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Tilt anisoplanatism in laser-guide-star-based multiconjugate adaptive optics. Reconstruction of the long exposure point spread function from control loop data

Flicker, Ralf LU ; Rigaut, F J and Ellerbroek, B L (2003) In Astronomy & Astrophysics 400(3). p.1199-1207
Abstract
A method is presented for estimating the long exposure point spreadfunction (PSF) degradation due to tilt anisoplanatism in alaser-guide-star-based multiconjugate adaptive optics systems fromcontrol loop data. The algorithm is tested in numerical Monte Carlosimulations of the separately driven low-order null-mode system, and isshown to be robust and accurate with less than 10 relative error inboth H and K bands down to a natural guide star (NGS) magnitude ofmR=21, for a symmetric asterism with three NGS on a 30 arcsec radius.The H band limiting magnitude of the null-mode system due to NGSsignal-to-noise ratio and servo-lag was estimated previously to mR=19.At this magnitude, the relative errors in the reconstructed PSF andStrehl are here... (More)
A method is presented for estimating the long exposure point spreadfunction (PSF) degradation due to tilt anisoplanatism in alaser-guide-star-based multiconjugate adaptive optics systems fromcontrol loop data. The algorithm is tested in numerical Monte Carlosimulations of the separately driven low-order null-mode system, and isshown to be robust and accurate with less than 10 relative error inboth H and K bands down to a natural guide star (NGS) magnitude ofmR=21, for a symmetric asterism with three NGS on a 30 arcsec radius.The H band limiting magnitude of the null-mode system due to NGSsignal-to-noise ratio and servo-lag was estimated previously to mR=19.At this magnitude, the relative errors in the reconstructed PSF andStrehl are here found to be less than 5 and 1, suggesting that the PSFretrieval algorithm will be applicable and reliable for the full rangeof operating conditions of the null-mode system. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Instrumentation, adaptive optics, methods, statistical
in
Astronomy & Astrophysics
volume
400
issue
3
pages
1199 - 1207
publisher
EDP Sciences
external identifiers
  • wos:000181456500039
  • scopus:0037341586
ISSN
0004-6361
DOI
10.1051/0004-6361:20030022
language
English
LU publication?
yes
id
3747df13-7a4f-4ffd-b3d4-d5d0e529c0dc (old id 130566)
date added to LUP
2007-07-13 09:59:38
date last changed
2018-01-07 09:50:22
@article{3747df13-7a4f-4ffd-b3d4-d5d0e529c0dc,
  abstract     = {A method is presented for estimating the long exposure point spreadfunction (PSF) degradation due to tilt anisoplanatism in alaser-guide-star-based multiconjugate adaptive optics systems fromcontrol loop data. The algorithm is tested in numerical Monte Carlosimulations of the separately driven low-order null-mode system, and isshown to be robust and accurate with less than 10 relative error inboth H and K bands down to a natural guide star (NGS) magnitude ofmR=21, for a symmetric asterism with three NGS on a 30 arcsec radius.The H band limiting magnitude of the null-mode system due to NGSsignal-to-noise ratio and servo-lag was estimated previously to mR=19.At this magnitude, the relative errors in the reconstructed PSF andStrehl are here found to be less than 5 and 1, suggesting that the PSFretrieval algorithm will be applicable and reliable for the full rangeof operating conditions of the null-mode system.},
  author       = {Flicker, Ralf and Rigaut, F J and Ellerbroek, B L},
  issn         = {0004-6361},
  keyword      = {Instrumentation,adaptive optics,methods,statistical},
  language     = {eng},
  number       = {3},
  pages        = {1199--1207},
  publisher    = {EDP Sciences},
  series       = {Astronomy & Astrophysics},
  title        = {Tilt anisoplanatism in laser-guide-star-based multiconjugate adaptive optics. Reconstruction of the long exposure point spread function from control loop data},
  url          = {http://dx.doi.org/10.1051/0004-6361:20030022},
  volume       = {400},
  year         = {2003},
}