Global Positioning System is a well known technology, whose origins date back to the past century and derived from a project of the US Department of Defense: the NAVSTAR GPS.
Based on a fleet of about 25 satellites (medium earth orbit), it send signals to GPS receivers to establish the Geographic location, time and some other spatial variables.
Though developed to fulfill military uses, it was released to the public in 1983 and since then the commercial and scientific applications of GPS are almost countless. In fact, being GPS the only …