Structure and evolution of internal gravity waves and traveling ionospheric disturbances in regions with sharp gradients of the ionospheric parameters

[1] The dynamics of the solitary nonlinear internal gravity waves ( IGW), as well as traveling ionospheric disturbances (TID) of the electron density excited by IGW at the heights of the ionosphere's F region, for conditions close to those of the F layer assuming that the source of initial perturbation has the pulse character are studied. In particular, the cases when the solitary IGW and TID propagate in the regions with sharp gradients of the ionospheric parameters, such as electron density, temperature, scale heights for the ions and neutral particles, etc., are considered.