Results 31 to 40 of about 32,736 (313)
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
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The Propagation of Sound by the Atmosphere [PDF]
Scientific American, 1916 n ...
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Variational scaling law for atmospheric propagation [PDF]
Journal of the Optical Society of America A, 2021 A new scaling law model for propagation of optical beams through atmospheric turbulence is presented and compared to a common scalar stochastic waveoptics technique. This methodology tracks the evolution of the important beam wavefront and phasefront parameters of a propagating Gaussian-shaped laser field as it moves through ...
Sophia, Potoczak Bragdon +2 more
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, 2022 S.281-291Radar propagation near the sea surface depends on meteorological conditions and sea surface roughness. Often strong gradients of humidity and temperature can be observed close to the air-water interface leading to abnormal propagation effects ...
Biegel, G. +4 more
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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
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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
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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 +6 more
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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 +2 more
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PROPAGATION OF SOUND IN AN IRREGULAR ATMOSPHERE [PDF]
Monthly Weather Review, 1919 Under poor atmospheric conditions, lower frequencies in a\"eroplane engine sounds become relatively enhanced; under good conditions, frequencies of order of 1,000 d.v. are heard at greatest distances. The former is explained by irregularities in the atmosphere and the latter by characteristics of audition.Intensity of the sound varies much more rapidly
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Propagation Delay in the Atmosphere [PDF]
Radio Science, 1972 Calculations of the propagation delay due to the atmosphere in satellite‐to‐earth communication are reported for the frequency range 1 to 15 GHz. A spherically symmetric, smoothly varying model is assumed for the atmosphere, and the techniques of geometrical optics are employed.
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