[time-nuts] How did they distribute time in the old days?

Howard Davidson hld42 at att.net
Wed Oct 14 02:18:09 EDT 2015


On 10/13/2015 10:12 PM, Hal Murray wrote:
> holrum at hotmail.com said:
>> Somewhat time-nut related...  the project main application needed
>> millisecond consistent (not necessarily accurate) time stamps on a
>> world-wide network.  That was in the pre-gps, pre-fiber, pre-historic
>> before-times.  I don't think that they ever quite got there.
> World wide seismology took off in the early 1970s as background for nuclear
> underground non-testing treaties.  Both the US and the USSR had to be sure
> they could detect the opponents tests and distinguish tests from earthquakes.
>   We had seismic stations scattered around the globe.
> Does anybody know how they distributed time back then and/or how accurately
> they could do it?
> Google says the speed of sound in rock is 6-8 km/s so 10 ms error would be
> 100 meters.  That seems like a reasonable ballpark.

Howard L. Davidson
hld42 at att.net

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