"Richard B. Gilbert" <[email protected]> wrote in message
news:[email protected]...
[]
The best source of time IMHO is a GPS Timing Receiver. Note that GPS
Receivers can also be designed for navigation. For timing service you
should take care to get a receiver designed for the purpose! Either
kind necessarily knows what time it is but a receiver designed for
Navigation is concerned with latitude, longitude, and elevation and
delivering this information. Delivering accurate time is its lowest
priority.
There is one low-cost GPS receiver board available from China, and its use
with NTP is described here:
http://www.satsignal.eu/ntp/Sure-GPS.htm
Many others are available, of course, such as the Garmin GPS 18x LVC.
Cheers,
David
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