Investigation of Seasonal Features of the Characteristics of Medium-Scale TIDs in the Asian Region of Russia

The results of a study of the characteristics of medium-scale travelling ionospheric disturbances (MS TID) using ionograms of oblique incidence sounding (OIS) of the ionosphere on single-skip radio paths in the Asian region of Russia are presented. The features of the diurnal dependence of the probability of registration of the MS TID on the ionograms of the OIS for different seasons, conditions of geomagnetic disturbance and the level of solar activity are revealed. A comparison of the characteristics of the MS TID, manifested in the form of Z-type formations on perturbed ionograms of OIS, with the dynamic characteristics of the neutral atmosphere in the region of reflection of the OIS signals is made.