翻訳と辞書 Words near each other ・ Earth and Beyond (Doctor Who) ・ Earth and Fire ・ Earth and High Heaven ・ Earth and Man National Museum ・ Earth and Planetary Science Letters ・ Earth and Sky ・ Earth and Sun and Moon ・ Earth and water ・ Earth Angel ・ Earth anthem ・ Earth Anthem (Abhay Kumar song) ・ Earth Awakens ・ Earth battery ・ Earth Beams ・ Earth block ・ Earth bulge ・ Earth Centre, Doncaster ・ Earth Changes ・ Earth Charter ・ Earth Charter Initiative ・ Earth chestnut ・ Earth Citizen ・ Earth City, Missouri ・ Earth clock ・ Earth Condemnation Group Yuumajuu ・ Earth Crisis ・ Earth Crisis (album) ・ Earth crust displacement ・ Earth Dances ・ Earth Day 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 Earth bulge ： ウィキペディア英語版 Earth bulge Earth bulge is a term used in telecommunications. It refers to the circular segment of earth profile which blocks off long distance communications. == Distance to horizon == Assuming a perfect sphere with no terrain irregularity, the distance to horizon from a high altitude transmitter (i.e. line of sight) can readily be calculated. Let R be the radius of Earth and h be the altitude of a telecommunication station. Line of sight distance d of this station is given by the Pythagorean theorem; : $d^2=(R+h)^-R^2=\; 2\backslash cdot\; R\; \backslash cdot\; h\; +h^2$ Since the altitude of the station is much less than the radius of the Earth, : $d\; \backslash approx\; \backslash sqrt$ The mean radius of the earth is about . (See Earth radius) Using the same units for both the altitude of the station and the radius of the earth, : $d\; \backslash approx\; \backslash sqrt\; \backslash approx\; 112.9\; \backslash cdot\; \backslash sqrt$ If the height is given in m. and distance in km. : $d\; \backslash approx\; 3.57\; \backslash cdot\; \backslash sqrt$ If the height is given in ft. and the distance in miles, : $d\; \backslash approx\; 1.23\; \backslash cdot\; \backslash sqrt$ 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「Earth bulge」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.