A Portable High-Precision Self-Calibration Time-Service System

This paper mainly concerned with the design of a portable high-precision self-calibration time-service system, to solve the problem that the common time-service methods, which rely on the external time bases, cannot work when external signals are shielded. When the external frequency sources, such as satellites, networks and radios, are not available, this system can also provide us with a high-precision relative time-service, whose self-calibration time is less than 10min and daily time deviation is less than 10us. Different types of interface can also been offered for various users and devices.