As compact and lightweight as GPS receivers can be, they perform an incredible feat. Perhaps the most sophisticated aspect of GPS technology is this measurement of time. A GPS receiver calculates the time it takes for the satellite signal to reach the ground, and to avoid confusion, each satellite uses its own code to transmit a signal. By determining how late the satellite's code appears in relation to the unit's time, the receiver figures out how long the signal took to reach the location. The last step is to multiply that distance by the velocity (speed of light) in order to calculate distance. These numbers are calculated for three or four satellites simultaneously in order to "triangulate" the GPS receiver's position.

GPS Tracking Systems

Welcome to GPS Systems and Devices Info Outlet, your one and only source for GPS Systems research and information. Here you'll find the most comprehensive and impartial information on GPS Tracking Systems of all kinds and for all types of users. Whether you are considering the use of a Marine GPS System, Car GPS System, Aviation GPS System or a Mapping GPS System, you will find answers to all of your questions here. We will also analyze top rated GPS Systems manufacturers such as Garmin GPS Units, Magellan GPS Units, Navman GPS Units and DeLorme GPS Units.