Results 21 to 30 of about 224,684 (308)

Propagation of gravity waves and spread F in the low-latitude ionosphere over Tucumán, Argentina, by continuous Doppler sounding: first results [PDF]

, 2014
Results of systematic analysis of propagation directions and horizontal velocities of gravity waves (GWs) and spread F structures in low-latitude ionosphere (magnetic inclination ~27°) in Tucumán region, Argentina, are presented.
Baše, J., Burešová, D., Cabrera, M. A., Cangemi, José Ignacio, Chum, J., Ezquer, Rodolfo Gerardo, Fišer, J., Hruška, F., Ise, Juan Eduardo, Laštovička, J., Miranda Bonomi, Fernando Alberto, Molina, Maria Graciela, Šindelářová, T.   +12 more
core   +2 more sources

Transformation of spectra of refraction index fluctuations in axisymmetric supersonic jet with the increase in the distance from the nozzle

MATEC Web of Conferences, 2017
In this paper the results of reconstruction of the radial dependence of refraction index fluctuations spectra in axisymmetric supersonic jet from laser transillumination data are presented.
Marakasov Dmitrii, Sazanovich Valentina, Tsvyk Ruvim, Shesternin Andrei   +3 more
doaj   +1 more source

Laboratory Measurements of the Influence of Turbulence Intensity on the Instantaneous-Fading Reciprocity of Bidirectional Atmospheric Laser Propagation Link

Applied Sciences, 2021
The reciprocity of the atmospheric turbulence channel in the bidirectional atmospheric laser propagation link is experimentally tested. The bidirectional transceiving coaxial atmospheric laser propagation link is built by using a hot air convection-type ...
Yi Liu, Zhi Liu, Yidi Chang, Yang Liu, Huilin Jiang   +4 more
doaj   +1 more source

Propagation Properties of Gaussian Schell-Model Beam Array in the Jet Engine Exhaust Induced Turbulence

IEEE Photonics Journal, 2020
The effects of the jet engine turbulence on a Gaussian Schell-Model (GSM) beam array propagating in a jet engine plume are studied theoretically. The analytical expressions of the cross-spectral density (CSD) function, the spectral degree of coherence ...
Yuqiu Zhang, Tianyue Hou, Qi Chang, Hongxiang Chang, Jinhu Long, Pengfei Ma, Pu Zhou   +6 more
doaj   +1 more source

Propagation to the upper atmosphere of acoustic-gravity waves from atmospheric fronts in the Moscow region [PDF]

Annales Geophysicae, 2019
The paper uses experimental data of pressure variations on the Earth's surface during the passage of an atmospheric front recorded by a network of four microbarographs in the Moscow region.
Y. Kurdyaeva, Y. Kurdyaeva, S. Kulichkov, S. Kulichkov, S. Kshevetskii, O. Borchevkina, O. Borchevkina, E. Golikova   +7 more
doaj   +1 more source

Long-term trends of foE and geomagnetic activity variations [PDF]

Annales Geophysicae, 2003
A relationship between foE trends and geomagnetic activity long-term variations has been revealed for the first time. By analogy with earlier obtained results on the foF2 trends it is possible to speak about the geomagnetic control of the foE ...
A. V. Mikhailov, B. A. de la Morena
doaj   +1 more source

Editorial for the Special Issue “Optical and Laser Remote Sensing of the Atmosphere”

Remote Sensing, 2019
This Special Issue of Remote Sensing continues a long line of related research papers covering the use of optical and laser remote sensing for quantitative measurement and imaging of chemical species and physical parameters of the atmosphere [...]
Dennis K. Killinger, Robert T. Menzies
doaj   +1 more source

Average Intensity of SLVGB for Slant Path Propagation in Atmospheric Turbulent

Results in Optics, 2021
The physical meaning of propagation characteristics of an (SLVGB) Super Lorentz vortex Gauss beam in a turbulent atmosphere is studied and analyzed. To use the method of Huygens-Fresnel integral. Likewise, to apply the ITU-R turbulence structure constant
Hussein Thary Khamees
doaj   +1 more source

Numerical Investigation on the Influence of Water Vapor Ionization on the Dynamic and Energy Deposition of Femtosecond Ultraviolet Laser Filamentation in Air

Applied Sciences, 2019
The effects of water vapor ionization on the nonlinear propagation of femtosecond laser pulses with a 248 nm wavelength are numerically investigated in this paper.
Qingwei Zeng, Lei Liu, Kejin Zhang, Shuai Hu, Taichang Gao, Chensi Weng, Ming Chen   +6 more
doaj   +1 more source

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

Acta 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, Écotière David, Gauvreau Benoit   +2 more
doaj   +1 more source