Usage of Large Binocular Telescope pupils to estimate the local outer scale of turbulence

J. C. Guerra; A. Otarola; G. Brusa; V. Bailey; P. Hinz; E. Pinna

doi:10.1117/12.2057270

22 August 2014 Usage of Large Binocular Telescope pupils to estimate the local outer scale of turbulence

J. C. Guerra, A. Otarola, G. Brusa, V. Bailey, P. Hinz, E. Pinna

Proceedings Volume 9148, Adaptive Optics Systems IV; 914869 (2014) https://doi.org/10.1117/12.2057270
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

The design of adaptive optics systems is driven by the local characteristics of the atmospheric turbulence. Site characterization campaigns utilizing a variety of atmospheric monitoring equipment provides a statistical description of parameters such integrated seeing, vertical distribution of turbulence strength as well as the coherent time of the turbulence. Modeling work, intended to understand the operation bandwidth of adaptive optics systems make use of Kolmogorov turbulence theory as well as time series of atmospheric parameters obtained from regression analysis based on site characterization data. However, most of the time, even in the more detailed studies, one parameter though important is not measured and monitored with the same attention than the other turbulence parameters, namely, the outer scale of the turbulence. The image quality in large aperture telescopes has been shown to have an important dependence on the instantaneous magnitude of the outer scale of the turbulence. In general terms, the shorter the outer scale of the turbulence, the lower the wavefront variance over the aperture of the imaging system and consequently the higher the image quality. This study focuses in using reconstructed open loop wavefront sensor data observed simultaneously by the two apertures of the Large Binocular Telescope (LBT) to compute and monitor the outer scale of the turbulence.

Citation Download Citation

J. C. Guerra, A. Otarola, G. Brusa, V. Bailey, P. Hinz, and E. Pinna "Usage of Large Binocular Telescope pupils to estimate the local outer scale of turbulence", Proc. SPIE 9148, Adaptive Optics Systems IV, 914869 (22 August 2014); https://doi.org/10.1117/12.2057270

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
12 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Turbulence

Telescopes

Atmospheric modeling

Wavefront sensors

Wavefronts

Adaptive optics

Data modeling

Show All Keywords

Keywords/Phrases

Search In:

Publication Years