GNSS is a satellite navigation system with global coverage. It allows a GNSS receiver to determine its precise location, such as longitude, latitude within a few meters. Therefore, the tracking of the target objective built-in a GNSS Receiver on the earth can be possible.
Current satellite global navigation system are global the United States of America's GPS to be fully operated since 1995, the Russian GLONSS and the Chinese Compass. Because that a GNSS's failure or malfunction causes serious damages to the national defense, aviation, maritime and so on. the network-based position error correction system, that is termed DGNSS(Differential GNSS) is necessary.
• GPS/Galileo signal receiving technology
• GNSS signal monitoring technology
• DGPS/DGNSS reference station design, installation and operation technology