Introduction to Satellite Tracking GPS Technology
09.20.2010
| tion and navigation capabilities, making the former enemies to detect and military communications applications. The development of satellite navigation technology, the United States Department of Defense began developing a plan 24 navigation satellites (NAVSTAR) of the "GPS" program. Average of 24 satellites distributed in six orbital planes, each plane have four satellites orbit the Earth orbiting operation, so that the user regardless of the ground at any place, any time, at least four or more GPS satellites in our last air for the users. Each satellite launched on the surface covered by the coordinates of its orbital plane contains the running time of radio signals, ground units can be based on the information received as positioning, navigation, landmark and other precision measurements. GPS satellite positioning systems is the use of the basic principles of triangulation, GPS receiving device to measure the transmission time of radio signals to measure the distance. By the location of each satellite, each satellite to measure the distance between the receiver, the receiver can calculate the location of the three-dimensional coordinates. As long as users accept the device using three satellite signals received, to the location where the user can set. General GPS receiving device are received by more than 4 satellite signals to determine the location and height where the user. At present the accuracy of GPS positioning receiving device, using differential positioning (Differential) technology can achieve accuracy of about 2-5 meters, or even allow a more accurate positioning. Now the global total of 5 satellite ground control station, responsible for transmitting the satellite instantaneous constant (Ephemera's Constant) and clock bias (Clock Offsets) of the amendment, so that timely provision of satellite receivers use the user more precise positioning. The ground-air satellite monitoring station, located in Kwajalein Island, Colorado Springs, Hawai |
Last data update: 10.12.2011