Global positioning system (GPS)
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Self-Driving Cars and the Law of Canada$60.00 – $96.00
A satellite-based location system that provides time and geolocation by providing a signal to a receiver. Based on the distance from multiple satellites (at least four), a location can be provided, typically within 30 centimetres with current technology. GPS is a purely receiver-based system, with no information being uploaded, but is often augmented with cellphone technology to provide even more accurate locations or locations where the line of sight to satellites is blocked by geographic features such as mountains or buildings. Although GPS operates globally, it is owned by the government of the United States. Similar systems have been deployed by Russia (GLONASS), the European Union (Galileo), and China (BeiDou), operating on similar principles.