[Top][All Lists]

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

Re: gpsd g10de777bb vs Jackson Labs Micro JLT

From: Gary E. Miller
Subject: Re: gpsd g10de777bb vs Jackson Labs Micro JLT
Date: Tue, 17 Aug 2021 10:58:57 -0700

Yo Greg!

On Tue, 17 Aug 2021 08:04:13 -0400
Greg Troxel <> wrote:

> "Daniel O'Connor" <> writes:
> > I don't have the spec either but FWIW the ublox docs talk about such
> > numbers if it's in a particular mode.  
> Two comments on NMEA specs:
>   They are not secret, merely copyrighted, so they are available in
> the open standards sense, just not in practice accesible to people
> without a lot of spare money.   It would be useful if someone on the
> list has access to it perhaps via a university or corporate library
> who could comment on what it says.

Been on the gpsd wishlist for over 10 years.

>   I find that the u-blox F9P spec gives information on what that
>   receiver outputs, including talking about varying NMEA versions.  So
>   it seems also like an NMEA spec, in a not-100%-reliable sort of way.

Yes, good, but not 100% reliable.

> My impression at the moment is that there are micro versions of NMEA
> slightly different as the world struggles to move from 2
> constellations (GPS/GLONASS + SBAS) to more.   The F9P section on
> this seems very useful.

At least 10.  So to preoperly decode you need to know the NMEA version.
gpsd has to guess the version from the NMEA.

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: pgpXRQzRcuWaP.pgp
Description: OpenPGP digital signature

reply via email to

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