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GPS (Global Positioning System) is a satellite-based navigation system that allows users to determine their precise location anywhere on Earth. It provides accurate positioning, velocity, and timing information to a GPS receiver. The system consists of a network of satellites in space, ground control stations, and GPS receivers.

The primary purpose of GPS is to provide navigation assistance. GPS receivers use signals transmitted by multiple satellites to calculate their position on Earth. By receiving signals from at least four satellites, a GPS receiver can determine its latitude, longitude, and altitude with high accuracy.

GPS has various applications in different fields, including aviation, maritime navigation, surveying, mapping, agriculture, transportation, and personal navigation. In aviation, GPS is used for aircraft navigation and landing approaches. In maritime navigation, GPS is used for ship positioning and collision avoidance. In surveying and mapping, GPS is used for precise mapping and geospatial data collection. In agriculture, GPS is used for precision farming and yield mapping. In transportation, GPS is used for vehicle tracking and fleet management. And in personal navigation, GPS is used in devices like smartphones and car navigation systems to provide turn-by-turn directions.

GPS receivers are now widely available and are integrated into various devices such as smartphones, tablets, smartwatches, and car navigation systems. These devices use GPS technology to provide location-based services and applications, such as finding directions, locating nearby places of interest, tracking fitness activities, and more.

Overall, GPS is a powerful and versatile technology that has revolutionized navigation and positioning. It has become an essential tool in various industries and has greatly improved our ability to navigate and locate ourselves accurately on Earth.