We currently have over 30 GPS satellites orbiting the Earth at around 20,200 kilometers or about 12,550 miles above us, with at least four always visible from any point on Earth's surface.

However, GPS always uses data from at least four satellites in order to account for receiver clock drift. So where does Einstein come in? Of course, it's his theory of relativity .

How GPS Works: A Network of Satellites and Clever Calculations So, how does this marvel of modern technology actually work? At the heart of GPS lies a network of meticulously positioned satellites ...

But how does GPS work? Since the U.S. satellite-based system initially limited to military applications was ... GPS satellites circle the earth twice a day at an altitude of 13,000 miles while ...

But how does GPS work? Print Subscription-$35 for the Best Field & Stream Stories · Subscribe ... GPS satellites circle the earth twice a day at an altitude of 13,000 miles while traveling at a ...

Then the concept underwent a series of rebrandings – the system of satellites was renamed to DNS, later to NavSTaR, and the modern name GPS was received only in 1973. Over the next two decades, 24 ...

For less than $100, you can get a pocket-sized gadget that will tell you exactly where you are on Earth at any moment. As long as you have a GPS receiver and a clear view of the sky, you'll never be ...

How does GPS work? Each GPS satellite continuously broadcasts a radio signal containing information about its location in orbit, operational status, and the time at which the signal is emitted.

We currently have over 30 GPS satellites orbiting the Earth at around 20,200 kilometers or about 12,550 miles above us, with at least four always visible from any point on Earth's surface.

For less than $100, you can get a pocket-sized gadget that will tell you exactly where you are on Earth at any moment. As long as you have a GPS receiver and a clear view of the sky, you'll never be ...