Parallax GPS Accuracy

You know I just watched something the other day that caught my attention - they(Stanford University) claim that using a stationary GPS antenna and 4 GPS antennas mounted to a RC helicopter, they can get 1cm accuracy.

Here is a link: Look for the clip called "roboflyers"

http://pbs-saf.onstreammedia.com/cgi-bin/visearch?user=pbs-saf&template=template.html&query=+ClipCategory%3Acomputers+ClipCategory%3Atechnology&category=ClipCategory%3Acomputers+ClipCategory%3Atechnology&viKeyword=&submit=Search&page=21

Hope that helps.