Best buy Gps Navigator Price

Author: BODECOR
Modified on 20/01/2007

The Global Positioning System (GPS) Or Global Positioning System (better known by the acronym GPSAnd his name is more correct NAVSTAR GPS) Is a Global Navigation Satellite (GNSS) which allows to determine everyone’s position an object, a person, vehicle or shed, with an accuracy up to centimeters using differential GPS; usually a few meters. The system was developed and installed, and is currently operated by the Department of Defense U.S..

GPS works through a network of 24 satellites (21 operational and 3 back) in orbit over the globe at 20,200 km with trajectories synchronized to cover the entire surface of the earth. When you want to determine the position, the device used to it automatically locates at least four satellites in the network, that receives signals indicating the position and the clock of each one. Based on these signals, the device synchronizes the GPS clock and calculates the delay of the signals, ie the distance to the satellite. For “triangulation”Calculates the position in which it is located. The triangulation in the case of GPS, unlike the 2-D case is to ascertain the angle with respect to known points, is based on determining the distance of each satellite relative to the measuring point . Knowing the distance, is easily determined one’s position relative to the three satellites. Knowing well the coordinates or position of each of them emitting the signal, we obtain the absolute position or actual coordinates of the measuring point. Also achieves extreme accuracy in the GPS clock, similar to that of the ground atomic clocks synchronized to the satellites.

The former Soviet Union had a similar system called GLONASS, Now managed by the Russian Federation.

Currently European Union attempts to launch its own satellite positioning system, called ‘Galileo’.