[LEAPSECS] happy anniversary pips
seaman at noao.edu
Wed Feb 5 19:14:15 EST 2014
I could have sworn that was Nye v Ham, not the State of the Union…
On Feb 5, 2014, at 4:50 PM, Richard Clark <rclark at noao.edu> wrote:
> I'm surprised that someone on the list hasn't already pointed this out.
> Today February 5 2014 (already yesterday in much of the world) marks
> the 90th anniversary of the BBC's time pips as we know them.
> I had been thinking about broadcast time signals recently. Here in the
> USA we just experienced another State of the Union address. The most
> interesting part of this event is the opportunity to compare the same
> programming stream going out simultaneously on numerous tv channels and
> radio stations. I found variation in lag between various sources of 10
> seconds or more. The 'earliest' source seemed to be a local NPR station,
> although I did not include the off-the-air signals from local tv stations.
> I got those from Direct TV.
> Digital buffering and decoding delays seem to be more randum than the
> distribution of leap seconds.
> Richard Clark
> rclark at noao.edu
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