NDLI: Seismic attenuation values obtained from instantaneous frequency matching and spectral ratios, Geophys (1995)

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Seismic attenuation values obtained from instantaneous frequency matching and spectral ratios, Geophys (1995)

Content Provider	CiteSeerX
Author	Matheney, Michael P. Nowack, Robert L.
Abstract	In this paper, attenuation values are obtained from seismic data using instantaneous-frequency matching and spectral ratios. To obtain differential t * values using instan-taneous-frequency matching, a near offset reference pulse is attenuated until the resulting instantaneous frequency matches the observed value at the receiver. Prior to matching, filtering can be applied to each trace in order to reduce the effects of noise on the calculated instantaneous frequencies. In the second method, the spectral ratio between a receiver pulse and a reference pulse is used to obtain differential t * values. To obtain an unbiased estimate, a variable spectral bandwidth is used depending on the noise level of the data. The two methods are tested using synthetic traces and then applied to crustal refraction data from the 1986 PASSCAL Ouachita experiment. Results show that the differential t * values obtained using filtered, instantaneous-frequency matching are consistent with and have less scatter than those obtained from spectral ratios with a variable bandwidth. Key words: instantaneous frequency, seismic attenuation, spectral ratios.
File Format	PDF
Journal	J . Int
Language	English
Publisher Date	1995-01-01
Access Restriction	Open
Subject Keyword	Spectral Ratio Seismic Attenuation Value Differential Value Instantaneous Frequency Matching Instantaneous-frequency Matching Instantaneous Frequency Second Method Passcal Ouachita Experiment Crustal Refraction Data Noise Level Receiver Pulse Seismic Data Instan-taneous-frequency Matching Synthetic Trace Reference Pulse Seismic Attenuation Variable Spectral Bandwidth Attenuation Value Unbiased Estimate Variable Bandwidth Observed Value Key Word Near Offset Reference Pulse Calculated Instantaneous Frequency
Content Type	Text
Resource Type	Article

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