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There is a program at my school that does some work with GPS navigation. The teacher told me that some GPS systems can be off by several meters. Other systems can be accurate to even inches. There is something called differential correcting that gives an additional signal from towers on the ground to get the increased accuracy. I don't know much more about it than that.
BTW, this program at my school is called EAST. I know at least a few schools over the US have the program. The reason I bring it up though is that they got a $200,000 dollar grant for it. (which I am still mad about because robotics is way more deserving).
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Teacher/Engineer/Machinist - Team 696 Circuit Breakers, 2011 - Present
Mentor/Engineer/Machinist, Team 968 RAWC, 2007-2010
Technical Mentor, Team 696 Circuit Breakers, 2005-2007
Student Mechanical Leader and Driver, Team 696 Circuit Breakers, 2002-2004
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