[time-nuts] Different Thunderbolt versions

Tom Van Baak tvb at LeapSecond.com
Sun Feb 22 01:05:59 UTC 2009

> For observations at 1420MHz, and short integration times (~ 100sec) the
> phase error needs to be 100ps or less.
> For longer integration times (10,000 sec is desirable) and higher
> frequencies the timing constraints are far more stringent.
> Whilst clock modeling can be used to improve performance it can only
> correct systematic effects.


Approximately what range of tau and ADEV(tau) would this
VLBI requirement correspond to? A couple of the TBolts I've
tested are at or just under 1e-12 at 1 second and stay almost
flat out to 100 or even 1000 seconds.


More information about the time-nuts mailing list