Re: GPS tracking

From: Amaury Jacquot (
Date: Tue Feb 10 2004 - 15:10:05 EST

  • Next message: Björn Gimle: "Obs 5918 Feb.10"

    Stan Wijnans wrote:
    > This might be the wrong list, but I thought I try as I think somebody 
    > might know !
    > I am interested in developing a GPS tracking system to trigger people 
    > for an art project. I'm trying to find out if this is possible inside a 
    > building as I am aware that GPS tracking has already been developed for 
    > outside but seems to be weak inside  ...
    you can't do that with GPS.
    there are two level of details you may want to use
    level 1.
    which room the person is in.
    this requires only some RFID detection in each room, and the person 
    carrying an RFID device at all times
    level 2.
    where in each room is each person located.
    this requires sophisticated electronics in a transponder and a 
    triangulation system in each room.
    > Does anybody know how to make the GPS sensitive enough to go through 
    > walls, do I need a differential GPS or has anybody suggestions ? I have 
    > seen people on mobile phones in the tube in Asia, so something should be 
    > possible .... but how :-)) ??
    there's no way GPS would work in this case, as a simple metal shield 
    (rebars in a building), or water-loaded material (even trees) eat-up the 
    GPS signal
    > Any help is much appreciated
    > Thanks, Stan
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