How GPS Calculates Your Position | Trilateration Explained?

GPS uses trilateration to figure out where you are, it’s like being a detective who uses distances from three friends to find your hiding spot.

Imagine you're playing hide and seek, and three of your friends each say how far away they think you are. If one says you’re 10 steps away, that means you could be anywhere on a circle around them. But if two friends give their distances, let’s say 10 steps from Friend A and 8 steps from Friend B, now you're somewhere where those two circles overlap. That narrows it down to just a few spots.

Now comes the third friend, who says you’re 7 steps away from them. Where all three circles meet is your exact spot! GPS satellites work like your friends: they send signals that tell how far away they are from you. By using distance clues from at least three satellites, GPS can find exactly where you are on Earth.

Think of it like this: when you use a map app on your phone, the phone is asking several satellites for help, each one says how far away they are. Your phone uses those numbers to find the exact spot you’re standing on, just like finding your hiding place with three friends! GPS uses trilateration to figure out where you are, it’s like being a detective who uses distances from three friends to find your hiding spot.

Imagine you're playing hide and seek, and three of your friends each say how far away they think you are. If one says you’re 10 steps away, that means you could be anywhere on a circle around them. But if two friends give their distances, let’s say 10 steps from Friend A and 8 steps from Friend B, now you're somewhere where those two circles overlap. That narrows it down to just a few spots.

Now comes the third friend, who says you’re 7 steps away from them. Where all three circles meet is your exact spot! GPS satellites work like your friends: they send signals that tell how far away they are from you. By using distance clues from at least three satellites, GPS can find exactly where you are on Earth.