GPS tracking

From: Stan Wijnans (
Date: Tue Feb 10 2004 - 14:23:30 EST

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    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  ...
    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 :-)) ??
    Any help is much appreciated
    Thanks, Stan
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