Global Positioning System (GPS)
Definition - What does Global Positioning System (GPS) mean?
Global Positioning System is space-based navigation system which provides time and location information of a place on or near the Earth. The system functions in all weather conditions and it provides critical capabilities to civil, commercial and military users around the world. The system was created by the government of the United States, which is responsible for maintaining it and making it accessible to everyone with a GPS receiver. The accuracy of the location is anywhere from hundred to ten meters for most of the system.
Petropedia explains Global Positioning System (GPS)
The Global Positioning System circles the Earth twice in a day in an orbit and transmits the signal information to the Earth. The receiver takes the information and calculates the exact location of the user using trilateration. The receiver then compares the time when signal was transmitted by the time it was received. This difference of the time estimates how far the satellite is. The receiver also determines the position of the user and displays the location on an electronic map after determining the distance measurements from a few more satellites. Various advancements in the technology and new demands have modernized the system. The system is frequently used in science and due to its low cost anyone can own a Global Positioning System receiver.