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 ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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