> As long as a timeserver has a GPS lock, it's going to be disciplining the atomic clock the same way any other clock is disciplined
Not true, you need a GPS lock as well as PPS.
Are you sure about 50ns?
Not true, you need a GPS lock as well as PPS.
Are you sure about 50ns?
Pretty sure about 50ns. Datasheet for the Trimble Thunderbolt E: http://trl.trimble.com/docushare/dsweb/Get/Document-383329/0... ...second page, "PPS accuracy: 15ns (one sigma)" (I picked a larger number than the spec sheet simply so that hopefully nobody would go "oh, that's the ONE SIGMA value, lets argue".)
My Thunderbolt, in a completely temperature-uncontrolled environment with ~20 degree daily swings, generally has a PPS accuracy of ±45ns, in what is pretty crap conditions (first rule of precision timekeeping is "temperature stability")