[LEAPSECS] happy anniversary pips

Rob Seaman 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

More information about the LEAPSECS mailing list