The mechanism behind the functioning of GPS technology is based on a network of satellites orbiting the Earth, broadcasting signals. A GPS receiver calculates its position by triangulating the signals received from at least four satellites. The time delay between the signal transmission and reception provides distance measurements, enabling the receiver to determine its latitude, longitude, and altitude. The accuracy of GPS can be influenced by atmospheric conditions, signal blockage, and multipath effects, but advancements have significantly improved its reliability and precision in navigation applications.