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

[Gary E. Miller]

Yo John!

On Thu, 3 Sep 2020 15:21:34 -0400
John Ackermann N8UR <jra@febo.com> 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.

Nice.

> 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:

    'GPS-Antenna_AppNote_(GPS-X-08014).pdf'

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
        gem@rellim.com  Tel:+1 541 382 8588

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    "If you can't measure it, you can't improve it." - Lord Kelvin

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