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Universal Space Network Inc (USN) is an American company specializing in tracking, telemetry, and control of spacecraft.
It is a subsidiary of Swedish Space Corporation (SSC), with four main sites and cooperative agreements with many others. USN has been used by commercial satellite operations such as Sirius XM Radio and scientific missions both in low earth orbit (such as GALEX) and in orbit around the moon (such as Lunar Reconnaissance Orbiter and GRAIL).
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