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Re: my total miserable failed experiment with PPP and rtklib
From: |
Gary E. Miller |
Subject: |
Re: my total miserable failed experiment with PPP and rtklib |
Date: |
Tue, 25 Jul 2023 11:44:34 -0700 |
Yo Hans!
On Tue, 25 Jul 2023 20:29:32 +0200
Hans Mayer <gpsd@ma.yer.at> wrote:
> > Missing from your discussion was a mention of datum. GPS itself
> > will give positions in WGS84(G2139) at least this week. But as
> > soon as you use SBAS you get positions in the SBAS reference frame.
> > If you are in .at, vs just using a .at email address, that is
> > likly EGNOS and thus probably some ITRF2008 or ITRF2014 -- but do
> > look it up and tell us.
>
> This I have to verify. But SBAS was switched on.
SBAS, for older GPS, just makes startup faster. It adds no accuracy.
It also has some air traffic functions.
> Are there recommended online tools to recalculate from WGS84 date ?
Look at geographiclib. More conversions than you can ever deal with.
https://geographiclib.sourceforge.io/
> > is it a geodetic-grade antenna
>
> no idea.
The u-blox one is not.
> As antenna I use the recommended multi-band active gnss antenna
> HAB-ANN-MB-00-00 with SMA Connector from ublox.…
I have one, and tested it. Mediocre. Put a 40mm circular ground plane
under it and it will perform slightly bettter.
> I used this ntrip streams
>
> https://igs.bkg.bund.de/ntrip/streams
That is a collection of streams. Which stream? How close is it?
RGDS
GARY
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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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