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Last update: doc. RNDr. Jan Vilhelm, CSc. (31.03.2023)
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Last update: doc. RNDr. Jan Vilhelm, CSc. (31.03.2023)
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Last update: doc. RNDr. Jan Vilhelm, CSc. (31.03.2023)
Processing of seismic signals 1. Basics of seismic signal processing. Seismic signal. Fourier transform and its properties, convolution and correlation. Frequency spectrum properties. 2. Frequency analysis of time-varying signal. Short Fourier transform, Wavelet transform. 3. Analysis of complex seismic trace. 4. Polarization analysis. 5. Filtering of seismic signals, filters. Single-channel filtering: Filtering of signal of known shape, correlation filters, the correlation in the Vibroseis method. 6. Single channel filtering - continued: inverse filters, optimal Wiener filters, deconvolution. 7. Multichannel filtering, two-dimensional Fourier transform, two-dimensional spectrum of a multi-channel seismic recording, two-dimensional discrete Fourier transform, the apparent velocity in two-dimensional spectrum, two-dimensional correlation. 8. Optimal multi-channel filtering, summation of plane waves, the use of "semblance". 9. Seismic migration. Ray migration, migration by diffraction summation, wave-form migration. 10. Seismic tomography. 11. Surface waves and their use in shallow seismic survey. The velocity dispersion and the dispersion curve - basic examples. 12. Resolution and applicability of seismic methods. |