Mathematic modeling of statistical characteristics of Doppler frequency shift radio signal in nonstationary ionospheric channel

Authors: Ageeva E. T., Afanasiev N. T., Kim D. C., Mihaylov N. I.

Annotation: On the basis of the geometric-optics approximation, the method of small perturbations and numerically-analytical algorithm of calculation, the modeling of statistical Doppler characteristics of a decameter radio signal at single-hop propagation in the non-stationary ionospheric channel is carried out. The analysis of average dynamics and root-mean-square deviation of Doppler frequency shift radio signal have carried out when with time the size of quiet zone becomes equal to the length of jump between correspondents. It is shown, that the time dependences of statistical characteristics of the Doppler lower rays and Pedersen rays have qualitatively different behavior with a decrease in the critical frequency of the ionosphere and significantly depend on the length of the beam path and parameters of random inhomogeneities.

Keywords: doppler frequency shift, random ionospheric inhomogeneities, critical frequency, electron density, ionospheric radio channel