[ntp:questions] How to debug PPS?

Terje Mathisen "terje.mathisen at tmsw.no" at ntp.org
Fri May 7 05:45:26 UTC 2010

Hal Murray wrote:
>> GPGGA has one added benefit: If you turn on clockstats you get a log of
>> the current position every second, this is perfect input for a
>> statistical averaging of the current antenna position. :-)
> It doesn't have the date.
> GPRMC is the only one I know of with both time and date.

So you should really have GPRMC for the initial sync (and possible large 
jump), then GPGGA afterwards. :-)

Using the default max 1000 seconds offset, the date isn't really needed, 
except to sanity-check the current local date.


- <Terje.Mathisen at tmsw.no>
"almost all programming can be viewed as an exercise in caching"

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