Statistics of turbulence parameters at Maunakea using the multiple wavefront sensor data of RAVEN - INSU - Institut national des sciences de l'Univers Accéder directement au contenu
Article Dans Une Revue Monthly Notices of the Royal Astronomical Society Année : 2017

Statistics of turbulence parameters at Maunakea using the multiple wavefront sensor data of RAVEN

Dave R. Andersen
  • Fonction : Auteur
Olivier Lardière
  • Fonction : Auteur
Shin Oya
  • Fonction : Auteur
Masayuki Akiyama
Kate Jackson
  • Fonction : Auteur
Colin Bradley
  • Fonction : Auteur

Résumé

Prior statistical knowledge of atmospheric turbulence is essential for designing, optimizing and evaluating tomographic adaptive optics systems. We present the statistics of the vertical profiles of C_N^2 and the outer scale at Maunakea estimated using a SLOpe Detection And Ranging (SLODAR) method from on-sky telemetry taken by a multi-object adaptive optics (MOAO) demonstrator, called RAVEN, on the Subaru telescope. In our SLODAR method, the profiles are estimated by fitting the theoretical autocorrelations and cross-correlations of measurements from multiple Shack-Haltmann wavefront sensors to the observed correlations via the non-linear Levenberg-Marquardt Algorithm (LMA). The analytical derivatives of the spatial phase structure function with respect to its parameters for the LMA are also developed. From a total of 12 nights in the summer season, a large ground C_N^2 fraction of 54.3 per cent is found, with median estimated seeing of 0.460 arcsec. This median seeing value is below the results for Maunakea from the literature (0.6-0.7 arcsec). The average C_N^2 profile is in good agreement with results from the literature, except for the ground layer. The median value of the outer scale is 25.5 m and the outer scale is larger at higher altitudes; these trends of the outer scale are consistent with findings in the literature.
Fichier principal
Vignette du fichier
stw3083.pdf (1.46 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

insu-03666205 , version 1 (12-05-2022)

Identifiants

Citer

Yoshito H. Ono, Carlos M. Correia, Dave R. Andersen, Olivier Lardière, Shin Oya, et al.. Statistics of turbulence parameters at Maunakea using the multiple wavefront sensor data of RAVEN. Monthly Notices of the Royal Astronomical Society, 2017, 465, pp.4931-4941. ⟨10.1093/mnras/stw3083⟩. ⟨insu-03666205⟩
5 Consultations
9 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More