if we hear the term "GPS", which would probably be to our mind is a digital camera with maps and other functions, which tells us our exact position on earth. But did you know that the device is only part of GPS? The device is a GPS receiver, and while it is certainly a GPS device, it is only part of a very large and complex system that allows us to measure precisely our situation on earth.
The three-scored Hot "GPS for Global Positioning System. This is a satellite navigation system, which has the ability to measure the object on the exact location of the land. The U.S. Department of Defense (DOD) and the official called the Navstar GPS (navigation signal Timing and Ranging Global Positioning System). It is designed to be used only for military operations, but was for Civilian since the 1980s.
The Global Positioning System is an enormous and complex, which can be divided into three segments: space, control and users. "Control" segment focuses on different stations on land, the maintenance and control system. The "lounge" segment, GPS refers to its satellite system that transmits signals identifying the situation. The "User" segment on the GPS receiver - the unit that we think are wrong, because the system.
CONTROL
"Control", the GPS-segment focuses on different ground stations, the United States by the Defense Ministry, which controls many aspects of the system. More specifically, these stations to monitor the flight of GPS satellites, to synchronize the atomic clocks on board satellites, and invite you to transmit data from satellites.
SPACE
The "lounge" segment of GPS is a constellation of 27 satellites that orbit the Earth 12,600 miles above the surface. 24 of these satellites are in service, while three others are in standby mode and will only be used if one of the 24 failed. Each trip satellites around the earth twice in less than 24 hours, starting with a speed of about 7000 kilometers per hour.
Each of the GPS satellites in the configuration weighs between 3000 and 4000 books. All these satellites are solar-powered, but all have backup batteries are on board, in the absence of solar energy (ie, the solar eclipse). Satellites are also small booster rockets to fly on the right track.
The signals from the GPS satellites Low-Power are radio signals. These signals contain three types of data - a pseudo-random code, ephemeris, almanac and the data - decrypted by the GPS receivers for accurate measurement of his situation. The pseudo-random code indicates the recipient, which sends the signal via satellite, while the ephemeris data provides information on the position of a satellite. In the meantime, the almanac contains information such as the status of satellites, the date and time.
USER
"User" segment of GPS refers to a GPS receiver, either for civilian or military needs. The GPS receiver is essentially an electronic device, the signal from satellites and information on these signals to determine its exact position. Of course, this is much more complex than a simple summary of his doing.
The GPS receiver, in fact, needs two things for them to assess their situation. First, we must tell information on the situation of at least three GPS satellites. So it would be necessary for the length between her and each of the three GPS satellites. The first information may signal the satellite, while the second group of data can be by measuring the speed at which the signal was received.
ALL-IN-ONE SYSTEM
The combination of control, space and user segments, we have a global positioning system can show that our exact situation here on earth.
As you can see, the GPS is not only the single GPS receiver. It is a huge system, a very complex and on. But because any other part of the system is also of the Defense Section, we should never think about the coins. All we need to do is secure a GPS receiver and, in a moment, we get information on our current site and other attractions and road conditions, the recipient May we want to know.
