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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 Focal Plane Arrays ： ウィキペディア英語版 Focal Plane Arrays Focal Plane Arrays are arrays of receivers placed at the focus of a radio-telescope. Traditional radio-telescopes have only one receiver at the focus of the telescope, but radio-telescopes are now starting to be equipped with focal plane arrays, which are of three different types: multi-beam feed arrays, bolometer arrays, and the experimental phased-array feeds. ==Multi-beam feed arrays== Multi-beam feed arrays consist of a small array of feed horns at the focus of a radio-telescope. Each feed horn is connected to a receiver to measure the received power and each horn and receiver pair is sensitive to radio waves from a slightly different direction in the sky. A feed array with n receivers will increase the survey speed of the telescope by a factor n, making them very powerful survey instruments. Because radio wavelengths are large, the resulting feed arrays are amongst the largest radio-astronomy receivers ever built. Examples include the multi-beam arrays 〔(Parkes Multibeam )〕〔(The Parkes methanol multibeam survey )〕 on the Parkes Observatory, and the ALFA 〔(ALFA )〕 array at Arecibo Observatory, both of which have been used for major pulsar and Hydrogen line studies, such as HIPASS. 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「Focal Plane Arrays」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.