How GPS Works: Trilateration, Atomic Clocks, and Einstein's Relativity

Summary

An interactive exploration explaining how GPS works, covering the fundamental principles of trilateration using satellite geometry, the critical role of precise timing with atomic clocks, and the necessity of Einstein's theories of relativity (both special and general) to correct for time dilation effects. Without these relativistic corrections, GPS would become unusable within hours. Modern GPS receivers typically lock onto 8-12 satellites simultaneously for accurate positioning.