CaltechAUTHORS
Published July 27, 2016 | Version Published
Book Section - Chapter Open

The statistics of atmospheric turbulence at Maunakea measured by RAVEN

Creators

  • 1. ROR icon French National Centre for Scientific Research
  • 2. ROR icon Tohoku University
  • 3. ROR icon University of Victoria
  • 4. ROR icon California Institute of Technology
  • 5. ROR icon Pontificia Universidad Católica de Chile

Contributors

Abstract

Prior statistical knowledge of the turbulence such as turbulence strength, layer altitudes and the outer scale is essential for atmospheric tomography in adaptive-optics (AO). These atmospheric parameters can be estimated from measurements of multiple Shack-Hartmann wave-front sensors (SH-WFSs) by the SLOpe Detection And Ranging (SLODAR). In this paper, we present the statistics of the vertical CN^2 and the outer scale L_0 at Maunakea in Hawaii estimated from 60 hours telemetry data in total from multiple SH-WFSs of RAVEN, which is an on-sky multi-object AO demonstrator tested on the Subaru telescope. The mean seeing during the RAVEN on-sky observations is 0.475 arcsec, and 55% turbulence is below 1.5 km. The vertical profile of CN^2 from the RAVEN SLODAR is consistent with the profiles from CFHT DIMM and MASS, and TMT site characterization.

Additional Information

© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). The research leading to these results received the support of the JSPS Grant-in-Aid for JSPS Fellows (15J02510), the JSPS Grant-in- Aid for Young Scientist (B) (23740140), the JSPS Grant-in-Aid for Scientific Research (B) (26287027) and the A*MIDEX project (no. ANR-11-IDEX-0001-02) funded by the Investissements d'Avenir French Government program, managed by the French National Research Agency (ANR).

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Additional details

Identifiers

Eprint ID
72523
Resolver ID
CaltechAUTHORS:20161202-100729857

Funding

Japan Society for the Promotion of Science (JSPS)
15J02510
Japan Society for the Promotion of Science (JSPS)
23740140
Japan Society for the Promotion of Science (JSPS)
26287027
Agence Nationale pour la Recherche (ANR)
ANR-11-IDEX-0001-02

Dates

Created
2016-12-02
Created from EPrint's datestamp field
Updated
2021-11-11
Created from EPrint's last_modified field

Caltech Custom Metadata

Series Name
Proceedings of SPIE
Series Volume or Issue Number
9909