THE GLOBAL POSITIONING SYSTEM is a global navigation satellite system. It provides reliable positioning, navigation, and timing services to worldwide users on a continuous basis in all weather, day and night, anywhere on or near the Earth, which has an unobstructed view. GPS is made up of three Segments, Space, Control and User. GPS receivers use to provide three-dimensional location Latitude, Longitude, and Altitude plus precise time. GPS has become a widely used aid to navigation worldwide, and a useful tool for investigation.
