[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: how to forward RTCM data to gpsd?

From: Gary E. Miller
Subject: Re: how to forward RTCM data to gpsd?
Date: Sat, 12 Dec 2020 12:51:50 -0800

Yo Greg!

On Sat, 12 Dec 2020 15:35:30 -0500
Greg Troxel <> wrote:

> > I get QZSS in Oregon.  gpsd has usrs that get NavIC.  
> Interesting that you hear QZSS.  And of course people near India will
> get NavIC.
> There are no people in Massachusetts that can get either; the
> reference network doesn't hear them and doesn't send it.  That's all
> I meant: my local reference network does the 4 global systems.

So move?  :-)

> >> and also using corrections that arrived via SBAS.  
> >
> > Which are just RTCM2.  
> Sure: pseudorange errors and pseudorange error rates (and t_0).  Like
> all "differential", as opposed to carrier phase approaches.

RTCM 3 provides carrier phase differentials.  That is the big eason it works
better than RTCM 2.

> > My tests on u-blox 9 show otherwise.  Feel free to send us your test
> > results.  
> Presuambly you updated firmware to to get SBAS; the older firmeware
> doesn't do that.

Uh, oh.  I see FPG 1.13 came out in May.  Time to update.  And the changed
their NMEA again...

> That's dual frequency, another wrinkle, so the uncorrected solutions
> are much improved.  Agreed this is all non-obvious.

Of course.

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

            Veritas liberabit vos. -- Quid est veritas?
    "If you can't measure it, you can't improve it." - Lord Kelvin

Attachment: pgpajpwDo5mN1.pgp
Description: OpenPGP digital signature

reply via email to

[Prev in Thread] Current Thread [Next in Thread]