Shutdown of servers at JILA/University of Colorado due to failed atomic clock

[jeff.s...@nist.gov]

Dear colleagues,

Recently the atomic clock housed at JILA/University of Colorado failed with a hardware error code, causing the time servers there to lose synchronization with UTC(NIST). We cannot immediately replace or repair the clock so the affected time server systems have been powered off:

utcnist.colorado.edu (128.138.140.44)
utcnist2.colorado.edu (128.138.141.172)
utcnist3.colorado.edu (128.138.140.211)
ntp-c.colorado.edu (128.138.141.177), serving authenticated NTP
ut1-time.colorado.edu (128.138.140.50), serving time in the UT1 astronomical time scale

Due to caching in DNS, the load balancing domain name time.nist.gov may still resolve to these systems for some clients for a short while. For your planning purposes, the known status of all NIST systems is updated (manually) at:

https://tf.nist.gov/tf-cgi/servers.cgi

Best wishes,

-Jeff Sherman

project email: internet-t...@nist.gov