[time-nuts] I've been thinking about a GPS receiver experiment
holrum at hotmail.com
Thu Oct 26 23:00:30 UTC 2017
The Thunderbolt, Star-4, Trueposition, and HP GPSDOs/Smartclocks are all known to do this. Typically the learning period is around 24 hours before the compensation is allowed to run. My HP GPSDO seems to take a week for best performance.
Separating tempco and aging drift seems to me to be a rather thorny problem to do well.
> I never measured the temperature of oscillators and used the
information to compensate holdover but it makes sense with a
specific oscillator and enough run time to collect the data
to categorize the oscillator for temperature and ageing.
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