[ntp:questions] GPS kit reverting to 1992 in April 2012?

Rick Jones rick.jones2 at hp.com
Sat Apr 21 17:34:34 UTC 2012

Terje Mathisen <"terje.mathisen at tmsw.no"> wrote:
> Rick Jones wrote:
> > I've heard some vague rumours about there being some bit of GPS kit
> > out there with a bug that causes it's idea of the time to revert to
> > 1992 once we get to April 2012.  Does anyone have (pointers to)
> > details?

> This sort of problem has happened once already, when the 10-bit week
> counter first wrapped around.

> 1024 weeks ~= 20 years

> But since all GPS vendors with firmware problems had to fix this at
> that time, I can't see any significant problems on the next wrap
> point.

> BTW, the last wraparound was on Aug 22 1999, so the next should not
> happen until 2019 or so!

I will try prodding my rumour sources for additional details.

rick jones
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