BeiDou Navigation Satellite System

Explanation :

• China has completed its BeiDou Navigation Satellite System constellation, coming up with a product that can potentially rival the US Global Positioning System (GPS).
• China initiated BeiDou in 1994 with aims to integrate its application in different sectors, including fishery, agriculture, special care, mass-market applications, forestry and public security.
• The name BeiDou comes from Chinese word for the Big Dipper or Plough constellation.
• It consists of 27 satellites in medium Earth orbit, five in geostationary orbit and three more in inclined geosynchronous orbits.
• The navigation satellite system was completed in three steps: BDS-1 which provided services to China, BDS- 2 to provide services to the Asia-Pacific region and BDS-3 which provides services worldwide.
• China’s navigation system uses a network of satellites and can provide positional accuracies of under ten meters (GPS provides positioning accuracies of under 2.2 meters).
• BeiDou offers services including accurate positioning, navigation and timing as well as short message communication.

Other Countries’ Navigation Systems

• The GPS is owned by the US government and operated by the US Air Force.
• Apart from this, Russia has its navigation system called GLONASS, the European Union (EU) has Galileo, while India’s is called Navigation with Indian Constellation (NavIC).