传统的原子钟频率预报方法基于国际权度局BIPM每月公布的原子钟频率,具有较长的滞后性,且由于原子钟受多种噪声的影响,无法较准确地对原子钟频率进行近实时的预报.本文根据BIPM官方公布的快速协调世界时UTCr数据,提出基于UTCr的原子钟频率动态预测方法.采用参与国际时间比对的3个守时实验室,即日本国家计量院NICT、中国科学院国家授时中心NTSC和中国国家计量研究院NIM的钟比对数据,应用本文提出的频率预报方法和传统的频率预报方法分别进行原子时尺度计算.将参考原子时计算结果TA'(k)－UTC(k)分别与UTC－UTC(k)进行比较,结果表明本文方法优于传统频率预报方法,提高了原子钟频率预测 的近实时性,为频率驾驭提供了更加近实时可靠的参考,有助于获得更稳定和更准确的UTC(k).
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).
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