China on welcomed the Asian countries to use its home grown BeiDou Navigation System for navigation system for free on 27th December. China is intended to widen the use of its home grown BeiDou Navigation System, which already has 16 satellites. China is keen to develop BeiDou satellite as an alternative to the American Global Positioning System (GPS) and Russian GLONASS.
GPS has been active since the 1970s and has satellites in orbit. The satellites have been operating for more than two decades. BeiDou launched the first of its current generation satellites only five years ago.GPS (Global Positioning System) comprises 30 satellites, while BeiDou already has over sixteen and is going to have another forty in orbit by the time the network is complete in 2020, at a cost of another 6 billion dollar. The greater the number of satellites, the easier it is for the system to calculate location, time and velocity of moving objects.
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