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L04_GravAnalysisExamples-page8

L04_GravAnalysisExamples-page8 - • Upward continuation...

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Applied Geophysics – Analysis and examples Wave number domain Wavelength filtering 1. Fourier transform the data: f(x,y) Î F(k x ,k y ) 2. set high and low wavelengths to zero: F’(k x ,k y ) 3. Fourier transform back: F’(k x ,k y ) Î f’(x,y) F’ F k k Applied Geophysics – Analysis and examples Continuation filters This project the potential field to either higher or lower elevations
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Unformatted text preview: • Upward continuation – enhances deeper sources • Downward continuation – enhances shallow sources Derivative filters • Enhance shallow anomalies • Used to find edges of anomalies For shallow bodies with vertical edges the max horizontal gradient will occur over the edge...
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