Loran-C UTC timing Synchronization System
This system is to synchronize the transmitted signals of the Pohang and Gwangju transmitting stations belonging to the Loran-C international cooperation chain to Universal Coordinated Time (UTC), by using GNSS (Global Navigation Satellite System).
This system generates a reference time using the Holdover function when GNSS signals are unavailable due to GNSS interference, etc.
Function
Time Synchronization
- UTC Synchronized Reference Time Generation
- Measuring and controlling visual error in reference time generation systems
- Time comparison with UTC KRISS using Common View
- Holdover function using cesium atomic clock
Signal Measurement
- Quality measurement based on SAE9990 standard
- Measuring Transmission Signal Quality(ECD, SNR, Droop, PKI, PKP, Occupied Bandwidth, etc.)
TOT Control
- TOT control for UTC time synchronization of transmission signal
Control & Monitoring
- Blink detection and status information provision
- Status monitoring function through GU
- Remote control and monitoring function
- Log data storage and inquiry function
Dual system structure
- Uninterruptible systems with dual system structure
SZC detection
Specs
| Performance | |
| Timing synchronization performance | < 50ns to UTC @GNSS Locked < 50ns(rms) for 14 days @GNSS Unlocked (Holdover) |
| GNSS CV Timing comparison performance | < 10ns for 1 day |
| Loran-C signal SZC detection resolution | <2ns |
| TOT control performance | < 10ns |
| Input Signal | GNSS signal, Loran-C Feedback signal |
| Output Signal | 5MHz Sinewave |
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