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

Jonatan Lehtonen; Carlos M. Correia; Tapio Helin

doi:10.1117/12.2313960

30 July 2018 Limits of turbulence and outer scale profiling with non-Kolmogorov statistics

Jonatan Lehtonen, Carlos M. Correia, Tapio Helin

Proceedings Volume 10703, Adaptive Optics Systems VI; 107036C (2018) https://doi.org/10.1117/12.2313960
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

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.

Citation Download Citation

Jonatan Lehtonen, Carlos M. Correia, and Tapio Helin "Limits of turbulence and outer scale profiling with non-Kolmogorov statistics", Proc. SPIE 10703, Adaptive Optics Systems VI, 107036C (30 July 2018); https://doi.org/10.1117/12.2313960

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