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Re: my total miserable failed experiment with PPP and rtklib
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From: |
Gary E. Miller |
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Subject: |
Re: my total miserable failed experiment with PPP and rtklib |
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Date: |
Tue, 25 Jul 2023 12:08:32 -0700 |
Yo Greg!
On Tue, 25 Jul 2023 14:56:26 -0400
Greg Troxel <gdt@lexort.com> wrote:
> > SBAS, for older GPS, just makes startup faster. It adds no
> > accuracy. It also has some air traffic functions.
>
> Huh? SBAS is not "assisted GPS". It is space-based augmentation
> service, and is the general concept of which WAAS (US) and EGNOS (EU)
> are specific systems.
What it "augments" is startup, and failure detection, not accuracy.
This is why recent receiver, like the u-blox 9, do not bother to
listen to SBAS anymore.
> However "recalculate from wgs84 data" doesn't really make sense
> although various clarifications of that might.
I think he meant WGS84 "data", not date.
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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