Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

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)
Please use this url to cite or link to this publication:
author
; and
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
2016-04-01 17:13:31
date last changed
2022-12-13 00:28:40
@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}},
  keywords     = {{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          = {{https://lup.lub.lu.se/search/files/4913219/624160.pdf}},
  doi          = {{10.1051/0004-6361:20030022}},
  volume       = {{400}},
  year         = {{2003}},
}