GPS and Einstein's Relativity: Satellite Clocks, Earth Rotation, and Accuracy
About this Capsule
GPS accuracy depends on precise clock synchronization between satellites and receivers, and that synchronization requires Einstein’s relativity. Readers will understand how satellite motion, gravitational effects, orbital shape, and Earth’s rotation influence GPS timing, and why correcting for these effects is essential to the location accuracy used every day.
Most people think GPS just uses satellite signals to find your location, but it actually depends heavily on Einstein’s relativity to keep clocks synchronized. Unlike common belief that satellites’ clocks run perfectly, GPS receivers must apply precise relativistic corrections for satellite orbit shape and Earth’s rotation to avoid errors. By understanding and using these corrections, GPS devices achieve the accuracy we rely on every day.
GPS and Einstein's Relativity: Satellite Clocks, Earth Rotation, and Accuracy
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