Atmospheric Optical Turbulence: Measuring, Forecasting, Modelling and Correcting

A special issue of Atmosphere (ISSN 2073-4433). This special issue belongs to the section "Atmospheric Techniques, Instruments, and Modeling".

Deadline for manuscript submissions: closed (15 December 2020) | Viewed by 2831

Special Issue Editor


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Guest Editor
Centre for Advanced Instrumentation, University of Durham, Durham DH1 3LE, UK
Interests: atmospheric turbulence; instrumentation; modelling; forecasting; applications of optical propagation

Special Issue Information

Dear Colleagues,

Optical propagation through the Earth’s atmosphere is exploited by several fields including, for example, free-space optical communications and optical astronomy. Optical turbulence in the Earth’s atmosphere causes a distortion of the wavefront and leads to detrimental performance of these systems.

In free-space optical communications, optical turbulence leads to beam broadening and wander, ultimately resulting in reduced signal, increased fade events and increased bit-error-rates. This is particularly true in strong turbulence conditions over large horizontal distances or links between the ground and orbiting satellites.

In astronomy, the optical turbulence severely degrades the angular resolution. Without correction, these aberrations reduce the world’s largest telescope to ‘light buckets’.

In both applications, adaptive optics systems can be used to correct for the detrimental effects of the optical turbulence. The performance of these systems is fundamentally limited by the temporal and spatial structure as well as the magnitude of the turbulence. Therefore, high-fidelity measuring, forecasting and modelling is essential to the design and operation of these systems.

Optical turbulence is a dynamic and complex process, making measurements, models, forecasts and correction an active and interdisciplinary research area with significant overlap between the topics. In this Special Issue, we invite colleagues working in this active and important area to submit ground-breaking articles and to help to create an interdisciplinary knowledge base of the state-of-the-art developments in the field.

Dr. James Osborn
Guest Editor

Manuscript Submission Information

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Keywords

  • atmospheric optical turbulence
  • forecasting atmospheric turbulence
  • measuring atmospheric turbulence
  • correcting atmospheric turbulence
  • modelling atmospheric turbulence
  • applications of optical propagation through the turbulent atmosphere

Published Papers (1 paper)

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Research

11 pages, 737 KiB  
Article
Modified Method to Detect the Turbulent Layers in the Atmospheric Boundary Layer for the Large Solar Vacuum Telescope
by Artem Yurievich Shikhovtsev, Pavel Gavrilovich Kovadlo, Alexander Victorovich Kiselev, Dmitriy Yurievich Kolobov, Vladimir Petrovich Lukin, Ivan Victorovich Russkikh and Maxim Yurievich Shikhovtsev
Atmosphere 2021, 12(2), 159; https://doi.org/10.3390/atmos12020159 - 26 Jan 2021
Cited by 7 | Viewed by 1991
Abstract
A method to detect the atmospheric turbulent layers using a single Shack–Hartmann wavefront sensor is discussed. In order to determine the height distribution of the atmospheric turbulence above a telescope, we register the wavefront distortions at different regions of the aperture from a [...] Read more.
A method to detect the atmospheric turbulent layers using a single Shack–Hartmann wavefront sensor is discussed. In order to determine the height distribution of the atmospheric turbulence above a telescope, we register the wavefront distortions at different regions of the aperture from a single light solar object moving in time. Changes of the spatial position of the solar object on the sky give us the possibility to estimate the angular shift of an object. Cross-correlation analysis of the low-frequency component of wavefront slopes spaced on the telescope aperture at different times allows us to estimate characteristics for different atmospheric layers. Knowledge of the height profiles of atmospheric turbulence as well as the Fried parameter is critical for wide-field adaptive optics (AO). Full article
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