Mechanics / Electrodynamics
February 01, 2015
Distances are currently determined in GPS in accordance with special relativity. The signals travel from satellite S to receiver R on the Earth and to other satellites with identical speed C and the speed does not depend on the Earth's rotation. Because of the Sagnac effect, it is shown that negligible mistakes arise in the GPS. However, greater changes take place due to the moving atmosphere, which changes the speed of light, causing all signals to travel with different speeds.