Results 31 to 40 of about 947,860 (252)

Criteria for the assessment of the influence of atmospheric turbulence on wind turbine noise propagation

open access: yesActa Acustica, 2023
This paper investigates the influence of atmospheric turbulence on the propagation of wind turbine noise using an aeroacoustic source model coupled with a parabolic equation propagation model.
Kayser Bill   +2 more
doaj   +1 more source

Settling and clustering of snow particles in atmospheric turbulence [PDF]

open access: yesJournal of Fluid Mechanics, 2020
The effect of turbulence on snow precipitation is not incorporated into present weather forecasting models. Here we show evidence that turbulence is in fact a key influence on both fall speed and spatial distribution of settling snow.
Cheng Li   +7 more
semanticscholar   +1 more source

Beam Properties of a Partially Coherent Beam Propagating Horizontally in Atmospheric Turbulence

open access: yesPhotonics, 2023
This study explored the impact of atmospheric turbulence on partially coherent light propagation. Atmospheric turbulence causes random modulation of the intensity and phase of light, resulting in a speckle pattern in the far field.
Zengyan Wu   +5 more
doaj   +1 more source

Atmospheric turbulence forecasting using two-stage variational mode decomposition and autoregression towards free-space optical data-transmission link

open access: yesFrontiers in Physics, 2022
Free space optical communication (FSOC) is a promising technology for satellite-to-earth communication systems, where vector beams, especially orbital angular momentum (OAM), can further increase the capacity of the optical link.
Yalin Li   +14 more
doaj   +1 more source

Evaluating time domain reflectometry and coaxial impedance sensors for soil observations by the U.S. Climate Reference Network

open access: yesVadose Zone Journal, 2020
The objective of this study was to evaluate the performance of two commercial‐grade electromagnetic sensors in measuring soil water content for the U.S. Climate Reference Network (USCRN). One sensor was a 50‐MHz coaxial impedance dielectric sensor (model
Timothy B. Wilson   +8 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

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

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

Offshore Wind Turbines Will Encounter Very Low Atmospheric Turbulence [PDF]

open access: yesJournal of Physics: Conference Series, 2019
Turbulence governs the development and erosion of wind farm wakes, which can deplete the offshore wind resource. Therefore, an accurate understanding of atmospheric turbulence is required to support the rapid growth of offshore wind energy.
N. Bodini, J. Lundquist, A. Kirincich
semanticscholar   +1 more source

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