What is GPS?

The Gps Mobiles : GPS stands for Global Positioning System. A system of satellite navigation, built by the Department of Defense. Research on the system began in the 60th and the first GPS satellite was launched in 1978 to life. It took a while to get to the line of the whole system, but finally, in April 27, 1995 became fully operational. At the beginning of the GPS network for military purposes, but in 80 years the U.S. government was approved by the general public from using it.

The GPS network consists of:

* Satellite

* Monitoring Stations

* GPS Receiver


What GPS is a satellite?

There are currently 24 satellites orbiting the Earth is 6 different paths. Each satellite completes two rings around the Earth every day, traveling at a speed of about 7000 MPH. The highest point in its orbit, are more than 12,000 miles above the Earth. From this time the satellite signals, much of the earth's surface are received. The unit works by receiving GPS satellite signals and calculate the multiple position of the receiver based on the triangulation of different signals. Accuracy is received with each additional satellite signal, so the orbits of satellites are set to the highest points on Earth are at least 4 signals that can be received, increases. Of course this is just a theory, because the landscape around you, some or all of the GPS signals can be blocked.

What is a GPS Monitoring Station of the Earth?

There are four manned stations in the USA and a Master's manned station in Colorado Springs, Colorado. The four stations relay information about the position of satellites to the master station. The station master uses the information given the position of the tiles properly SA and sends the corrected data back to the satellites. This synchronises the data that each satellite transmits to your GPS receiver and ensures that the recipient will always work with the correct information.

What is a GPS receiver?

GPS satellites transmit radio signals from low power, which can only be retrieved when the GPS device a "line of sight" to the satellite. The signals can pass through objects such as glass, plastic and clouds, but no permanent structures such as buildings or cliffs. A GPS unit works by triangulating your position on the position of at least three satellites of the GPS system. He compares the time required for a signal from each satellite in the series and calculates the location data were received.

If you have only three satellite signals, the GPS device, you can use your location in latitude and longitude of the report. However, if the GPS unit uses signals from at least four satellites, but also calculates the amount. Now you can report your trip distance, distance to destination, speed, height and even as your GPS has an altimeter.