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Beidou 3 M1



This marked the second launch in the Beidou-3 program, the third phase of the country's Navigation Satellite Program that started in 2000 with regional coverage over China and was expanded in 2009 to deliver services in the broader Asia-Pacific Region before the inauguration of the Global Navigation Satellite System which is expected to be fully operational by 2020 consisting of 35 satellites in Medium Earth Orbit, Geostationary Orbit and inclined Geosynchronous Orbits. The Beidou-3 program saw its first launch in June when the first IGSO satellite was launched, also marking the first flight of the YZ-1 stage.

According to CAST, the Beidou-3 MEO satellites use a newly developed satellite bus measuring 2.25 by 1.0 by 2.2 meters in size with a mass of 1,014 Kilograms using a number of heritage components from the DFH-3 bus to match its capabilities and reduce risk. The MEO satellites can carry a payload of up to 280 Kilograms dedicated to the Radio Navigation Satellite Service RNSS.

The Radio Navigation Satellite Service payload uses ultra stable timing signals delivered by an atomic clock to generate L-band signals that are transmitted through an antenna array. Receivers on the ground use signals from multiple satellites to calculate their position. This system works on the same principle as GPS and Galileo using similar frequency bands.

Alternate Names

  • 43001
  • Beidou3M1

Facts in Brief

Launch Date: 2017-11-05
Launch Vehicle: Long March 3B/E+YZ-1
Launch Site: Xichang, Peoples Republic of China

Funding Agency

  • Unknown (Peoples Republic of China)


  • Navigation/Global Positioning

Additional Information

Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office

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