.1117/12.945876
Show Author Affiliations
M. Rosensteiner, MathConsult GmbH (Austria)
R. Ramlau, Johannes Kepler Univ. of Linz (Austria)

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

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