Results 1 to 10 of about 20,978 (166)

Statistical Analysis of Hybrid Atmospheric Ducts over the Northern South China Sea and Their Influence on Over-the-Horizon Electromagnetic Wave Propagation

Journal of Marine Science and Engineering, 2023
Atmospheric ducts are special super-refractive atmospheric structures that can cause over-the-horizon propagation of electromagnetic waves. Different types of atmospheric ducts have different influences on electromagnetic wave propagation.
Yang Shi, Shuwen Wang, Fan Yang, Kunde Yang   +3 more
doaj   +3 more sources

Laser Beam Atmospheric Propagation Modelling for Aerospace LIDAR Applications

Atmosphere, 2021
Atmospheric effects have a significant impact on the performance of airborne and space laser systems. Traditional models used to predict propagation effects rely heavily on simplified assumptions of the atmospheric properties and their interactions with ...
Thomas Fahey, Maidul Islam, Alessandro Gardi, Roberto Sabatini   +3 more
doaj   +3 more sources

Turbulence-Resistant Femtosecond Filaments via Nonlinear Self-Guiding and OAM Modulation [PDF]

Sensors
As a prominent frontier in ultrafast laser–matter interaction, femtosecond laser filamentation holds great potential for atmospheric pollutant detection and remote sensing. However, its practical application in the open atmosphere is severely hampered by
Jinpei Liu, Xi Yang, Weiyun Jin, Zuyou Ren, Caiyi Yang, Tingting Shi   +5 more
doaj   +2 more sources

Diagnostic study of geomagnetic storm-induced ionospheric changes over very low-frequency signal propagation paths in the mid-latitude D region [PDF]

Annales Geophysicae, 2022
We performed a diagnostic study of geomagnetic storm-induced disturbances that are coupled to the mid-latitude D region by quantifying the propagation characteristics of very low-frequency (VLF) radio signals from transmitters located in Cumbria, UK ...
V. U. J. Nwankwo, W. Denig, S. K. Chakrabarti, O. Ogunmodimu, O. Ogunmodimu, M. P. Ajakaiye, J. O. Fatokun, P. I. Anekwe, O. E. Obisesan, O. E. Oyanameh, O. V. Fatoye   +10 more
doaj   +1 more source

On the propagation of waves in the atmosphere [PDF]

Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2021
The leading-order equations governing the unsteady dynamics of large-scale atmospheric motions are derived, via a systematic asymptotic approach based on the thin-shell approximation applied to the ellipsoidal model of the Earth’s geoid.
Adrian Constantin, Robin S. Johnson
openaire   +4 more sources

Atmospheric drag effects on modelled low Earth orbit (LEO) satellites during the July 2000 Bastille Day event in contrast to an interval of geomagnetically quiet conditions [PDF]

Annales Geophysicae, 2021
In this work, we simulated the atmospheric drag effect on two model SmallSats (small satellites) in low Earth orbit (LEO) with different ballistic coefficients during 1-month intervals of solar–geomagnetic quiet and perturbed conditions. The goal of this
V. U. J. Nwankwo, W. Denig, S. K. Chakrabarti, M. P. Ajakaiye, J. Fatokun, A. W. Akanni, J.-P. Raulin, E. Correia, E. Correia, J. E. Enoh, P. I. Anekwe   +10 more
doaj   +1 more source

Polarization of Radiation by the Aerosol-Gas Component of the Atmosphere for Lidar Wavelengths [PDF]

EPJ Web of Conferences, 2020
The report presents an original algorithm for solving the radiation transfer equation based on the Monte Carlo method for problems of atmospheric laser sensing, taking into account the polarization of radiation.
Zimovaya Anna, Konoshonkin Alexander
doaj   +1 more source

Uncertainty Quantification for Infrasound Propagation in the Atmospheric Environment

Applied Sciences, 2022
The propagation of infrasound in the atmosphere is influenced by atmospheric environmental parameters, which affect the precise localization of the infrasound source. Therefore, it has become crucial to quantify the influence of atmospheric environmental
Liang Yu, Xiaoquan Yi, Ran Wang, Chenyu Zhang, Tongdong Wang, Xiaopeng Zhang   +5 more
doaj   +1 more source

Is the Anisotropic Tilt Angle Necessary in the Turbulence Spectrum of Refractive-Index Fluctuations?

Frontiers in Physics, 2022
With the deepening of atmospheric turbulence research, scientists have discovered that the anisotropy of turbulence cells cannot be ignored. The anisotropic non-Kolmogorov turbulence model is more in line with the actual situation of atmospheric ...
Chao Zhai
doaj   +1 more source

On the propagation of nonlinear waves in the atmosphere

Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2022
Starting from the general equations of fluid dynamics that describe the atmosphere, and using asymptotic methods, we present the derivation of the leading-order equations for nonlinear wave propagation in the troposphere. The only simplifying assumption is that the flow in the atmosphere exists in a thin shell over a sphere.
Constantin, A., Johnson, R. S.
openaire   +4 more sources