The precision of the universal time UT1 forecast for the short time intervals(up to two months)is researched in this paper based on the celestial mechanical model of the Earth axial rotation irregularity.It is shown that use of the approximate low-parametric model for the problem of the Earth axial rotation velocity variation forecast on the short time intervals is justified.The approximate model is obtained by the averaging of the variable parameters that is exposed to small variations in consequence of perturbation factors nonstationarity.The method of weight coefficients distribution in approximation algorithm that takes into account the irregular oscillations of the Earth axial rotation velocity is suggested.The precision of the forecast that is identical to published by IERS one is achieved with the help of weighted least squares method.
展开▼
