Einstein's Impact On GPS

A columnist explains how global positioning systems link are based on an Einstein theory as an argument for why continued funding of research is essential.

General relativity predicts "that the relative clicking of clocks changes depending on their position in a gravitational field. Satellites located high above Earth are moving in a gravitational field that is slightly weaker than what we experience on the ground. As a result, their internal clocks tick at a different rate than those on Earth. The effect is extremely small, but it is comparable to the accuracy needed to distinguish the position of objects on the scale that is otherwise possible with needed by global positioning devices."

Thanks to Ashwani Vasishth

Full Story: The Long Arm of Einstein Guides My Steering Wheel

Comments

Prepare for the AICP Exam

Join the thousands of students who have utilized the Planetizen AICP* Exam Preparation Class to prepare for the American Planning Association's AICP* exam.
Starting at $245
AICP CTP Storefont Display

The first online AICP* CTP exam prep class

Are you ready to take the AICP* Certified Transportation Planner exam?
Priced at $245 for May exam!
Woman wearing city map tote bag

City Shoulder Totes - New Cities Added!

Durable CityFabric© shoulder tote bags available from 7 different cities.
$22.00

Essential Readings in Urban Planning

Planning on taking the AICP* Exam? Register for Planetizen's AICP * Exam Preparation Course to save $50.
$369 includes free shipping!