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

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Lehtonen , A , Correia , C M & Helin , T 2018 , ' Limits of turbulence and outer scale profiling with non-Kolmogorov statistics ' , Proceedings of SPIE, the International Society for Optical Engineering , vol. 10703 , 107036C . https://doi.org/10.1117/12.2313960

Title: Limits of turbulence and outer scale profiling with non-Kolmogorov statistics
Author: Lehtonen, Akseli; Correia, Carlos M.; Helin, Tapio
Contributor: University of Helsinki, Department of Mathematics and Statistics
University of Helsinki, Department of Mathematics and Statistics
Date: 2018-07-30
Language: eng
Belongs to series: Proceedings of SPIE, the International Society for Optical Engineering
ISSN: 0277-786X
URI: http://hdl.handle.net/10138/310283
Abstract: SLODAR (SLOpe Detection And Ranging) methods recover the atmospheric turbulence profile from cross-correlations 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 Kármán 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.
Subject: 111 Mathematics
Inverse problems
Uncertainty analysis
Uncertainty quantification
115 Astronomy, Space science
Adaptive optics
Turbulence profiling
Non-Kolmogorov turbulence
SLODAR
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