Is there some (inexpensive) GPSDO that has a "time from power on in an
unknown location to reasonably stable" in the <5 minute category?
Frequency accuracy in the 1E-9 range would be fine.
A regular old GPS has a Time to First Fix well under that, and it should
be cranking out 1pps pulses with 1E-7 or 1E-8 precision pretty
quickly.. Would it be fair to say that after 100 seconds, one could
theoretically have driven that down another factor of 10?
As I understand it, a thunderbolt needs some number of hours after turn
on to stabilize, but just how bad is it after, say, 5 minutes.
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