On 2014-03-19 16:32, Paul wrote:
On Wed, Mar 19, 2014 at 6:16 PM, Brian Inglis <
[email protected]> wrote:
Each constellation has its own epoch, TAI or UTC time scale, and
uncertainty:
I'm unclear how various time scales relate to PTP. It would appear that
the design intent is local (LAN) process control. And while that might
subsume diverse goals time transfer between national labs (even on the same
continent) seems out of scope.
But perhaps the OP has such interests.
The PTP timescale is TAI and the GM broadcasts the UTC offset.
The examples given show the limits of accuracy and precision
achievable using national standards.
While 1ns precision may be doable, accuracy depends on what
controls the GM, and its traceability to a reference.
--
Take care. Thanks, Brian Inglis
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