Reply to post: Re: Interesting

Register Lecture: Can portable atomic clocks end UK dependence on GNSS?


Re: Interesting

"This is the key -- how much precision does your application really need ? I doubt that many need more precise than 1 ms."

Light travels at about 1 foot per nanosecond/1 meter per 3.34 ns, so if you wish to compute your location to the nearest foot/meter, that's how accurate your time needs to be.

Traditional GPS gives you your location to within 10m at a resolution of 40ns but I believe gains a little from multiple sources. 1ms gives you your location to the nearest 250 meters if my math is correct (probably not...)

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