Statistical relation of traveling ionospheric disturbances with neutral wind and disturbances in the stratosphere

Using the representative statistics on trav-eling ionospheric disturbances (TIDs) obtained by Ye-katerinburg and Magadan radars, we have shown that distributions of TIDs and average TID velocities by azimuths and local time agree well with the hypothesis on internal gravity wave (IGW) filtering by the neutral wind. We have examined the influence of significant winter sudden stratospheric warmings on IGW in the ionosphere. A method has been proposed for estimating zonal and meridional neutral wind velocities from MSTID parameters. The method is universal and allows us to estimate the zonal and meridional neutral wind velocities from the statistics on MSTID 2D phase veloc-ity vector obtained by any tool. There is a large amount of data from which MSTID 2D phase velocity vector (as opposed to the 3D phase velocity vector) can be de-rived, including maps of TEC disturbances and all-sky camera images. This method may therefore be useful in developing and improving neutral wind models.