WARNING: The expressions below describe a prediction formulation that is not recommended for operational use. The expressions will continue to be provided in order to allow users to implement legacy procedures. Users are encouraged to explore the possibility of utilizing the tabular predictions available in the bulletin or in electronic data files available from the IERS Rapid Service/Prediction Center located at USNO. Because of the lower quality of this model, the prediction accuracy is a few mas to tens of mas worse than the published accuracy of the prediction model. x = 0.1195 - 0.1260 cos A - 0.0556 sin A + 0.0997 cos C - 0.0036 sin C y = 0.3681 - 0.0516 cos A + 0.1138 sin A - 0.0036 cos C - 0.0997 sin C UT1-UTC = 0.0409 + 0.00013 (MJD - 60720) - (UT2-UT1) where A = 2*pi*(MJD-60712)/365.25 and C = 2*pi*(MJD-60712)/435.