Results 31 to 40 of about 143,052 (299)

Effect of Small-Scale Wildfires on the Air Parameters near the Burning Centers

open access: yesAtmosphere, 2021
The results of seminatural experiments on the study of steppe and field wildfires characteristic of the steppe and forest-steppe zones of Western Siberia are presented.
Egor Loboda   +10 more
doaj   +1 more source

The New Purity and Capacity Models for the OAM-mmWave Communication Systems Under Atmospheric Turbulence

open access: yesIEEE Access, 2019
The orbital angular momentum (OAM) wireless communication technology is widely studied in recent literatures. But the atmospheric turbulence is rarely considered in analyzing the capacity of OAM-based millimeter wave (OAM-mmWave) communication systems ...
Hanqiong Lou, Xiaohu Ge, Qiang Li
doaj   +1 more source

Simulation and Analysis the Attenuation Effect of Atmospheric Layers on a Laser Beam Within the Visible Range

open access: yesIbn Al-Haitham Journal for Pure and Applied Sciences, 2023
: The power and the size of the final spot of the laser beam reaching the target are very important requirements in most of the laser applications and fields such as medical, military, and scientific, so studying laser propagation in the atmosphere is a ...
Thair Abdulkareem Khalil Al-Aish   +1 more
doaj   +1 more source

An analytical model for turbulence scattered rays in the shadow zone for outdoor sound propagation calculation [PDF]

open access: yes, 2009
In outdoor sound propagation, an inherent problem of the ray tracing method is its inability to determine the sound pressure level in the shadow zone, where geometrical rays do not penetrate.
Lam, YW
core   +1 more source

Performance Analysis of Satellite-to-Ground Coherent Optical Communication System with Aperture Averaging

open access: yesApplied Sciences, 2018
The satellite-to-ground optical communication system suffers from atmosphere turbulence severely. It is well-known that the coherent detection can increase the receiver sensitivity and performing aperture averaging can reduce the scintillation caused by ...
Hongwei Li   +5 more
doaj   +1 more source

Mesoscale optical turbulence simulations above Dome C, Dome A and South Pole

open access: yes, 2010
In two recent papers the mesoscale model Meso-NH, joint with the Astro-Meso-NH package, has been validated at Dome C, Antarctica, for the characterization of the optical turbulence.
Hagelin, Susanna   +2 more
core   +1 more source

Optical Communication Through Random Atmospheric Turbulence [PDF]

open access: yes, 1969
In this paper we compare the theoretical performances of two schemes of optical communication through the atmospheric turbulence: (1) heterodyne detection and (2) video detection.
Comly, Jack   +2 more
core   +1 more source

An Atmospheric Turbulence Probe

open access: yesIEEE Transactions on Geoscience and Remote Sensing, 1980
In this paper, a complete low-cost atmospheric turbulence probe, capable of measuring temperature, differential temperature, humidity, horizontal wind speed and direction, and vertical wind component is described. Special care has been taken to minimize the probe's weight so that it may be carried easily by a balloon.
Asimakopoulos, D.N.   +3 more
openaire   +2 more sources

Multifractality via Stochasticity in Atmospheric Dynamics Description Validated through Remote Sensing Data

open access: yesMathematics, 2022
In the present paper, correlations between multifractality and stochasticity in atmospheric dynamics are investigated. Starting with two descriptions of atmospheric scenarios, one based on scale relativity theory and another based on stochastic theory ...
Dragos-Constantin Nica   +7 more
doaj   +1 more source

Effects of Asymmetry Atmospheric Eddies on Spreading and Wander of Bessel–Gaussian Beams in Anisotropic Turbulence

open access: yesIEEE Photonics Journal, 2018
The effects of asymmetry atmospheric eddies on the beam spreading and wander of Bessel–Gaussian (BG) beams in anisotropic turbulence are studied. Results show that turbulence anisotropy leads to the declines in both beam spreading and wander of BG
Mingjian Cheng   +5 more
doaj   +1 more source

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