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What is gps


Added: 18-12-2005
Author: Markus Hamilton
Category: GPS 		← Back | ↓ Related | Home →


GPS stands for Global Positioning System. Is a satellite radio navigation system built by the U. S. Department of Defense. Research on the system began 60 s and the first GPS satellite was launched in 1978. This was when he took the entire system to come online but finally on April 27, 1995 became fully operational. At first, the GPS network for military use, but in 80 S from the U.S. government authorities also made public its use.

GPS network consists of:







What GPS satellites?

Now there are 24 satellites that orbit the earth is 6 different tracks. Each satellite completed two orbits around the earth every day, traveling at the speed of 7.000 mph. At the highest point in their orbits more than 12.000 miles above the earth. From this altitude, the satellite can receive signals over a large percentage of the face of the earth. GPS unit works by receiving a signal and calculate the position of a satellite receiver on a different signal triangulation. Accuracy increases for each additional satellite signal that is received so that the satellite's orbit to make so many points that the world is at least 4 signals that can be accepted. Without doubt, this is only theoretical since the landscape around you can prevent some or all of the GPS signals.

What GPS Earth Monitoring Station?

There are four unmanned monitoring in the United States and one master manned center which is located in Colorado Springs, Colorado. Unmanned stations fourth position from the satellite data relay station master. Station Master used to inform the right position to sit tiles and re-send corrected information to the satellite. This synchronization of data each satellite transmits your GPS receiver to ensure that your recipients are always working with accurate information.

Is the GPS receiver?

GPS satellites send radio signals of natural resources can only be accepted if your GPS unit has a direct line to the satellite. The signal can penetrate things like glass, plastic and clouds, but not solid structures like buildings or rocks. GPS units work with triangulating your location based on the position of at least three satellites in the GPS system. Comparing the time required is a signal received from each satellite in a different and calculate your location based data.

If only you could take three satellite signals, your GPS unit you can report your local latitude and longitude. However, when the GPS unit takes the signal from at least four satellites also calculate your altitude. Now can report your trip distance, distance to destination, travel speed and altitude and even you as a GPS receiver features an altimeter.

How accurate is the GPS unit depends on its ability to acquire and lock into the satellite signals. As you might expect, you can get what you pay for and more expensive GPS units are generally more accurate. Accuracy better than consumer demand when the old couple feet or less expensive than the unit can be up to 30-40 meters or more. Plan where you use your GPS receiver can determine whether it's worth shelling out extra money to improve the accuracy. If you re-use your GPS unit's best flat theme clear view of the sky less expensive units can do almost as well as the phone receiver. However, if the program using the receiver in dense tree cover, when Hiking in the valleys or narrow the gap, or between tall buildings, you ll get a better accuracy and higher end GPS units.

Now you know the basis of how GPS works and can answer the question What is GPS?.



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