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groggo
on Jan 19, 2022
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GPS
How are receivers sensitive enough for this to work? A GPS watch can tell the difference between a few billionths of a second?
> It only takes light one billionth of a second to travel the distance of around 1 foot.
zarzavat
on Jan 19, 2022
[–]
1 billionth of a second is an age in the world of radio signal processing. That's 1 GHz. Wifi goes up to 6GHz. 5G gets up to ~30GHz!
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> It only takes light one billionth of a second to travel the distance of around 1 foot.