A4 Conference proceedings

Limits of turbulence and outer scale profiling with non-Kolmogorov statistics


LUT Authors / Editors

Publication Details
Authors: Lehtonen Jonatan, Correia Carlos M., Helin Tapio
Publisher: Society of Photo-optical Instrumentation Engineers (SPIE)
Publication year: 2018
Language: English
Related Journal or Series Information: Proceedings of SPIE
Title of parent publication: Proceedings of SPIE : the International Society for Optical Engineering
Journal name in source: Proceedings of SPIE - The International Society for Optical Engineering
Volume number: 10703
ISBN: 9781510619593
ISSN: 0277-786X
eISSN: 1996-756X
JUFO-Level of this publication: 0
Open Access: Not an Open Access publication

Abstract

SLODAR (SLOpe Detection And Ranging) methods recover the atmospheric turbulence profile from crosscorrelations of wavefront sensor (WFS) measurements, based on known turbulence models. Our work grows
out of several experiments showing that turbulence statistics can deviate significantly from the classical Kolmogorov/von K´arm´an models, especially close to the ground. We present a novel SLODAR-type method which
simultaneously recovers both the turbulence profile in the atmosphere and the turbulence statistics at the ground
layer – namely the slope of the spatial frequency power law. We consider its application to outer scale (L0)-
reconstruction and investigate the limits of the joint estimation of such parameters.


Keywordsadaptive optics, non-Kolmogorov turbulence, outer scale, SLODAR, Tomography, turbulence

Last updated on 2021-10-02 at 10:25