NMEA sentences; other GNSS

[Gary E. Miller]

Yo Paul!

No other questions?  Not all agree with my comments below.

On Fri, 14 Jun 2019 16:41:07 -0700
Paul Theodoropoulos <paul at anastrophe.com> wrote:

> Thanks Gary. I went back and forth on gpsd-users and ntpsec-users,
> since this was specific to time service, I went with the latter - but
> either could have worked I guess!
> 
> On 6/14/2019 16:36 PM, Gary E. Miller wrote:
> > Yo Paul!
> >
> > Maybe best asked one gpsd-users at nongnu.org?
> >
> >
> > On Fri, 14 Jun 2019 16:24:49 -0700
> > Paul Theodoropoulos <paul at anastrophe.com> wrote:
> >  
> >> Two quickie questions, as I've read an assortment of conflicting
> >> things on our old friend the Internet:  
> > Hehehe.
> >  
> >> 1. What are the minimum/desireable NMEA sentences for a GPS
> >> receiver to send gpsd for timeservice?  
> > Minimum:
> >
> > $GPZDA for the year.
> > $GPRMC for the date and time.
> >
> > gpsd when asked, will set u-blox to:
> >
> > $GPGBS
> > $GPGGA
> > $GPGSA
> > $GPGST
> > $GPGSV
> > $GPRMC
> > $GPVTG
> > $GPZDA
> >
> >  
> >> 2. On the ublox neo-M8T, it supports GNSS:
> >>
> >> GPS
> >> SBAS
> >> Galileo
> >> BeiDou
> >> IMES
> >> QZSS
> >> GLONASS  
> > Tests show that just GPS is usually best for the PPS.  YMMV.  Easy
> > to test. 
> >> I know that IMES and QZSS are specific to Japan, so definitely not
> >> needed  
> > IMES is indoor "GPS".  Do not use that!
> >  
> >> Is there any value in having anything other than just GPS enabled,
> >> for a stationary timeserver? Does SBAS help at all?  
> > SBAS corrections help, but raning from SBAS hurts.
> >
> > 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
> >
> > _______________________________________________
> > users mailing list
> > users at ntpsec.org
> > http://lists.ntpsec.org/mailman/listinfo/users  
> 




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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