翻訳と辞書 Words near each other ・ Satellite delay ・ Satellite digital imaging system ・ Satellite dish ・ Satellite Distribution System ・ Satellite DNA ・ Satellite emergency notification device ・ Satellite EP ・ Satellite FC ・ Satellite FC Abidjan ・ Satellite finder ・ Satellite flare ・ Satellite formation flying ・ Satellite galaxies of the Milky Way ・ Satellite galaxy ・ Satellite geodesy ・ Satellite geolocation ・ Satellite glial cell ・ Satellite High School ・ Satellite Home Viewer Act ・ Satellite Home Viewer Reauthorization Act ・ Satellite Image Time Series ・ Satellite imagery ・ Satellite in the Sky ・ Satellite Information Services ・ Satellite Instructional Television Experiment ・ Satellite insurance ・ Satellite Internet access ・ Satellite IRG ・ Satellite Island ・ Satellite Island (Tasmania) Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Satellite geolocation ： ウィキペディア英語版 Satellite geolocation Satellite geolocation is the process of locating the origin of a signal appearing on a satellite communication channel. Typically, this process is used to mitigate interference on communication satellites. Usually, these interference signals are caused by human error or equipment failure, but can also be caused by deliberate jamming. Identifying the geographical location of an interfering signal informs the mitigation activity. ==How Satellite Geolocation Works== Many communication satellites share a given frequency band. As a signal is transmitted to a particular satellite there is some amount of side lobe or spillover energy that is transmitted to adjacent satellites. At a receive station that has two antennas, one pointed at the primary satellite (the satellite the signal is intended for) and a secondary satellite (a satellite that is receiving side lobe energy), both paths of the signal are received and measured. From a comparison of those paths, two measurements can be made: Differential Time Offset (DTO) and Differential Frequency Offset (DFO). These measurements are often implemented through correlation processing. DTO represents the difference in time that it takes the signal to travel through the two satellites, while DFO represents the difference in frequency the received signals present through the two satellites. The frequency differences observed are due to different Doppler shift resulting from relative satellite motion and differences in the translation frequencies of the two satellite channels. Channel translation frequencies and downlink Doppler shift and delay can be calibrated out of the measurements by observing transmitters of known location simultaneously on the channels. This leaves the uplink DTO and DFO as the observables. See 'Reference Signals' below. 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 geolocation」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.