The Basic Of GPS

The Basic of GPS By now, you've likely heard about this hot new technology called GPS. Handheld GPS receivers are popular items that are being used by everyone from outdoors enthusiasts to average drivers. But, how many of us really understand the technology behind these modern night and day receivers? There is a whole lot of power and capability packed into a GPS receiver. They are linked to complex satellite systems in outer space, providing a reliable navigational system to users on earth.

Many new cars have GPS receivers included as standard equipment. Hikers, Fisherman, Bickers, Truckers, Pilots, praca jasło sprzątanie and much more, use them to find their destinations, and treasure hunters rely on them for Geocaching excursions. Simply, a GPS is an electronic device that can determine one's precise location on earth. The entire system is anything but simple; and the GPS receiver is but a single and minute part of this immense network. GPS is the short form of Global Positioning System.

This very large navigation system was developed and implemented by the United States' Department of Defence (DOD). The system is composed of a network of 24 operating satellites; various ground stations located at points throughout the world and individual GPS receivers. All of the 24 satellites in the GPS network are active, and continuously send out Ultra High Frequency (UHF) radio signals. GPS receivers use these signals to determine their geographical location. It is important to note that there are other satellite system as Glonass (Russia) and Galileo (Europe), but for the moment, GPS (USA) is the only fully functioning satellite navigation system.

The primary function of a GPS receiver is to pinpoint its actual location on earth using the signals it intercepts from GPS satellites. To do this, the GPS receiver must be able to locate and intercept signals from three or more GPS satellites. After intercepting the signals, GPS receivers use basic principles of mathematics called triangulation or trilateration to compute its actual position. Before any triangulation calculation can be implemented, however, the GPS receiver must verify two points: masazysta praca niemcy 1- The positions of at least 3 satellites.

2- The distance between each satellite and the receiver. GPS receivers decode the signals in order to determine the locations of at least three GPS satellites. The signals transmitted by GPS satellites are radio signals, and each contains three different bits of information: ephemeris data, almanac data and a pseudorandom code. The ephemeris data is the information that the GPS receiver needs to be able to determine the actual position of the satellite transmitting the signal.

The distance of a GPS receiver to a satellite is measured using the signal's speed, or the time delay from the initial transmission of the signal, to its reception by the GPS. From this speed or time difference, the GPS receiver calculates the satellite's distance. With information about the location of at least three satellites, along with their individual distances, a GPS receiver utilizes the basic principle of triangulation to calculate its actual position in terms of altitude, latitude and longitude.

GPS receivers are incredibly accurate, usually to within ten meters of radius. It is possible, however, to increase this accuracy level using supplemental technologies; for example, GPS receivers using multiple parallel channels can achieve an accuracy level to within two meters.

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