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The Global Positioning System (GPS) is a satellite-based navigation system operated by the United States Space Force and owned by the United States government. It provides location and time information to GPS receivers anywhere on the Earth and is freely accessible to anyone with a GPS receiver.
The United States government provides GPS as a service and has absolute control over the full constellation of 24 satellites and its availability to civilian and military users across the globe. As a result, many countries have developed or are in the process of setting up their own global or regional satellite navigation systems like the Russian Global Navigation Satellite System (GLONASS), China’s BeiDou Navigation Satellite System, European Union’s Galileo positioning system, and India’s NavIC.
GPS system consists of three segments. They are the space segment, control segment and the user segment.
GPS satellites transmit radio signals containing the current time and position data which are received by the GPS receivers, the time difference between when the satellite transmitted the signal and the receiver received it is proportional to the distance from the satellite to the receiver. A GPS receiver can monitor multiple satellites and calculate the precise position of the receiver. Minimum four satellites must be in view of the receiver to compute and acquire position coordinates.
GPS has become a widely used tool for commerce, scientific uses, tracking, surveillance and navigation. One of the key features of a modern smartphone is the in-built GPS receiver that determine your location and assists you in your day-to-day navigational needs.
Autonomous vehicle: GPS receivers are used in autonomous vehicles to guide them without human intervention.
Emergency services: GPS location is used for disaster relief and emergency services.
Fleet tracking: Fleet of vehicles tracked in real-time using GPS trackers to optimize business efficiency.
Geo-fencing: Vehicle tracking systems, pet tracking systems, and person tracking systems use GPS trackers attached to or carried by them to provide continuous tracking and alert notifications if the tracked subject leaves a defined area (Geo-fence)
Navigation: Navigational devices such as smart phones and smart watches use GPS receivers to identify location and provide directions and route information.
Target Tracking: Latest weapon systems use GPS to identify targets in the ground and air .
Navigation: Marines and soldiers use GPS to find targets and also to plan troop and supply movements.
GPS tracking devices
Many GPS receivers also transmit position data to a server or other interfaces using standard NMEA or proprietary protocols. One functional example would be a GPS Vehicle tracking Solution, GPS trackers are installed in vehicles to track their location and monitor additional information’s related to the vehicle. These GPS Vehicle trackers can also interface with other vehicle sensors, cameras or devices using serial connections, Bluetooth and USB.
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