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The competition heats up: India has successfully launched the sixth satellite in its own GPS constellation. using its PSLV rocket.
They will complete the GPS constellation with a seventh satellite launch in April. The system however is already functioning, as it only needs a minimum of four satellites to work. Unlike the U.S. 24 satellite system, which is designed to be global, India’s system is regional with its focus centered over India itself. This is why they do not need as many satellites for it to function effectively.