How It Works ยท Technology
Global Positioning System
Satellites providing location signals
This explainer breaks GPS into the practical pieces that matter: satellite timing, trilateration, signal delay, and the limits that affect accuracy in phones, cars, and maps.
- atomic clocks
- trilateration
- ephemeris
- receiver
- time-offset
Inputs
Precise time and orbital data broadcast by satellites.
Process
Receiver measures signal delays from at least four satellites to solve position and clock bias.
Outputs
Latitude, longitude, altitude, and time for navigation and timing.
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