基于导航卫星授时长期稳定度高的特点,结合铷原子钟优良的短期稳定度和低漂移率特性,提出了一种高精度授时技术。以导航接收机1 PPS为基准对铷原子钟进行驯服,通过高精度时差测量、卡尔曼滤波、增量式PID算法3个关键技术对外提供高精度授时服务。验证结果表明,输出1 PPS相位稳定性达到±0.2 ns以内,驯服期间1 s稳定度达到3.76E^-12。

Based on the long-term stability of navigation satellite timing,combined with the excellent short-term stability and low drift rate of rubidium atomic clock,a high-precision timing technology is proposed.It tames the rubidium atomic clock based on 1 PPS of navigation receiver to provide high-precision timing service through three key technologies:precise clock difference measurement,Kalman filtering,and incremental PID algorithm.The verification results show that the phase stability of the output 1 PPS reaches within ±0.2 ns,the stability reaches 3.76E^-12 at 1 s during taming.