HF sky-wave propagation
Counter Measures for Null Direction Propagation of Antennas in Tactical High Frequency Sky Wave Communication
... direction propagation of HF radiations using sky wave ...over HF thus helping in enhancing the ...that sky wave and ground wave antennas can co work at extended ...
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Radio Propagation Prediction for HF Communications
... for HF radio communications circuits in the frequency range of 2 to 30 ...predict HF sky wave system performance and analyse ionospheric ...predict HF sky wave system ...
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Statistical Modeling of Low-Latitude Long-Distance HF Ionospheric Multi-Mode Channels
... of HF sky wave channel complex impulse response and its parameters, ...their propagation delays form multiple clusters corresponding to different propagation ...
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Volume 3, Issue 2, February 2014 Page 83
... direction propagation of HF radiations using sky wave mode was ...over HF thus helping in enhancing the ...that sky wave and ground wave antennas can co work at ...
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Novel Approach for Image Decomposition from Multiple Views
... The main advantage of capture approach is to reduce the acquisition time to a few minutes while time lapses typically require at least several hours of capture to cover as many lighting directions as possible. Most ...
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Review Article Seasonal and Regional Variability of Long-Wave Effective Radiation in China and Associated Modulating Factors
... Copyright © 2020 Qianrong Ma et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the ...
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Influence of tidal sand wave fields on wind wave propagation
... sand wave fields, wind waves will show spatial variability caused by refraction, shoaling and ...wind wave is assessed by looking to the amplification of the pre-defined amplitude of the incident wind ...
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Influence of high latitude anomalies on tropical climate phenomena and global climate
... baroclinic wave response in the equatorial ...the propagation of Kelvin and Rossby waves suggests that the response seen in the FORTE model is likely to be considerably slower than ...barotropic wave ...
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Directional spectra comparisons between HF radar and a wave model
... Wyatt, L.R., Green, J.J. and Middleditch, A. (2008) Directional spectra comparisons between HF radar and a wave model. In: Proceedings of the IEEE/OES/CMTC 9th working conference on Current Measurement ...
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Study on the ionogram variation at different solar activity and earthquake occurrence
... the HF radio waves are not reflected by ...field wave that propagates, collide with neutral molecules present in high concentrations, so by subtracting the energy waves ...
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Electromagnetic Wave Propagation in Square Law Wave Guides
... electromagnetic wave propagation takes place along the z-axis of a thin axisymmetric wave guide with radius b and with the refractive index n 2 ( r ...
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Wave propogation scattering due to defect on thin composite plates
... Formation of damage such as matrix cracking sometimes can be seen with the naked eye, however, the damage such as delamination, is a silent killer, in which case, it is almost impossible to detect from the surface of the ...
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Wave Propagation and Scour Failure of Coastal Structures due to Tsunamis
... hybrid wave generator that combined both piston-type and pump driven wave-maker to investigate the effect of tsunami run- up and force around building structures with 1:20 length ...
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Reconfigurable antennas and radio wave propagation at millimeter-wave frequencies
... For a smooth surface, the total energy of a ray is reflected in the specular direction, as it was shown in the previous section. However, in the real cases, some portion of energy is scattered in all directions due to ...
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Numerical Modeling of Ultrasound Wave Propagation.
... of wave solvers have been developed for modeling wave propagation in heterogeneous ...model wave propagation in heterogeneous ...one-way wave equation which permits smooth ...
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Wave propagation in the Lorenz-96 model
... ber 3 is born. The latter periodic orbit becomes stable at F ≈ 1.58 through a subcritical Ne˘ımark-Sacker bifurcation (orange curve) and an unstable two-dimensional invariant torus is born. Hence, for parameter values F ...
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Computer model on linear wave propagation
... i) Wave theory adopted in this study is based on linear wave theory developed by Airy, which include wave length, wave celerity, group velocity, orbital velocity, wave energy, and ...
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Effect of Ionosphere on Radio Wave Propagation
... the wave enters into the upper part of the layer of decreasing ionization, the velocity of the upper part of the wave decreases, and the wave is bent away from the ...a wave strikes a thin, ...
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An Assessment of Two Models of Wave Propagation
... simulates wave height and wave directions in the harbor during storms, although the models results 242. have a lot of similarity.[r] ...
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Ultrasonic wave propagation in heterogenous media
... detection threshold. These time-frequency pairs and corre- sponding singular values are used in the back propagation for the image reconstruction. It is clear from Figure 3 that there are more frequencies used in ...
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