Re: Galileo purported 1 m [horizontal?] position accuracy

You know, what that suggests to me is a "local" differential service you
subscrib to (like we once had in the US) to get im accuracy... They
didn't mention an SBAS in that writeup -that I could tell...???

JY

Sam Wormley wrote:
>
> Stichting ST wrote:
> > On Wed, 28 Dec 2005 13:09:40 +0100, "M. Handschuher" <k12@xxxxxx> wrote:
> >
> >
> >>Ron Lee wrote:
> >>
> >>
> >>>how does the EU come up with 1 meter?
> >>
> >>They are using more precise clocks in the satellites.
> >>
> >>Manfred
> >
> >
> > That magically '1 meter' pops up regularly in news reports and the like.
> > But the ESA ducumentation
> > http://europa.eu.int/comm/dgs/energy_transport/galileo/doc/galileo_hld_v3_23_09_02.pdf
> > tells about the open service, what is equivalent to what we have now with our
> > handheld GPS receivers the following:
> >
> > Open Service (positioning) Single frequency Accuracy (95%) (10 degree mask
> > angle) Horizontal 15 m vertical 35 m.
> > With a dual frequency receiver doing ionospheric correction herself: H= 4m
> > V=8m.
> >
> > When you want to pay for extra (commercial) you get also two additional
> > encrypted signals with ranging code and data what will give you:
> > Public-Regulated Service (dual frequency) H= 6.5 m V= 12 m
> >
> > They plan to offer a special service for users needing more:
> >
> > Locally assisted services
> > The Galileo Open, Commercial, Safety of Life and Public Regulated services
> > will be, where necessary, enhanced by means of the Galileo Local Component to
> > satisfy higher user demands with respect to accuracy, integrity, availability
> > and communication over local areas.
> >
> > And here is the '1 meter' you all heard about:
> >
> > Local Precision Navigation Services: Galileo Local Elements providing
> > differential code corrections will nominally reach positioning accuracy better
> > than 1 meter.
> >
> > And for something more:
> >
> > Local High-Precision Navigation Services: The exploitation of the Three
> > Carrier Ambiguity Resolution (TCAR) technique with Galileo Local Elements will
> > allow users to determine their position with errors below 10 centimetres.
> >
> > Piet
>
> Worth repeating!
.

Relevant Pages

  • Re: Galileo purported 1 m [horizontal?] position accuracy
    ... > That magically '1 meter' pops up regularly in news reports and the like. ... > differential code corrections will nominally reach positioning accuracy better ... > Local High-Precision Navigation Services: ... > Carrier Ambiguity Resolution technique with Galileo Local Elements will ...
    (sci.geo.satellite-nav)
  • Re: Galileo purported 1 m [horizontal?] position accuracy
    ... >They are using more precise clocks in the satellites. ... That magically '1 meter' pops up regularly in news reports and the like. ... differential code corrections will nominally reach positioning accuracy better ... Carrier Ambiguity Resolution technique with Galileo Local Elements will ...
    (sci.geo.satellite-nav)
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