[ntp:questions] Leap second quirk

Harald Brinkmann hb7267 at gmx.de
Fri Oct 31 22:44:27 UTC 2008


Hal Murray wrote:

> Two of my systems injected leap seconds at the end of Aug and Sep.
> A couple of others didn't.
> 
> I thought I saw some discussion of this, but I can't find it.

In August what seems to be a bug in SIRF chipset GPS receivers was discussed
here. Look for "UTC Time from NMEA receiver one second behind DCF". This
link http://www.megapathdsl.net/~hmurray/ntp/leap-gps3.gif shows the
intermittent one second lag. It seems ntp is innocent since the wrong data
is already in the NMEA data sent by the GPS receiver.

Hope this helps.

Harald




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