[ntp:questions] Garmin LVC 18x jitter problem

Dan Drown dan-ntp at drown.org
Thu Jul 11 16:04:58 UTC 2019

Quoting David Taylor <david-taylor at blueyonder.co.uk.invalid>:
> I'm not an expert in this, but the timing seems to be the same in  
> both graphs, the problem occurring around 8000.  Could that be due  
> to someone with a GPS jammer parking nearby?

To expand on this: what were your GPS satellite signal strengths like  
during this time period ($..GSV messages)?

Did the GPS report anything different in terms of lock status ($..GSA  

Did the system transition to another time source before or after this point?

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