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by hansor 1749 days ago
Or you could just have your own atomic clock. It is not uncommon, and not complicated as you might think[1].

Other methods for obtaining times are:

- GPS: Satellite receiver for the Global Positioning System

- GNS: Combined GPS/GLONASS/Galileo/BeiDou satellite receiver (L1 frequency band), can also be used for mobile applications

- GNS-UC: GPS and Galileo Satellite Receiver with Up Converter for Meinberg GPS Antenna/Converter

- PZF: DCF77 correlation receiver for middle europe

- MSF: Long wave receiver for Great Britain

- WWVB: Long wave receiver for the US time signal

- TCR: Time code receiver for IRIG A/B, AFNOR or IEEE1344 codes

- MRS: (GPS, PPS, 10MHz, NTP): Multi Reference Source - several reference source

[1]: https://www.muquans.com/