![Article Image](https://www.freedomsphoenix.com/Uploads/Pix/687-0104100258.jpg)
Building A GPS Receiver From The Ground Up
• HackadayOne of the more interesting facets of GPS is that, at least from the receiver's point-of-view, it's a fairly passive system. All of the information beamed down from the satellites is out in the ether, all the time, free for anyone on the planet t