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Astra 3A is one of the Astra communications satellites owned and operated by SES, launched in 2002 to the Astra 23.5°E orbital slot to provide digital television and radio for DTH and cable, multimedia and interactive services, corporate networks, and occasional and other business services to central Europe. The satellite provides two broadcast beams, of horizontal and vertical polarisation, across two footprints that covered essentially the same areas of Europe – principally the countries of central Europe.〔(【引用サイトリンク】title=Astra 3A )〕 Astra 3A was launched to provide follow-on capacity to replace the DFS-Kopernikus 3 satellite and deliver additional capacity for the Benelux countries and central Europe, to create SES-Astra’s third major European satellite hotspot after Astra 19.2°E and Astra 28.2°E with access to channels at both positions using a single dish fitted with a monoblock Duo LNB. In that role, TV signals could be received with a 50 cm dish across Germany, Austria, Switzerland, Belgium, the Netherlands, Luxembourg, the Czech Republic, most of Denmark, and in parts of France, Italy, Poland, Slovenia, and Slovakia. Reception was even possible as far afield as Scotland, Sweden and Serbia when a larger dish (around 110 cm) was used. In addition to contribution feeds and individual TV channels, Astra 3A carried pay-TV networks including Kabel Deutschland (Germany), CanalDigitaal (Netherlands), TV Vlaanderen (Belgium), CS Link (Slovakia and Czech Republic) and Skylink (Slovakia and Czech Republic). On February 1, 2012 Kabel Deutschland left Astra 3A and during 2012 other services were transferred off the satellite. As of October 2012, Astra 3A was in an inclined orbit〔(【引用サイトリンク】title=Astra 3A Key Data )〕 at 23.7°E〔(【引用サイトリンク】title=Astra 3A )〕 with all services carried by the adjacent Astra 3B craft. In November 2013, Astra 3A was moved to 177°W where it remains, in inclined orbit, to provide backup to SES' NSS-9 satellite.〔(Real Time Satellite Tracking And Predictions ) Accessed March 31, 2014〕 ==See also== *Astra 23.5°E former orbital position *SES satellite operator *Astra satellite family *Astra 3B replacement satellite *DFS-Kopernikus previous position holder 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「Astra 3A」の詳細全文を読む スポンサード リンク
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