N-second error for stratum 1 operation

Gary E. Miller gem at rellim.com
Mon Jan 6 18:10:19 UTC 2020

Yo Steven!

On Mon, 6 Jan 2020 08:55:12 -0600
Steven Sommars <stevesommarsntp at gmail.com> wrote:

> Has the ntpsec development community noticed similar initialization
> errors?

Yup.  When a GNSS receiver reboots, it may not have the current leap
second for some time.  So it falls back to a compiled in value.  But it
still reports that it has good system time.

The leap seconds was 3 less than today between 2009 and 2012.  So any
receiver reporting off by 3 seconds has fimrware compiled around those

NMEA 0183 has no message to report the leap second value in use, so
it is hard for gpsd, ntpd, etc. to know how san the receiver is.

The pool operators filter out these false tickers if the problem

Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
	gem at rellim.com  Tel:+1 541 382 8588

	    Veritas liberabit vos. -- Quid est veritas?
    "If you can't measure it, you can't improve it." - Lord Kelvin
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 851 bytes
Desc: OpenPGP digital signature
URL: <https://lists.ntpsec.org/pipermail/devel/attachments/20200106/01d1bee3/attachment.bin>

More information about the devel mailing list