[time-nuts] Synchronizing to WWV

Tom Van Baak tvb at LeapSecond.com
Sun Dec 20 12:34:22 UTC 2009


> When did WWV start sending the data on 100 Hz?
> 
> I was playing with a WWV simulator the other day, and was surprised to hear 
> it.
> 
> I remember listening to WWV when I was a kid.  That was back in the '50s.  I 
> don't remember hearing the 100 Hz blips.  Of course, I could have been using 
> gear that didn't have much of a response at 100 Hz.

Hal,

Your ears are correct; the 100 Hz code began in 1960. See:
http://tf.boulder.nist.gov/general/pdf/1670.pdf
http://tf.boulder.nist.gov/general/pdf/1681.pdf
http://tf.nist.gov/stations/wwvhistory.htm
http://tf.boulder.nist.gov/general/pdf/1731.pdf

/tvb




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