Upgrading of UTC(CRL)

The problems in the current UTC(CRL) were solved. One problem was a large variation of frequency when a clock was withdrawn from the ensemble, which was caused by an inadequately predicted frequency of each cesium clock in the ensemble. We succeeded in solving this problem by changing the definition of the predicted frequency. Another problem was a variation in the daily-steering frequency of the UTC(CRL). We found that this problem was caused by a large variation in the measured time offset between the clocks. Improving the measured value was not easy, so we adopted a moderate adjustment and thereby succeeded in solving it. These solutions improved the frequency stability of the UTC(CRL).