Abstract: Stable and reliable time reference is the premise of launching time code measurement.The use environment of the time system equipment is complex,it is inconvenient to disassemble,therefore,in the field calibration of the time system equipment,it is not possible to directly obtain the stable and reliable time reference.This paper proposes an idea,designs a time code online calibration system based on real-time satellite common view technology.This system adopts portable design and real-time online data processing technology,restoring the standard time of the time-keeping laboratory at the calibration site,which can be widely used in the field of time parameters on-site calibration.

Key words: Real-time satellite common view, Time code measurement, Online calibration