GPS units are normally good for a few tens of meters.  The centimeter
accuracies used in continental drift experiments etc. involve averaging over
long timespans.

> -----Original Message-----
> From: Joan Ilari [mailto:joan.ilari@TERRA.ES]
> Sent: Friday, April 27, 2001 11:19 AM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: [EE]: GPS guided rover
>
>
> I have built a PIC-controlled rover. Now I need to give it
> some kind of moving capability. Does it make any sense to
> try to make it to find its location through a GPS ? I have
> looked in the Net for GPS accuracy and I have seen very
> different values, depending on the technology used. For
> systems using a stationary beacon besides the satellites,
> precisions of cms. can be achieved. Has anybody tested this ?
> Are low level commercial systems (that is, not too expensive
> ones) capable of this ?
>
> If GPS cannot be used, has somebody any idea to know the
> position of my rover (besides IR beacons and triangulation) ?
>
> Thanks !
> --------------------------------------------------------------
>      Joan Ilari                 joan.ilari@terra.es
>      Barcelona                  Voice:  +34 93 431 96 39
>      Spain
>
> "I've seen things you people wouldn't believe. Attack ships on
>  fire off the shoulder of Orion. I watched C-beams glitter in
>  the dark near the Tannhauser gate. All those moments will be
>  lost in time, like tears in rain. Time to die..."
>                                                -Blade Runner-
> ---------------------------------------------------------------
>
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