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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 Geophysical survey ： ウィキペディア英語版 Geophysical survey Geophysical survey is the systematic collection of geophysical data for spatial studies. Geophysical surveys may use a great variety of sensing instruments, and data may be collected from above or below the Earth's surface or from aerial, orbital, or marine platforms. Geophysical surveys have many applications in geology, archaeology, mineral and energy exploration, oceanography, and engineering. Geophysical surveys are used in industry as well as for academic research. The sensing instruments such as gravimeter, gravitational wave sensor and magnetometers detect fluctuations in the gravitational and magnetic field. The data collected from a geophysical survey is analysed to draw meaningful conclusions out of that. Analysing the spectral density and the time-frequency localisation of any signal is important in applications such as oil exploration and seismography. ==Types of geophysical survey== There are many methods and types of instrumentation used in geophysical surveys. Technologies used for geophysical surveys include: # Seismic methods, such as reflection seismology, seismic refraction, and seismic tomography. # Seismoelectrical method # Geodesy and gravity techniques, including gravimetry and gravity gradiometry. # Magnetic techniques, including aeromagnetic surveys and magnetometers. # Electrical techniques, including electrical resistivity tomography, induced polarization and spontaneous potential. # Electromagnetic methods, such as magnetotellurics, ground penetrating radar and transient/time-domain electromagnetics, magnetic resonance sounding (MRS).〔(Geophysical Applications of Magnetic Resonance Sounding (MRS) ). USGS Groundwater Information: Branch of Geophysics. Jan 2013.〕 # Borehole geophysics, also called well logging. # Remote sensing techniques, including hyperspectral. 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「Geophysical survey」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.