What is Global Positioning System (GPS)?
GPS is a radio navigation system that allows users to determine their exact location and time 24 hours a day, in all weather conditions, anywhere in the world. If the receiver is equipped with a display screen that shows a map, the position can be shown on the map. If you are moving, your receiver may also be able to calculate your speed and direction of travel, and give you estimated times of arrival to specified destinations. Simply add our RouteMatch AVL module to gain the advanced functionality of GPS and vehicle tracking.
Global Positioning System or GPS is a constellation of 27 satellites orbiting the earth at about 12000 miles. These satellites are continuously transmitting a signal and anyone with a GPS receiver on earth can receive these transmissions at no charge. By measuring the travel time of signals transmitted from each satellite, a GPS receiver can calculate its distance from the satellite. Satellite positions are used by receivers as precise reference points to determine the location of the GPS receiver. If a receiver can receive signals from at least 4 satellites, it can determine latitude, longitude, altitude and time. If it can receive signals from 3 satellites, it can determine latitude, longitude and time. The satellites are in orbits such that at any time anywhere on the planet one should be able to receive signals from at least 4 satellites. The basic GPS service provides commercial users with an accuracy of 100 meters, 95% of the time anywhere on the earth. Since May of 2000, this ha
The Global Positioning System, commonly known as GPS, is a network of satellites that determines a ground based user’s specific latitude, longitude, and altitude. GPS devices have become more integrated in our daily lives through navigation computers in cars to emergency locators in cellular phones. GPS can even keep the time accurate on watches and VCRs. Portable GPS receivers are becoming increasingly popular for young and old alike. For the GPS to work there are twenty-four satellites in Earth’s orbit. Each satellite is spaced so that at least four can be used by any given receiver on the ground. The satellites each contain a computer, radio, and an atomic clock. Because it uses the frequency of atoms rather than quartz or gears to keep time, an atomic clock is more accurate than a normal clock. The satellites transmit radio signals to a receiver on the ground and the receiver calculates its position in relation to the satellites. A minimum of three satellites are needed to provide
