Network Time Protocol

I run my own stratum 1 time server, using the radio clocks below a GPS receiver as a reference source.

Radio Clocks

I've built my own MSF and DCF77 radio clocks using instructions from Jonathan Buzzard's Simple Radio Clock for PCs guide.

A box connected to the serial port provides input/output for all devices with a pass-through USB connector to power the GPS.

Time Signals

DCF77

The first radio clock receiver I set up, on August 29th 2004.

Location
Mainflingen, Hesse, Germany (50°01'N 9°00'E)
Power
50kW
Frequency
77.5KHz

MSF

The second radio clock receiver I set up, on March 4th 2005.

Location
Anthorn, Cumbria, England (54°54.6'N 3°16.8'W)
Power
50kW
Frequency
60KHz

GPS

I bought a Garmin GPS 18 and it's been running since October 20th 2007.

Output
NMEA 2.30
Accuracy
1Hz pulse to 1µs

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Last modified 2014-07-14T20:20:42+01:00.
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