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Hokupa'a anisoplanatism and Mauna Kea turbulence characterization

Flicker, Ralf LU and Rigaut, FJ (2002) In Publications of the Astronomical Society of the Pacific 114(799). p.1006-1015
Abstract
A data set of adaptive optics images has been analyzed in order to study the effects of angular anisoplanatism and to characterize Mauna Kea nighttime turbulence. The data set consists of a selection of Galactic center images obtained with the adaptive optics instrument Hokupa'a and the near-infrared camera QUIRC on the Gemini-North 8 m telescope. Using the Strehl ratio and the FWHM as tracers for anisoplanatism in the images, it is possible to draw conclusions about the effective turbulence height (h) over bar by model-fitting synthetic data. From the relatively small statistical sample, we obtain a median (h) over bar =3.5 km, with 10th and 90th percentiles being 2.2 and 5.6 km. The implications of these findings for a... (More)
A data set of adaptive optics images has been analyzed in order to study the effects of angular anisoplanatism and to characterize Mauna Kea nighttime turbulence. The data set consists of a selection of Galactic center images obtained with the adaptive optics instrument Hokupa'a and the near-infrared camera QUIRC on the Gemini-North 8 m telescope. Using the Strehl ratio and the FWHM as tracers for anisoplanatism in the images, it is possible to draw conclusions about the effective turbulence height (h) over bar by model-fitting synthetic data. From the relatively small statistical sample, we obtain a median (h) over bar =3.5 km, with 10th and 90th percentiles being 2.2 and 5.6 km. The implications of these findings for a turbulence-conjugated adaptive optics system are addressed. We also find the Zernike modal equivalent of Hokupa'a to be Napproximate to18, i.e., on the average slightly better than 4 radial degrees. (Less)
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type
Contribution to journal
publication status
published
subject
in
Publications of the Astronomical Society of the Pacific
volume
114
issue
799
pages
1006 - 1015
publisher
University of Chicago Press
external identifiers
  • wos:000177533600006
  • scopus:0036041852
ISSN
1538-3873
DOI
10.1086/342183
language
English
LU publication?
yes
id
13e35d8d-1c7a-4b95-9597-b63c91047754 (old id 330255)
date added to LUP
2016-04-01 12:18:53
date last changed
2022-12-11 01:39:14
@article{13e35d8d-1c7a-4b95-9597-b63c91047754,
  abstract     = {{A data set of adaptive optics images has been analyzed in order to study the effects of angular anisoplanatism and to characterize Mauna Kea nighttime turbulence. The data set consists of a selection of Galactic center images obtained with the adaptive optics instrument Hokupa'a and the near-infrared camera QUIRC on the Gemini-North 8 m telescope. Using the Strehl ratio and the FWHM as tracers for anisoplanatism in the images, it is possible to draw conclusions about the effective turbulence height (h) over bar by model-fitting synthetic data. From the relatively small statistical sample, we obtain a median (h) over bar =3.5 km, with 10th and 90th percentiles being 2.2 and 5.6 km. The implications of these findings for a turbulence-conjugated adaptive optics system are addressed. We also find the Zernike modal equivalent of Hokupa'a to be Napproximate to18, i.e., on the average slightly better than 4 radial degrees.}},
  author       = {{Flicker, Ralf and Rigaut, FJ}},
  issn         = {{1538-3873}},
  language     = {{eng}},
  number       = {{799}},
  pages        = {{1006--1015}},
  publisher    = {{University of Chicago Press}},
  series       = {{Publications of the Astronomical Society of the Pacific}},
  title        = {{Hokupa'a anisoplanatism and Mauna Kea turbulence characterization}},
  url          = {{http://dx.doi.org/10.1086/342183}},
  doi          = {{10.1086/342183}},
  volume       = {{114}},
  year         = {{2002}},
}