How does GPS work? NASA explains; check out the graphic too

Earlier, humans used to look at the skies to find their way while figuring out where the constellations were and where they were going. Now, we have GPS, short for Global Positioning System. Kind of self-explanatory. (Unsplash)

Also, in recent times, instead of tracking constellations, we use satellites. However, it's not just satellites, but the entire process and infrastructure built around them, that helps humans to tell about their exact location.  (Unsplash)

In effect, the Global Positioning System (GPS) is a system of satellites, ground stations, and receivers. That phone in your pocket is one such receiver and sender too. (Unsplash)

The Satellites act like stars in constellations with a specific location, while ground stations use radar to make sure they are actually where humans think they are. (Unsplash)

The receiver is exactly the device that humans use to receive a signal from satellites and figure out how far away they are from some point on Earth they are going to.  (Unsplash)

So how exactly does GPS work? NASA says that "once the receiver calculates its distance from four or more satellites, it knows exactly where you are." (NASA)

"From miles up in space your location on the ground can be determined with incredible precision! They can usually determine where you are within a few yards of your actual location," says NASA. (Unsplash)

That's how your smartphone or GPS-enabled device in your car ensures it finds the exact location. (Unsplash)

Your phone, or any device with a GPS, is programmed to know where all the satellites are at any given time. (Unsplash)

Fun Fact! There are over 30 satellites used for GPS, orbiting over 16000 miles or 26000km above the Earth to help you locate the exact location.  (Unsplash)