Global Positioning System (GPS)

Generally Tracking is the observing of persons or objects on the move and supplying a timely ordered sequence of respective location data to a model. The Global Positioning System (GPS) is a space-based satellite navigation system that provides location and time information in all weather conditions, anywhere on or near the Earth. It uses the technique of trilateration to calculate the coordinates of the device on Earth by measuring the time taken for signals from various satellites to reach them. The coordinates are then used to locate the GPS device on a map, which is either   displayed to the user or used as a basis for calculating routes, navigation, or as input into mapping programs. This can be enabled with simple devices like watches, mobiles etc fitted with a GPS receiver. The system provides critical capabilities to military, civil and commercial users around the world.
          In virtual space technology, a “Tracking system” is generally a system capable of rendering virtual space to a human observer while tracking the observer's body coordinates. For instance, in dynamic virtual auditory space simulations, a real-time head tracker provides feedback to the central processor, allowing for selection of appropriate head-related transfer functions at the estimated current position of the observer relative to the environment.
There are a myriad of tracking systems. Some are 'lag time' indicators, that is, the data is collected after an item has passed a point for example a bar code or choke point or gate. Others are 'real-time' or 'near real-time' like “Global Positioning Systems” (GPS) depending on how often the data is refreshed. There are bar-code systems which require a person to scan items and automatic identification systems like ‘Radio frequency identification’ (RFID auto-id). For the most part, the tracking worlds are composed of discrete hardware and software systems for different applications. That is, bar-code systems are separate from...