Very accurate reference frequencies can be obtained by syncing an oscillator to a GPS receiver clock output (0). I'm however all for maintaining traditional sho

Very accurate reference frequencies can be obtained by syncing an oscillator to a GPS receiver clock output (0). I'm however all for maintaining traditional shortwave (not just time and frequency) radio stations on, for being much easier to receive and harder to control by governments. 0: https://en.wikipedia.org/wiki/GPS_disciplined_oscillator https://en.wikipedia.org/wiki/GPS_disciplined_oscillator