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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 Minnaert function ： ウィキペディア英語版 Minnaert function The Minnaert function is a photometric function used to interpret astronomical observations 〔http://dx.doi.org/10.1016/S0019-1035(03)00075-7〕〔http://dx.doi.org/10.1016/j.icarus.2006.05.006〕 and remote sensing data for the Earth.〔http://dx.doi.org/10.1080/01431160500104194〕 This function expresses the radiance factor (RADF) as a function the phase angle ($\backslash alpha$) and the photometric latitude ($\backslash varphi$) and the photometric longitude ($\backslash lambda$). :$$ \text = \frac = \pi~A_M~\mu_0^k~\mu^ where $A\_M$ is the Minnaert albedo, $k$ is an empirical parameter, $I$ is the scattered radiance in the direction $(\backslash alpha,\backslash varphi,\backslash lambda)$, $\backslash pi\; F$ is the incident radiance, and :$$ \mu_0 = \cos\varphi~\cos(\alpha-\lambda) ~;~~ \mu = \cos\varphi~\cos\lambda ~. The phase angle is the angle between the light source and the observer with the object as the center. The assumptions made are: * the surface is illuminated by a distant point source. * the surface is isotropic and flat. Minnaert's contribution is the introduction of the parameter $k$, having a value between 0 and 1,〔http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1941ApJ....93..403M&data_type=PDF_HIGH&whole_paper=YES&type=PRINTER&filetype=.pdf〕 originally for a better interpretation of observations of the Moon. In remote sensing the use of this function is referred to as ''Minnaert topographic correction'', a necessity when interpreting images of rough terrain. == References == 〔 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「Minnaert function」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.