We report all clocks in Sweden that are at the different labs to BIPM as "RISE
Clocks",,
we have common view carrier phase, two-way communications satellite and two different
fiber transfer methods Stupi-Rise and carrier-phase/fiber to all the remote nodes.
(In common view GPS, you don't actually use the time from the GPS satellite, just
the signal.)
Stupi has a active hydrogen maser (1.5x10e-15 in 10,000sec) to drive one time scale
generator/phaser/stepper and
a cold-rubidium-atom thing (1.x10e-15 in 3 weeks) drive the second time-scale.
----- Original Message -----
From: "Paul Koning" <paulkoning at
comcast.net>
To: "hecnet" <hecnet at Update.UU.SE>
Sent: Friday, November 26, 2021 2:43:30 PM
Subject: Re: [HECnet] A USNO GPS network time server is now in operation at Digital
Equipment Corporation, Palo Alto, CA
Don't you use GPS to do Cs clock verification? It
used to be people would
actually carry those clocks around to do that, but I thought that procedure is
obsolete now thanks to GPS. It doesn't need to be done often given 10^-13 or
so stability...
paul