Levi Quinn's Article List
How does the gps system work?
Publish: 27-07-2009 | author: Levi Quinn
Global Positioning System or GPS is a technological innovation that uses the number of satellites in earth orbit, to send signals back to earth to enable the GPS receiver to calculate and identify an appropriate location, time and speed information from the user. The GPS receiver may be able to show the location of a person at any time by using the signals from three or more satellites. Initially, GPS was created by the U. S. Department of Defense and used for military purposes. Although the system began to be used in 1980's became available for general use in 1990 s. The main advantage of GPS is that you may be able to work even in any weather or any night.