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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 European Data Relay System ： ウィキペディア英語版 European Data Relay System The European Data Relay System (EDRS) system is a planned European constellation of state of the art GEO satellites that will relay information and data between satellites, spacecraft, UAVs, and ground stations. The designers intend the system to provide almost full-time communication, even with satellites in Low Earth orbit that often have reduced visibility from ground stations. It will make on-demand data available to, for example, rescue workers who want near-real-time satellite data of a crisis region. The system is being developed as part of the ARTES 7 programme and is intended to be an independent, European satellite system that reduces time delays in the transmission of large quantities of data. The programme is similar to the American Tracking and Data Relay Satellite System that was set up to support the Space Shuttle—but EDRS will use a new generation Laser Communication Terminal (LCT) technology. The laser terminal transmits 1.8 Gbit/s across 45,000 km, the distance of a LEO-GEO link. Such a terminal was successfully tested during in-orbit verification between the German radar satellite TerraSAR-X and the American NFIRE satellite.〔(TerraSAR-X NFIRE test )〕 It is also embarked on the commercial telecommunication satellite Alphasat to perform further system- and operational service demonstrations and in the operational sentinel satellites part of the European Copernicus Programme.〔(Alphasat )〕 == Network == EDRS infrastructure will consist of two geostationary payloads (two further payloads are in the planning stage), a ground system consisting of a satellite control centre, a mission and operations centre, a feeder link ground station (FLGS), and data ground stations. 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「European Data Relay System」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.