[Top][All Lists]

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

Re: moving to 8 digits of lat/lon (gpxlogger, maybe elsewhere)?

From: Gary E. Miller
Subject: Re: moving to 8 digits of lat/lon (gpxlogger, maybe elsewhere)?
Date: Thu, 3 Sep 2020 12:29:59 -0700

Yo John!

On Thu, 3 Sep 2020 15:21:34 -0400
John Ackermann N8UR <> wrote:

> FWIW, a couple of days ago I took an F9P with the Lefebure NTRIP
> caster software and the Ohio DOT VRS network out into the field to
> spot a bunch of antenna tower locations.  Data captures of around 80
> - 120 seconds show CEP(95%) of a few millimeters when there's an RTK
> FIX solution.


> I'm using the u-blox ANN-MB-00-00 dual-freq mag mount antenna, which 
> seems a bit touchy.  It absolutely wants a ground plane (I'm using a 
> metal pie tin) and the solution often dropped to float when there
> were sky obstructions.

Uh, wait a minute.  If the pie tin is > 50mm it is not doing what you
think it is doing.  See Section 5 of this u-blox doc:


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: pgpQzOl9lEuNX.pgp
Description: OpenPGP digital signature

reply via email to

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