Pivoting

[Gary E. Miller]

Yo Eric!

On Tue, 25 Apr 2017 19:48:25 -0400
"Eric S. Raymond" <esr at thyrsus.com> wrote:

> Gary E. Miller via devel <devel at ntpsec.org>:
> > On Tue, 25 Apr 2017 16:32:17 -0700
> > Hal Murray <hmurray at megapathdsl.net> wrote:
> >   
> > > So the answer is simple.  Not yet.  All GPS receivers still have
> > > roll over problems.  
> > 
> > Not so simple.  If your GPS picks up GLONASS, Beidou, Galileo, etc.
> > then it will not have the gps week rollover problem.  
> 
> Do they not use the same wek/second representation?

No.  GPS uses 10 bit weeks on the L1 C/A channel, which is what
most consumer GPS use.  The other systems use 13 bit weeks.

>  What's the
> length of the era in those systems.  Has to be finite...

13 bits of weeks.  8191 weeks.  157 years.

RGDS
GARY
---------------------------------------------------------------------------
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
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