ePRTC (Precision Reference time clock)

An ePRTC is an autonomous source of time that uses one or two co-located atomic clocks to provide the required performance for both time and frequency, even when connection to GNSS is lost. Key attributes of an ePRTC include the following:
•The ePRTC supports a high level of accuracy (Accurate to within 30 ns or better when verified against the applicable primary time standard, such as UTC) and is subject to more stringent output performance requirements when compared to today’s PRTC systems.
• An ePRTC is an autonomous source of time that uses one or two co-located atomic clocks to provide therequired performance for both time and frequency, even when connection to GNSS is lost.
• An ePRTC delivers a higher level of operational reliability to ensure operators can maintain required time and frequency service performance for long periods regardless of the availability of GNSS.