[FOSS-GPS] High accuracy positioning with low cost GPS devices:a FOSS project

Martin Vermeer martin.vermeer at tkk.fi
Fri Oct 10 04:16:38 EDT 2008

On Fri, 10 Oct 2008 09:50:29 +0200
Abdelrazak Younes <younes.abdel at gmail.com> wrote:

> On 10/10/2008 09:29, Martin Vermeer wrote:
> Hey Martin! I didn't know you were in the GNSS field! Glad to 'see you' 
> here :-)
> > Actually we have here at TKK been playing around with GPStk, and trying
> > (unluckily) to get funding for using an older chipset from Fastrax for
> > getting our sticky fingers on the carrier phase. That could give
> > centimetre precision!
> >    
> I am working right now with the Ublox LE4T and I have bad news for you: 
> the carrier phase is in a pretty bad state compared to what you get with 
> higher end receivers from Novatel or Septentrio. I assume we will face 
> the same situation with many (all?) low-end receiver; so kinematic 
> positioning is a pretty utopic goal if you ask me ;-)

Actually static is more what interests us. And I have seen better
results (though not as good as for the geodetic stuff) for itrax. But
you may have to get into the innards.

> > http://www.gpstk.org/pub/Documentation/GPSTkPublications/vermeer-baseline-processing-ion-gnss-2006.pdf
> >
> > (using expensive geodetic receivers)
> >
> > We would certainly be "in the market" for cooperation on this.
> >    
> This GPStk toolkit is interesting. Looks like they have done a lot of 
> what I am doing right now... Looks like lots of people are inventing the 
> same wheel at the same time :-)
> Abdel.

- Martin

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