DAR-6200RM-S
MF R-Mode System
This system is a terrestrial backup navigation system for PNT (Position, Navigation, Time) services required for ship operation and berthing in the event of GPS interference and hacking.
It is a terrestrial navigation technology that transmits a signal that combines an MSK signal and two CW signals at a frequency of 300 kHz, and is one of the alternative navigation systems that stably provides PNT services.
Function
UTC Timing Synchronization System
- Generating a reference timing(1PPS, IRIG-B, 10MHz) synchronized to UTC
- Timing error measurement and control of the reference timing generation system
- Timing comparison between transmitters using Common View(CV)
- Holdover using cesium atomic clock
MF R-Mode Exciter
- MF R-Mode signal generation
- MSK signal modulation and demodulation
- CW1/2 signal generation
- TOT control(Auto/Manual)
Transmitter Control Unit
- Control & Monitoring Transmitter system : output path, switching mode (Auto, Manual) and output On/Off
- Transmitter remote control
Specs
| Performance | |
| Timing synchronization performance between MF R-mode transmitters | <10ns @GNSS Locked <20ns(rms) for 15 days @GNSS Unlocked |
| R-Mode signal generating | satisfied MF R-Mode Modulator Spec. |
| DGPS MSK modulation/demodulation | satisfied ITU R. M-823-3 standard |
| RTCM demodulation | satisfied RTCM SC-104 standard |
| TOT control performance | <±5ns |
| Input signal | GNSS Signal, RTCM Data, MF R-Mode Feedback Signal |
| Output Signal | MF R-Mode Signal |
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