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Proceedings Paper

Impact of sodium layer variations on the performance of the E-ELT MCAO module
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Paper Abstract

Multi-Conjugate Adaptive Optics systems based on sodium Laser Guide Stars may exploit Natural Guide Stars to solve intrinsic limitations of artificial beacons (tip-tilt indetermination and anisoplanatism) and to mitigate the impact of the sodium layer structure and variability. The sodium layer may also have transverse structures leading to differential effects among Laser Guide Stars. Starting from the analysis of the input perturbations related to the Sodium Layer variability, modeled directly on measured sodium layer profiles, we analyze, through a simplified end-to-end simulation code, the impact of the low/medium orders induced on global performance of the European Extremely Large Telescope Multi-Conjugate Adaptive Optics module MAORY.

Paper Details

Date Published: 4 August 2014
PDF: 7 pages
Proc. SPIE 9148, Adaptive Optics Systems IV, 91486Q (4 August 2014); doi: 10.1117/12.2056483
Show Author Affiliations
L. Schreiber, INAF - Osservatorio Astronomico di Bologna (Italy)
E. Diolaiti, INAF - Osservatorio Astronomico di Bologna (Italy)
C. Arcidiacono, INAF - Osservatorio Astronomico di Bologna (Italy)
T. Pfrommer, European Southern Observatory (Germany)
R. Holzlöhner, European Southern Observatory (Germany)
M. Lombini, INAF - Osservatorio Astronomico di Bologna (Italy)
P. Hickson, The Univ. of British Columbia (Canada)

Published in SPIE Proceedings Vol. 9148:
Adaptive Optics Systems IV
Enrico Marchetti; Laird M. Close; Jean-Pierre Véran, Editor(s)

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