Stratum one autonomy and assumptions about GPS

Gary E. Miller gem at
Tue Aug 30 03:49:17 UTC 2016

Yo Achim!

On Thu, 25 Aug 2016 20:33:36 +0200
Achim Gratz <Stromeko at> wrote:

> Dan Drown writes:
> > The GPS module I'm using still outputs PPS even when it loses lock.
> > That won't be true for every GPS module.  
> I also have a NavSpark mini attached at the moment and I was surprised
> it kept outputting the PPS when losing 3D lock (it stops blinking the
> LED).

Most cheaper GPS always output PPS, even when they have no idea
where they are or what time it is.  Garmin documents this, as do others.

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