
Proceedings Paper
Comparing centroiding methods for Shack-Hartmann wavefront sensing with laser guide stars on an ELTFormat | Member Price | Non-Member Price |
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Paper Abstract
In this paper we present the results of a study comparing the performance of various centroiding methods on
an extended spot. Various spot shapes, in good agreement with measurements of the Sodium layer density
profile are investigated. We compare the performance of
center-of-gravity (COG) based ad cross-correlation
(CC) based methods and the matched filter (MF) algorithm. While their performance are comparable in the
case of a Gaussian Sodium profile, we show that, above 15 to 20m
off-axis, substantial differences appear in the
case of a known non-Gaussian Sodium density profile. CC based and MF methods seem to have comparable or
better performance with various spot shapes while non-Gaussian shapes have dramatic impact on COG based
methods.
Paper Details
Date Published: 28 July 2010
PDF: 10 pages
Proc. SPIE 7736, Adaptive Optics Systems II, 77361A (28 July 2010); doi: 10.1117/12.856688
Published in SPIE Proceedings Vol. 7736:
Adaptive Optics Systems II
Brent L. Ellerbroek; Michael Hart; Norbert Hubin; Peter L. Wizinowich, Editor(s)
PDF: 10 pages
Proc. SPIE 7736, Adaptive Optics Systems II, 77361A (28 July 2010); doi: 10.1117/12.856688
Show Author Affiliations
Damien Gratadour, LESIA, CNRS, Observatoire de Paris à Meudon, Univ. Paris-Diderot (France)
Eric Gendron, LESIA, CNRS, Observatoire de Paris à Meudon, Univ. Paris-Diderot (France)
Thierry Fusco, ONERA (France)
Eric Gendron, LESIA, CNRS, Observatoire de Paris à Meudon, Univ. Paris-Diderot (France)
Thierry Fusco, ONERA (France)
Gerard Rousset, LESIA, CNRS, Observatoire de Paris à Meudon, Univ. Paris-Diderot (France)
Serge Meimon, ONERA (France)
Serge Meimon, ONERA (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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