[ntp:questions] Sine wave offset patterns

David Taylor david-taylor at blueyonder.co.uk.invalid
Tue Sep 10 05:02:45 UTC 2013

On 09/09/2013 23:10, E-Mail Sent to this address will be added to the 
BlackLists wrote:
> Jared Watkins wrote:
>> ...
>> In pretty much all cases though when graphing the offsets
>>    I'm seeing sine wave patterns.
>>   The period is usually about 10 hours and the amplitude
>>    can vary by +-25ms for the 'closer' ones and as much
>>     as +-100ms for the more distant ones.
>> ...
>> Any ideas on what would cause it?
> Temperature?

Plotting with MRTG might show that - I can see peaks in the Winter when 
the heating turns on in the morning.

Web: http://www.satsignal.eu

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