GPS全球定位系统GPSglobalpositioningsystem.doc

GPS 全球定位系统(GPS global positioning system)
GPS global positioning system in the best outdoor home, GPS will be shielded,5 degrees. The distribution of satellites makes it possible to observe more than four satellites at any time and anywhere in the world and maintain good geometric accuracy (DOP). This provides a continuous global navigation capability over time.
The ground monitoring includes four monitoring stations, one upstream into the station and a control station. The monitoring station has a GPS user receiver, an atomic clock, a sensor for collecting local meteorological data, and a computer for preliminary processing of data. The main task of monitoring station is satellite observation data and the data is transmitted to the master station. The master station located at Vandenberg Air Force base. It has overall control over the ground monitoring department. The main task is to collect the master station monitoring station all the observation data of the GPS satellite, the calculation of each GPS satellite using these data of orbit and satellite clock correction value.
Upstream into the station are also located in Vandenberg Air Force base. Its main task is to put this kind of navigation data and instructions into the satellite station in each satellite to run over. The injection takes place every day on the GPS satellite and carries out the final injection before the