[time-nuts] Discipline an oscillator with NTP?

[Jason Rabel]

I was just thinking (dangerous I know)... Has anyone attempted to build a stand-alone oscillator that is disciplined via NTP?

i.e. NTP keeps it on-frequency... And I'm not talking about NTP that is locked to a local GPS, I'm curious about purely syncing to
other NTP servers over a network. (The presumption is that you have no access to GPS, WWVB, Cellular, or similar.)

Is it even possible or am I just day dreaming?