At the heart of GPS is the ability to measure the distance from a receiver to several satellites. There are always 4 to 8 satellites visible at any given time. Each satellite sends out a signal, which ...

or dog collar to keep track of whereabouts afield. Regardless of how you enjoy the outdoors, like most hunters and anglers these days, you’ve probably tapped into the Global Positioning System in one ...

Many of us take navigation for granted; when we're lost, we simply pull out our phones and open Google Maps to find where we are. You could even ask Siri to give you directions if you don't want to be ...

An artist's rendering of one of the early satellites launched in the 1990's. GPS may be one of the most versatile and widely used inventions of our time. It helps us find our way home, decide where to ...