[58795] in North American Network Operators' Group
Non-GPS derived timing sources (was Re: NTp sources that work in a
daemon@ATHENA.MIT.EDU (Sean Donelan)
Sun Jun 1 08:20:22 2003
Date: Sun, 1 Jun 2003 08:18:45 -0400 (EDT)
From: Sean Donelan <sean@donelan.com>
To: nanog@merit.edu
In-Reply-To: <CMM.0.90.0.1054447277.roll@slaptoy.stupi.se>
Errors-To: owner-nanog-outgoing@merit.edu
On Sat, 31 May 2003, Peter Lothberg wrote:
> Time2.Stupi.SE and Time4.Stupi.SE are both stratum-1 accessable through
> the Internet, tracable to UTC-SP (part of TAI) without use of GPS or slaving
> to CDMA (that slaves to GPS).
I was wondering about everyone using GPS-derived timing sources last week.
I looked at 23 different American backbone providers and I think 19 were
traceable back to a GPS clock. 3 were traceable back to USNO/NIST NTP
servers on the Internet synched to their respective master clocks. And
one claimed to be using the ACTS dialup time service.
I don't expect GPS to spin out of control soon, but I did wonder how
hard it is to find a another reliable clock source of similar quality to
GPS to double check GPS. US clocks account for 40% of the input to TAI.
