Mathematical Modeling of the Effect of Drift of Plasma Random Irregularities on the Spectral Line Width of an Ionospheric Sounder

摘要

We developed formalism for mathematical modeling of the effect of drift of chaotic irregularities of the electron number density on the spectral line width of a signal in the problem of sounding a randomly inhomogeneous plasma from the surface of a planet. We derived differential equations to calculate the mean and root-mean-square shifts of the reflected signal frequency, taking into account the asymmetry of the background plasma. We presented results of calculations of statistical moments of the frequency Doppler shift on an oblique radio wave trajectory. We showed the role of the spherical asymmetry of the deterministic and chaotic plasma components in the formation of the spectral line width of different signal modes.