| Autor: |
Jandieri, George, Ishimaru, Akira, Gavrilenko, Vladimir, Mchedlishvili, Nino, Kharshiladze, Oleg |
| Předmět: |
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| Zdroj: |
Bulletin of Tbilisi International Center of Mathematics & Informatics; 2023, Vol. 27 Issue 2, p81-94, 14p |
| Abstrakt: |
Ionospheric scintillation effects are investigated in the high-latitude conductive collisional ionospheric magnetized (COCOIMA) plasma by calculating the statistical characteristics of multiply scattered radio waves (RW) applying the modified perturbation method. Polarization coefficients in the polar COCOIMA plasma are derived for the first time. Differential equation for a random phase is derived. The variance and the auto-correlation function are obtained for any auto-correlation function of electron density fluctuations considering diffraction effects. Statistical moments contain: complex refractive index, polarization coefficients of both extraordinary and ordinary waves; orientation of an external magnetic field, Pedersen, Halls and longitudinal conductivities, parameters of elongated plasmonic irregularities and the velocity of a plasma flow. The scintillation level of scattered radio waves (RW) in the COCOIMA plasma is computed for the first time using zeroth, 1 st and square root 2nd moments of the power spectra. Oscillations of the scintillation spectrum are caused by the Fresnel filtering effect. It is possible to solve the opposite problem - calculate the velocity of a plasma flow and restore a structure of small-scale inhomogeneities than the Fresnel radius. Numerical simulations are interpreted for 3D anisotropic Gaussian and power-law spectral functions including axial ratio and an inclination angle of prolate plasmonic structures using the IRI model. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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