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Based on the theory of ionospheric conductivity and the international reference ionosphere model (IRI-2007), the Pedersen and Hall conductivity change in different phases of the solar cycle during quiet geomagnetic activity was discussed. Meanwhile, because the International Reference Ionosphere model does not reflect the polar ionospheric conductivity very well during the geomagnetic storm. So applied...
The modified Rytov theory was applied to study the Laser beam propagating through the atmospheric turbulence under the double slant path. According to the Born approximation and the kolmogorov atmosphere turbulence power spectrum, the general expression of the optical scintillation both on target's plane and on receiver's were given, and further based on the atmospheric structure constant of ITU-R,...
Usually, in laser radar, remote sensing and other optical technology application system, some dual effect will be imposed on the receive beam when it propagates through the atmosphere turbulence and reflected by the retroreflector. Under strong fluctuation, based on the extend Huygens-Fresnel principle, Rytov approximation and its modified theory, a detailed discussion about the beam reflect scintillation...
The pulse wave will be affected by the dispersion of the background medium and the scattering of the electron density irregularities while it propagates through the ionosphere turbulent medium. In this article, based on the time moment and the analytical solution of the two-frequency mutual coherence function which obtained by the method of the integral equation iteration. The time characteristic...
In order to achieve absorbing electromagnetic wave well, absorbing material usually is a composite media. Then equivalent electromagnetic parameters of composite medium should be reconstructed, so that optimum design of absorbing material can be achieved. This paper analyses the model foundation of composite material by FDTD method in detail. The reflection coefficient and scattering parameters of...
The parabolic equation which the radio wave propagation through the ionospheric irregularities was established in this paper. The Rytov and Markov approximation method was used to solve it. Derived the scintillation index of radio wave through the ionosphere. And the results was analyzed by used the power-law spectrum. The result shows that the high or low of the radio frequency, the thickness of...
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