Calculation of the duirnal and sub-diurnal variations of EOP from results of VLBI global solution

Kurdubov S. L., Mironova S. M., Pavlov D. A.

Известия ГАО в Пулкове, № 225: Труды Всероссийской астрометрической конференции «Пулково-2018», Санкт-Петербург, 79–84 (2018)

Abstract

We processed almost all available VLBI data in order to improve coefficients of the model of the diurnal and sub-diurnal EOP variations. Amplitudes of the EOP variations were computed by global solution including 5677 VLBI series. We derived that all tidal constituents from Eanes (2000) model can't be calculated on current set of VLBI observations. 8 main constituents were calculated using Eanes (2000) model. Estimated coefficients of the constituent K2 derived by adding to zero and Eanes (2000) are different, which could be a reason to choose another set of estimated constituents. Eanes (2000) and estimated amplitudes were used for Very Long Baseline Radio Interferometry (VLBI) and Lunar Laser Ranging (LLR) data processing. It was shown that the new model slightly improves the VLBI and LLR data representation.