2 ms·
Radio clocks [1] often don’t use GPS. Many countries have a radio signal they can pick up. In the continental US, it comes from Fort Collins, Colorado. [2] [1]
by skybrian 3y ago
Radio clocks [1] often don’t use GPS. Many countries have a radio signal they can pick up. In the continental US, it comes from Fort Collins, Colorado. [2]
[1] https://en.m.wikipedia.org/wiki/Radio_clock https://en.m.wikipedia.org/wiki/Radio_clock
[2] https://en.m.wikipedia.org/wiki/WWVB https://en.m.wikipedia.org/wiki/WWVB
- callalex 3y agoThat suffers from the same vulnerabilities.
- sneak 3y agoI have trouble picking up WWVB indoors at home even without jamming.
- pwagland 3y agoTo be fair, this isn't really _that_ accurate, it's only good to about 10ms, GPS will get you to 0.001ms accuracy, at least with the right kit.
- romaindivuolo 3y agoTechnically you can broadcast a new time to your neighborhood and have most people late to work (the ones having that kind of clock alarm), it's far from secure and accurate.