GPS stands for Global Positioning System. Basically, GPS is a device that receives signals from at least three orbiting satellites to tell the user exactly where he is and guide him to another specific location. When the receiver is locked on 3 satellites, can give the length and direction of the accuracy of latitude position within 15 meters. If you use four or more satellites, GPS can also give a raised position. Once the position, other information as speed, distance travel of sunrise and sunset can be calculated. Like a circle of many satellites in 24 of our Earth in a very precise orbit, making that the information they convey very precise.
When the receiver is locked on 3 satellites, it can give longitude and latitude of leadership that is accurate 15 meters. If you use four or more satellites, GPS can also give a raised position. Once the position, other information like the speed, distance travel and rising sun sunset can be calculated. The new types using the Wide Area Augmentation System (WAAS) have an accuracy of 3 meters. Differential GPS (DGPS) used by the U.S. Coast Guard are also accurate to three meters.
GPS was developed by the Department of Defense purposes military, but the government has decided to inform the civilian population. It has certainly been a concern for negotiating and driving traffic to a destination abroad. Instead of listening to the instructions of the man without late May or may not be clear and now we have these invisible zoom overhead satellites to reach our destination.
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Article Source: ArticlesBase.com – What is a Gps?
