refclock local with OCXO

Hi,

I am working on accurate timekeeping for a machine which would be 
difficult to get GPS signal to, and I want to ask a few questions about 
using an OCXO as a PPS source. As I understand it from the 
documentation, this should be possible by configuring a PPS refclock 
(for example on an i210) and then setting the `local` attribute.

However an OCXO is fundamentally different from the other refclocks as 
it will have a small frequency error in one direction causing the phase 
of the PPS signal to wander, whereas a GPSDO should always have the same 
phase relative to UTC. Before buying hardware I want to make sure: will 
chrony will measure and correct for the frequency error and long-term 
drift in the OCXO using connected NTP servers? If so, how will I monitor 
this frequency error to make sure the process is happening properly?

Thanks,
Stephanie.

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