The Features of The Angular Spectrum of Scattered Radiation by Turbulent Collisional Anisotropic Magnetized Plasma

Abstract

Statistical characteristics of the angular power spectrum of scattered radiation for power law spectrum of electron density ∞uctuations in turbulent collisional anisotropic magnetized plasma are considered. Investigation of phase ∞uctuations of radiowaves in the atmosphere is stimulated by development of interferometric methods of natural and artiflcial objects' observation. Measurements of correlation lengths of refraction coe-cient of the ionosphere using refractometer in both vertical and hori- zontal directions points out to anisotropy of inhomogeneities in the ionosphere. The irregularities have a variety of sizes and usually are elongated along the magnetic fleld direction. It has been found that small ( • 10km) F region irregularities are highly elongated along the direction of the magnetic fleld and large anisotropy could be also expected in case of certain types of plane waves propagating in the ionosphere. On the other hand, large irregularities (‚ 10km) may be only weakly anisotropic. Experimental observation of satellite signals shows that a power-law spectrum of ionospheric irregularities gives a better agreement to the data than Gaussian spectrum. The difierence between the power-law and Gaussian wavenumber spectra is signiflcant, since difierent scintillation spectral shapes give difierent scintillation levels and ∞uctuation rates. Statistical char- acteristics of the spatial spectrum of radiation scattered on anisotropic electron density ∞uctuations for anisotropic Gaussian correlation function have been investigated in (1,2). The present paper reports the results of analysis of the angular power spectrum for power law spectrum of electron density ∞uctuations in the F region of the ionosphere.