+TOPONA Posted July 30, 2012 Share Posted July 30, 2012 Disclaimer: I am not GPS-savvy, I only know the very basics. I tried to browse through all the documentation made for normal users as me though; that lead me to understand something, but I still miss a big point. It is about multipath. As far as I've understood, the problem is that it under some circumstances (most noticeably in canyons, urban or not) GPS signals are deflected by obstacles, so they get to the unit across multiple paths, as pictured in Wikipedia: And on kowoma.de: . So the unit gets more than one signal from the very same satellite. So far, so good; assuming that I got it right. Now, the question is. Being the correct path always the shorter (any deflected path is obviously longer than the straightforward one), couldn't the unit filter out all of them but the shortest, so to solve the issue? The answer is of course not, elsewhere they would and multipath would not be an issue. What I'd love is to understand the reason why, and this probably is related with the fact that I miss some important piece of information. Would please some GPS-saviour enlighten me and the other curious people around? Any information would be truly appreciated. Thank you all very much! TOPONI Quote Link to comment
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