Abstract: The traditional method of atomic clock frequency prediction is based on the clock frequency, which is published by BIPM monthly. It has the characteristic of hysteresis. Because of the influence of different kinds of noise on the atomic clocks, it is difficult to predict accurately atomic clock frequency. A dynamic prediction model for atomic clock frequency is proposed based on a rapid Coordinated Universal Time (UTCr) published by BIPM. The new method and the traditional method are applied to calculate the atomic time scales with the real data of NICT, NTSC, and NIM. The time scales calculated by the different methods, are compared with UTC-UTC(k), respectively. The results show that the new method is superior the traditional one. The new method greatly improves the quasi-real time of frequency prediction, provides more quasi-real time and reliable reference for frequency steering, and enhanes stability and accuracy of UTC(k).

Key words: UTCr, frequency prediction, time scale