A Guide to Global Positioning System

The video tutorial explains the Global Positioning System (GPS), a network providing location and time information globally. Initially developed for military use, GPS is now accessible to anyone with a GPS device. The system comprises satellites, control stations, and receivers. GPS devices calculate location using signals from satellites through trilateration, determining distance from at least three satellites. A fourth satellite verifies the location accuracy. The tutorial details how trilateration works and the role of the fourth satellite in ensuring precise location data.

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