what does gps do
What is a GPS? How does it work? The Global Positioning System (GPS) tells you where you are on Earth. It’s eleven o’clock ... do you know where your kids are? Would you like to? One way to track them would be to have a GPS receiver installed in the car! The GPS, or Global Positioning System, is one of the hottest technologies around, and no wonder. Consider these diverse uses: Minnesota scientists use GPS to study movements and feeding habits of deer.
The Global Positioning System (GPS) is a satellite-based navigation system made up of a network of 24 satellites placed into orbit by the U.S. Department of Defense. GPS was originally intended for military applications, but in the 1980s, the government made the system available for civilian use. The first GPS satellite was launched in 1978. 2  A full constellation of 24 satellites was achieved in 1994. 3  Each satellite is built to last about 10 years. 4  Replacements are constantly being built and launched into orbit.