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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Co-location (satellite) ： ウィキペディア英語版 Co-location (satellite) Co-location is the placing of two or more geostationary communications satellites in orbit, in close proximity so that to reception equipment on the ground they 'appear' to occupy a single orbital position. The technique as applied to a group of TV satellites from a single operator was pioneered by SES with the Astra satellites at 19.2°E.〔''High Above - The untold story of Astra, Europe's leading satellite company'' Broadgate Publications April 2010〕 ==Satellite separation== Communications satellites' orbital positions are normally spaced apart along the geostationary orbit to provide for frequency reuse for both uplink and downlink transmissions. By separating adjacent satellites by a distance greater than the at-orbit beamwidth of the uplink antennas, the same carrier frequencies can be used to uplink to both satellites without interference. Similarly, a sufficient separation so that the beamwidth of the receiving dishes on the ground can distinguish one satellite from its neighbours, allows the same frequency spectrum to be used for adjacent satellite downlinks. Communications satellites are positioned in orbital 'slots' allocated under international treaty by the ITU and a separation between slots of 2° or 3° of orbital longitude is common.〔Luis Germán Aponte Reyes, Shen Shi Tuan and Tan Zhan Zhong ''A Study for an Adaptive Anti-Jamming Antenna for the User Receiver of the GEO Satellite Communication System'' IACSIT Press, Singapore 2011〕 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「Co-location (satellite)」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.