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.

How has the use of GPS technology evolved from military to civilian applications?

What are the three major parts of the GPS system?

Describe the process by which a GPS device calculates distance from satellites.

Explain how trilateration is used to determine your location.

What role does the fourth satellite play in the GPS calculation?