The BeiDou navigation satellite system

Chunhao Han
2014 2014 XXXIth URSI General Assembly and Scientific Symposium (URSI GASS)  
The BeiDou Navigation Satellite System (BDS) is a global navigation satellite system to be developed independently by China. It will provide positioning, navigation, and timing services with a global coverage by 2020. It can be used for transport, weather forecast, fishing, forestry, telecommunications, hydrological monitoring, and mapping. The service modes are the open service (OS) and the authorized service (AS). The open service is provided free of charge with positioning accuracy of 10
more » ... accuracy of 10 meters, velocity accuracy of 0.2 m/s, and timing accuracy of 50 nanoseconds. The authorized service is provided with a more secure and higher level of integrity. Beside that AS also provides communication services. A global navigation satellite system (GNSS) usually consists of three segments: the space segment, the ground control segment, and the user segment. The space constellation of BDS is composed of Geostationary Earth Orbit (GEO) satellites, Medium Earth Orbit (MEO) satellites, and Inclined Geosynchronous Satellite Orbit (IGSO) satellites. The BDS constellation will have 35 satellites in orbit to provide global open services according to its development schedule.
doi:10.1109/ursigass.2014.6929050 fatcat:6s5eqlzg5jhxxd6zowf4eqsvvi