How does GPS technology know your exact location?

GPS technology knows your exact location by using special signals from satellites high up in space.

Imagine you have a map and three friends who each know where you are, but they're all standing far away. They can tell you how far away they are from you, and with that information, you can figure out exactly where you are on the map.

That’s what GPS does. It uses signals from satellites to measure how long it takes for a message to travel from the satellite to your phone or device. By knowing how fast the signal moves and how long it took, it can tell how far away the satellite is from you.

There are many satellites in space, each sending out messages. Your phone gets these messages and uses them like clues. If just one satellite tells you how far away you are, you could be anywhere on a big circle around that satellite. But with more satellites telling you their distances, your phone can figure out the exact point where all those circles overlap, and that’s where you are!

It's like having multiple friends tell you how far they are from you, the more friends you have, the easier it is to find your spot on the map.