Results 11 to 20 of about 26,913 (214)

Simulation and Analysis of Mie-Scattering Lidar-Measuring Atmospheric Turbulence Profile [PDF]

open access: yesSensors, 2022
Based on the residual turbulent scintillation theory, the Mie-scattering lidar can measure the intensity of atmospheric turbulence by detecting the light intensity scintillation index of the laser return signal.
Yuqing Lu   +7 more
doaj   +2 more sources

Improved equivalent optical turbulence method for anisotropic compressible and atmospheric turbulence under different beam transmission distances [PDF]

open access: yesScientific Reports
The impact of different turbulence on beams can be seen as optical distortions caused by refractive index fluctuations around vortices in turbulence. Therefore, from the perspective of transmission effects, the transmission outcomes of beam in different ...
Wenjie Wu, Jinyu Xie, Lu Bai
doaj   +2 more sources

Atmospheric Turbulence Phase Reconstruction via Deep Learning Wavefront Sensing [PDF]

open access: yesSensors
The fast and accurate reconstruction of the turbulence phase is crucial for compensating atmospheric disturbances in free-space coherent optical communication. Traditional methods suffer from slow convergence and inadequate phase reconstruction accuracy.
Yutao Liu, Mingwei Zheng, Xingqi Wang
doaj   +2 more sources

Automatic Quantification of Atmospheric Turbulence Intensity in Space-Time Domain [PDF]

open access: yesSensors
Quantifying atmospheric turbulence intensity is a challenging task, particularly when assessing real-world scenarios. In this paper, we propose a deep learning method for quantifying atmospheric turbulence intensity based on the space-time domain ...
Damián Gulich   +2 more
doaj   +2 more sources

The fractal turbulent–non-turbulent interface in the atmosphere

open access: yesWind Energy Science, 2023
Abstract. With their constant increase in size, wind turbines are reaching unprecedented heights. Therefore, at these heights, they are influenced by wind conditions that have not yet been studied in detail. With increasing height, a transition to laminar conditions becomes more and more likely.
L. Neuhaus   +5 more
openaire   +3 more sources

Effects of Atmospheric Coherent Time on Inverse Synthetic Aperture Ladar Imaging through Atmospheric Turbulence

open access: yesRemote Sensing, 2023
Inverse synthetic aperture ladar (ISAL) can achieve high-resolution images for long-range moving targets, while its performance is affected by atmospheric turbulence.
Azezigul Abdukirim   +6 more
doaj   +1 more source

Propagation Properties of an Astigmatic Cos-Gaussian Beam through Turbulent Atmosphere [PDF]

open access: yesE3S Web of Conferences, 2021
We use the extended Huygens-Fresnel integral to investigate the propagation properties of a cos-Gaussian beam (cosGB) with astigmatism in atmospheric turbulence.
Zhu Kaicheng   +4 more
doaj   +1 more source

The effect of atmospheric turbulence on the performance of the free space optical communications [PDF]

open access: yes, 2008
In free space optical (FSO) communication links, atmospheric turbulence has a significant impact on the quality of a laser beam propagating through the atmosphere.
Ghassemlooy, Zabih   +7 more
core   +1 more source

Ergodicity test of the eddy-covariance technique [PDF]

open access: yesAtmospheric Chemistry and Physics, 2015
The ergodic hypothesis is a basic hypothesis typically invoked in atmospheric surface layer (ASL) experiments. The ergodic theorem of stationary random processes is introduced to analyse and verify the ergodicity of atmospheric turbulence measured using ...
J. Chen, Y. Hu, Y. Yu, S. Lü
doaj   +1 more source

Performance of BPSK subcarrier intensity modulation free-space optical communications using a log-normal atmospheric turbulence model [PDF]

open access: yes, 2010
In this paper, we present simulation results for the bit error rate (BER) performance and the fading penalty of a BPSK - subcarrier intensity modulation (BPSK-SIM) free-space optical (FSO) communication link in a log-normal atmospheric turbulence model ...
S. S. Muhammad   +13 more
core   +1 more source

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