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I am living in India. I want to work on Arduino Projects with GPS Modules. But only a few countries like US, Russia, China etc. have their own GPS satellites. India is working on it. So I am hesitating to buy GPS sensors. Can I work normally with GPS modules in my country as shown in Online projects in my country ?

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    GPS is US only. The Russian version is called GLONASS. The EU version is called Galileo. China version is called BeiDou/COMPASS (this one only works in and around china). PS the 'G' in GPS stands for Global, to indicate it works around the globe/world. – Gerben Aug 1 '15 at 14:28
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    GPS - anyone can use it anywhere that it works. Not so good nearer poles. Best choice for India. GLONASS - also can be used by anyone. Works best in Nortthern areas- satellites are in very elliptical orbits where they "hand high and slow" over top of northern hemisphere and are "kow and fast"in southern. – Russell McMahon Aug 2 '15 at 1:57
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Each of the countries listed has their own satnav system. GPS satellites cover the entire world and the US government allows anyone with a GPS receiver to use it, regardless of where on or above the surface they are located.

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