China has recently completed its BeiDou Navigation Satellite System constellation.
The system uses a network of satellites and can provide positional accuracies of fewer than ten metres (GPS provides positioning accuracies of fewer than 2.2 metres).
BeiDou offers services including accurate positioning, navigation and timing as well as short message communication.
It consists of 27 satellites in medium Earth orbit, five in geostationary orbit and three more in inclined geosynchronous orbits.
The GPS is owned by the US government and operated by the US Air Force.
Russia has its navigation system called GLONASS.
The European Union (EU) has Galileo.
India’s navigation system is called Navigation with Indian Constellation (NavIC).
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