GNSS’s full name is the Global Navigation Satellite System, it refer to all satellite navigation systems, including global, regional,and enhanced navigation system like American GPS, Russian Glonass, European Galileo, Chinese Beidou,and related enhanced systems, such as American WAAS, European EGNOS,and Japanese MSAS ect, it also covers others satellite navigation systems that will be built and built later. International GNSS system is a complex system with multi-system, multi-level, and multi- mode .
ER-GM03 GNSS and high precision DF positioning board is a small size and high precision DF positioning board. The board adopts double Antenna port, can achieve high precision direction finding and positioning. It can be locked in the satellite, continue to provide a reliable course data; not only that, the board also supports the board Measurement of heading, pitch and roll, smaller size, higher cost, new ER-237 receiver will be more easy system integration.