Harmonic analysis of the earth`s surface points` horizontal movements in the ITRF

Abstract

The latest implementation of the international global coordinate system ITRF2020 enables taking into account not only linear time parameters of points’ coordinates changes participating in its construction, but also periodic terms reflecting their seasonal (intra-annual) variation, as well as post-seismic effects in tectonically active areas. These shifts for control points are not only caused by the actual physical movement of the point itself relative to neighboring ones or together with them on the tectonic plate. It also includes the influence of joint processing