SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/gps-four-satellites

How does your phone's GPS figure out where you are?

It measures distances from four or more satellites.

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  1. It reads nearby street signs with the camera
  2. It measures distances from four or more satellites ✔
  3. It follows the closest cell phone

Why: GPS satellites broadcast signals, and the phone's receiver measures how far away several satellites are. With distances from at least four, the receiver can calculate its location on Earth.

Huh, didn't know that: NASA says GPS has three parts: satellites, ground stations, and receivers like the one in your phone.

The dad joke
Two satellites got married. The wedding was small, but the reception was incredible.
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References

Answer: It measures distances from four or more satellites. GPS satellites broadcast signals, and the phone's receiver measures how far away several satellites are. With distances from at least four, the receiver can calculate its location on Earth.

  1. How Does GPS Work? spaceplace.nasa.gov/gps/en
    Once the receiver calculates its distance from four or more GPS satellites, it can figure out where you are.
    Checked 2026-10-11.

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