Determination of the Structural Characteristic of the Refractive Index of Optical Waves in the Atmospheric Boundary Layer with Remote Acoustic Sounding Facilities

Odintsov,; Гладких,; Kamardin,; Nevzorova,

doi:10.3390/atmos10110711

Cited by 19 publications

(9 citation statements)

References 29 publications

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“…Below, for calculations of atmospheric turbulence characteristics, we used long-period quasicontinuous measurement data of the sonic anemometer (from January 2023 to December 2023). Thanks Based on the 1-year measurements with sonic anemometer, the 3 minute average values of C 2 n were obtained [25]. Table 1 contains the calculated percentiles of C 2 n in the surface layer of the atmosphere.…”

Section: Analysis Of Sonic Measurements Within the Atmospheric Surfac...mentioning

confidence: 99%

Optical turbulence vertical distribution at the Peak Terskol Observatory and Mt. Kurapdag

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Kopylov,

Potanin

et al. 2024

Preprint

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Atmospheric turbulence characteristics are essential in determining the quality of astronomical images and implementing adaptive optics systems. In this study, the vertical distributions of optical turbulence at the Peak Terskol observatory (43.27472 ° N 42.50083 ° E, 3127 m a.s.l.) using the Era-5 re-analysis and scintillation measurements are investigated. For the closest reanalysis grid node to the observatory, vertical profiles of the structural constant of the air refractive index turbulent fluctuations Cn2 were obtained. The calculated Cn2(z) vertical profiles are compared with the vertical distribution of turbulence intensity obtained from tomographic measurements with Shack-Hartmann sensor. The atmospheric coherence length at the location of Terskol Peak was estimated. Using combination of atmospheric models and scheme paramaterization of turbulence, Cn2(z) profiles at Mt. Kurapdag were obtained. The values of atmospheric coherence length at the Peak Terskol are compared with estimated values of this length at the ten astronomical sites including Ali, Lenghu and Daocheng.

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Section: Analysis Of Sonic Measurements Within the Atmospheric Surfac...mentioning

confidence: 99%

Optical turbulence vertical distribution at the Peak Terskol Observatory and Mt. Kurapdag

---,

Kopylov,

Potanin

et al. 2024

Preprint

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“…In addition, using the Radiosonde and sounding balloon, turbulence profile can be acquired at high spatial resolutions [18][19][20][21][22]. In the near-surface, researchers mostly use the relationship between C 2 n and the temperature structure constant C 2 T [23][24][25]. A large aperture scintillometer (LAS) can measure the path-averaged C 2 n within a certain distance in high time resolution, which is also a common instrument using the intensity scintillation principle [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Turbulence Detection in the Atmospheric Boundary Layer Using Coherent Doppler Wind Lidar and Microwave Radiometer

Jiang

Yuan

et al. 2022

Remote Sensing

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The refractive index structure constant (Cn2) is a key parameter used in describing the influence of turbulence on laser transmissions in the atmosphere. Three different methods for estimating Cn2 were analyzed in detail. A new method that uses a combination of these methods for continuous Cn2 profiling with both high temporal and spatial resolution is proposed and demonstrated. Under the assumption of the Kolmogorov “2/3 law”, the Cn2 profile can be calculated by using the wind field and turbulent kinetic energy dissipation rate (TKEDR) measured by coherent Doppler wind lidar (CDWL) and other meteorological parameters derived from a microwave radiometer (MWR). In a horizontal experiment, a comparison between the results from our new method and measurements made by a large aperture scintillometer (LAS) is conducted. The correlation coefficient, mean error, and standard deviation between them in a six-day observation are 0.8073, 8.18 × 10−16 m−2/3, and 1.27 × 10−15 m−2/3, respectively. In the vertical direction, the continuous profiling results of Cn2 and other turbulence parameters with high resolution in the atmospheric boundary layer (ABL) are retrieved. In addition, the limitation and uncertainty of this method under different circumstances were analyzed, which shows that the relative error of Cn2 estimation normally does not exceed 30% under the convective boundary layer (CBL).

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“…Для проектирования и уточнения технических характеристик как классической системы адаптивной оптики (АО), так и мультисистемы АО необходима информация о структуре турбулентности в атмосферном пограничном слое и свободной атмосфере [Больбасова и др., 2021;Клейменов и др., 2021;Rasouli et al, 2009;Rasouli, Rajabi, 2016]. В частности, необходимо знать вертикальные профили структурной характеристики турбулентных флукту-А.Ю.…”

Section: Introductionunclassified

Turbulent parameters at different heights in the atmosphere. Shack–Hartmann wavefront sensor data

Shikhovtsev

Kiselev

Kovadlo

et al. 2022

Solnechno-Zemnaya Fizika

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The paper presents the results of studies of wavefront distortions at different heights in the atmosphere. We have used measurement wavefront data to determine optical turbulence parameters along the line of sight of the Large Solar Vacuum Telescope. Through cross-correlation analysis of differential motions of sunspots at spaced wavefront sensor subapertures, we determined turbulent parameters at different heights at the Large Solar Vacuum Telescope site. The differential motions of sunspots characterize the small-scale structure of turbulent phase distortions in the atmosphere. Synchronous temporal changes in the amplitude of these distortions at certain regions of the telescope aperture are conditioned by turbulent layers at different heights. We have estimated the contribution of optical turbulence to integral distortions at the telescope aperture for layers 0–0.6, 0.6–1.1, 1.1–1.7 km. The contribution of optical turbulence concentrated in a 1.7 km atmospheric layer to the wavefront distortions at the aperture telescope is shown to be ~43 %.

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Determination of the Structural Characteristic of the Refractive Index of Optical Waves in the Atmospheric Boundary Layer with Remote Acoustic Sounding Facilities

Cited by 19 publications

References 29 publications

Optical turbulence vertical distribution at the Peak Terskol Observatory and Mt. Kurapdag

Optical turbulence vertical distribution at the Peak Terskol Observatory and Mt. Kurapdag

Turbulence Detection in the Atmospheric Boundary Layer Using Coherent Doppler Wind Lidar and Microwave Radiometer

Turbulent parameters at different heights in the atmosphere. Shack–Hartmann wavefront sensor data

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