THE INFLUENCE OF TIDAL WAVE Mf ON THE HIGH-FREQUENCY COMPONENT OF VARIATIONS IN THE EARTH ROTATION PARAMETERS

Abstract

The paper analyzes the variation in the parameters of the tidal lunar declination wave M_f in the variation of the Earth rotation angle (UT1–UTC time series). The source data was bulletin EOP14C04 of the International Earthʼs Rotation and Reference Systems (IERS), which contains data on the parameters of the Earth rotation (ER) from 1962 to the present in one-day increments. It is shown that all periodic components of the variation of the M_f parameters, where the main one is the orbital period of the lunar nodes with a period of 18.6 years, completely coincide with the corresponding parameters of the M_f wave for the deformation tide, isolated from the total tide obtained using the standard ETGTAB package. Shown, as an example, is the forecast for the development of the M_f wave of the Earth rotation until 2035.