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List of foreign satellites launched by India. India has launched 209 satellites for 28 different countries. Commercial launches for foreign nations are negotiated through Antrix, the commercial arm of the Indian Space Research Organization (ISRO).
Currently, a total of 31 GPS satellites orbit the earth twice a day. 1959 The Navy built the first real satellite navigation system, which it called TRANSIT. The system was designed to locate submarines, and started out with six satellites and eventually grew to ten. The subs often had to wait hours to receive signals from the satellites, but the model set the stage for true GPS with continuous signaling from satellites in space.