[time-nuts] leapsecond on long-, medium- and shortwave

Pieter-Tjerk de Boer ptdeboer at cs.utwente.nl
Thu Jan 1 18:22:54 EST 2009

During the leap second, I recorded 6 parts of the radio spectrum,
containing a few time and frequency stations, and a lot of AM
broadcast stations.
An analysis of these recordings is now here:

Out of 33 long- and mediumwave broadcasters that transmitted some
sort of time signal (e.g., a few 1 kHz beeps near the top of the
hour), only 17 got the leap second right.
In fact, it turned out that several of the signals are not just off
by the leapsecond, but by several seconds more.
Also, many are off by a fraction of a second, presumably due to delays
between the studio and the transmitter, e.g. via a satellite link.


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