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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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organization
publishing date
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
2007-08-17 12:58:17
date last changed
2017-01-01 05:02:05
@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},
  volume       = {114},
  year         = {2002},
}