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Sirius Satellite Radio-1, -2, -3, and -4 (CD Radio)

These four direct-broadcast service, Digital Audio Radio Satellites (DARS) were built for Sirius Satellite Radio (formerly CD Radio Inc.) for delivery of a new satellite-to-car, CD-quality, radio broadcast system across the continental United States. Three of these digital audio radio satellites now provide DARS commercial-free programs to vehicles equipped with Sirius's revolutionary new small antennas. The first three satellites were launched in 2000; the fourth serves as a backup.


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