Abstract
Influence of temporal fluctuations of both electron density and external magnetic field fluctuations on scattered ordinary and extraordinary waves in magnetized plasma is investigated using the ray-(optics) method. Transport equation for frequency fluctuations of scattered radiation has been derived. Broadening of the spatial power spectrum and amplification of the intensity of frequency fluctuation taking into account geometry of the task and the features of turbulent magnetized plasma is analyzed for the anisotropic Gaussian correlation function using the remote sensing data. It is shown that spatial-temporal fluctuations of electron density and external magnetic field, anisotropy and angle of inclination of prolate irregularities relative to the external magnetic field may lead to the exponential amplification of the intensity of frequency fluctuations of scattered electromagnetic waves in the collisional magnetized plasma.
Highlights
Many papers are devoted to the theoretical investigation and observations of statistical characteristics of scattered radiation in the ionosphere [1,2]
Broadening of the spatial power spectrum and amplification of the intensity of frequency fluctuation taking into account geometry of the task and the features of turbulent magnetized plasma is analyzed for the anisotropic Gaussian correlation function using the remote sensing data
It is shown that spatial-temporal fluctuations of electron density and external magnetic field, anisotropy and angle of inclination of prolate irregularities relative to the external magnetic field may lead to the exponential amplification of the intensity of frequency fluctuations of scattered electromagnetic waves in the collisional magnetized plasma
Summary
Many papers are devoted to the theoretical investigation and observations of statistical characteristics of scattered radiation in the ionosphere [1,2]. Second order statistical moments of scattered electromagnetic waves in the ionospheric plasma at random variations of geomagnetic field magnitude in the ray-(optics) approximation were considered in [5] and the influence of directional fluctuations of an external magnetic field by the perturbation method in [6]. The influence of temporal fluctuations of both electron density and external magnetic field on scattered ordinary and extraordinary waves in turbulent collisional magnetized plasma has not been considered till now. The influence of temporal fluctuations of both electron density and external magnetic field on scattered ordinary and extraordinary waves in turbulent collisional magnetized plasma has not been considered till These fluctuations in absorptive medium can lead to the amplification of frequency of scattered radiation. Second order statistical moment-broadening of the spatial (angular) power spectrum (SPS) of scattered electromagnetic waves by turbulent magnetized plasma slab is obtained for arbitrary correlation functions of randomly varying plasma parameters.
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