Modelling and the analysis of rotational-oscillation movement of the deformable Earth
Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia
AbstractThe interpolation of pole's oscillation on an eight-year time interval and the two-year prediction are constructed by means of the basic mathematical model containing Chandler wobble, annual wobble and irregular slow drift (trend) of an average pole of the Earth on the basis of the measurements data of parameters of Earth's rotation by the least squares method . A Comparison of the theoretical curves (prediction) and the realized pole's movement was made on the basis of the data of the International Earth-Rotation Service (IERS). An extended model taking into account lunar perturbations is considered. On the period of beats is shown manifestations of high-frequency lunar wobbles with monthly and fortnight periods and possibility to interpolate these wobbles for a short time interval.