[ntp:questions] Start of new GPS 1024 week epoch

Harlan Stenn stenn at ntp.org
Wed Aug 14 21:07:31 UTC 2013


David Malone writes:
> Indeed - you need to have a timestamp within about ten years of
> correct before you start up, otherwise the problem will be worse.  Ntp
> has the same problem in figuring out the ntp epoch, though we've yet
> to see an ntp timestamp wrap around.

ntp-dev has a fix for this problem - while the original solution was
"make sure the clock is correct to within ~65 years' time" the new code
uses a "date of compile" value, and needs the system time to be either
10 years' before that date or up to 128 years' after that date.

See http://bugs.ntp.org/show_bug.cgi?id=1995 for more information
(thanks, Juergen!).

H


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