Yes, this is a good point. There is a pretty alternative to NTP and limiting the drift called radclock : http://www.cubinlab.ee.unimelb.edu.au/radclock/ http:/

Yes, this is a good point. There is a pretty alternative to NTP and limiting the drift called radclock : http://www.cubinlab.ee.unimelb.edu.au/radclock/ http://www.cubinlab.ee.unimelb.edu.au/radclock/ more information about the accuracy is available there : http://www.cubinlab.ee.unimelb.edu.au/radclock/performance.php http://www.cubinlab.ee.unimelb.edu.au/radclock/performance.p... When looking at it, I was a bit dubious until we made some tests at work and compared it with our current NTP using GPS IRIG-B receiver. Even for disconnect period longer than 48 hours, we had a small drift (around 200 nanoseconds) compared to traditional NTP. The only drawback is that you need a kernel path to make it works.