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A Satellite contribution link or service is a means to transport video programming by a satellite link from a remote source (such as an outside broadcast unit) to a broadcaster's studio or from the studio to a satellite TV uplink centre (for onward distribution by DTH, cable etc.). Such contribution links are often made by terrestrial connections (landline, fibre, etc.) but the use of a satellite "hop" provides advantages in some situations. Satellite operators and third party agencies provide satellite contribution links for the occasional or regular use of the client broadcasters. ==Advantages== In remote locations, using terrestrial links such as fibre is prohibitively expensive whereas satellite can cheaply and easily overcome the "first-mile" connectivity gaps in rural and other remote areas. A comparable fibre service would have to use extremely diverse routing to achieve the same availability. A single satellite link can span a huge distance that would take a terrestrial link through many countries and commercial operators. The satellite operator provides a single point of accountability whereas establishing a link and resolving service interruptions with fibre can prove difficult, especially across national borders and with multiple carriers. Duplication of active components in the transmission and reception sites, and in-orbit backup satellite capacity provides a fully redundant contribution connection. Monitoring of the signal allows for fast and effective changes before problems affect the service. E.g. uplink power may be automatically increased during adverse weather conditions. SES provides an example service that provides permanent delivery of live and recorded TV and radio signals to the company's Luxembourg uplink facility (used for 15 satellites, serving over 120 million viewers〔''ASTRA Infobooklet'' SES ASTRA. March 2009. Company facts compedium〕) from almost any location across Europe.〔SES ASTRA ''Ka-band Contribution Service'' (August 2008). Company factsheet〕 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「Satellite contribution」の詳細全文を読む スポンサード リンク
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