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Digital Audio Radio Service (DARS) refers to any type of digital radio service. In the United States it is the official FCC term for digital radio services. The most popular type of DARS in the U.S. and Canada is SDARS: Satellite Digital Audio Radio Service, used by Sirius Satellite Radio and XM Satellite Radio. XM and Sirius both operate in the 2.3-GHz S band, from 2320 to 2345 MHz. Increasing the spectrum available for more services would be difficult, since unlike C-band and Ku band services, which allow over 200 locations for satellites, S-band satellites must be spaced too far apart for current technology. Existing vehicle antennas would not allow reception of two different stations on the same frequency, though new technology, requiring different receivers, might be possible.〔Bruce Elbert, "Satellite Radio – Accomplishments, Opportunities and Risks," ''SatMagazine.com'', March 2005, http://www.applicationstrategy.com/satellite_radio_ATSI.htm, Retrieved on 2008/05/07.〕 WorldSpace also operated a DARS network outside of the United States and Canada with a footprint covering Europe, Asia, the Middle East and Africa. It used the L-band. ==See also== * Digital audio * Digital Audio Broadcasting (DAB) * Direct broadcast satellite * Satellite radio 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Digital Audio Radio Service」の詳細全文を読む スポンサード リンク
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