How GPS works? Trilateration explained?

GPS is like having invisible friends who tell you exactly where you are on Earth.

Imagine you're playing hide and seek in a big park. You can’t see your friends, but they shout out how far away they are from you. If one friend says, "I’m 10 steps away!" another says, "I’m 15 steps away!", and the third says, "I’m 20 steps away!", you can figure out where you are by seeing where all those distances overlap, that’s your spot! This is called trilateration, which means finding a position using three distances.

GPS satellites act like those invisible friends. Each satellite sends a signal to your phone, telling it how far away the satellite is from you. Your phone gets signals from at least three satellites, and by figuring out how long the signals took to reach it, it knows the distances.

Then, it draws imaginary circles around each satellite, where the circles overlap is your location! If you get a signal from a fourth satellite, it makes the guess even better, like getting help from another friend in hide and seek.

So next time you’re using GPS, think of those invisible friends helping you find your way, no magic needed, just clever math!