ipeutils-akmich 0.1.0

Calculation of amplitude spectra of seismic signals. Part of the 'ipeutils' collection of utilities for processing seismic data at the Institute of Physics of the Earth, Masaryk University.

akmich - Amplitude Spectral Characteristics

AKMICH - Amplitudová KMItočtová CHarakteristika

This module provides functions for calculating amplitude spectral characteristics of seismic signals, such as Fourier Amplitude Spectrum (FAS) and Amplitude Spectral Density (ASD). It also includes functions for smoothing the spectra using the Konno-Ohmachi method.

Functions

• FAS(data, delta): Calculates the Fourier Amplitude Spectrum (FAS) of a 1D data vector with a given sampling interval.
• ASD(data, delta): Calculates the Amplitude Spectral Density (ASD) of a 1D data vector with a given sampling interval.
• CSD(data1, data2, delta): Calculates the Cross Spectral Density (CSD) between two 1D data vectors with a given sampling interval.
• trFAS(tr): Calculates the FAS from an ObsPy Trace object.
• trASD(tr): Calculates the ASD from an ObsPy Trace object.
• ko_smoothing(lfreq, famps, amps, b=40.0): Smooths the spectrum using the Konno-Ohmachi method with a specified smoothing parameter b.
• koc_smoothing(lfreq, famps, amps, b=40.0): Smooths the spectrum with compensation for shift using the Konno-Ohmachi method.

Note

Consider that the trFAS and trASD functions multiply the signal samples by the Trace.stats.calib value before calculating the spectra. Make sure calib has the correct value (calib = 1.0 if calibration has been done before). If you want to calculate the spectra without this calibration, you can directly use the FAS and ASD functions with the raw data from the Trace object.

Usage

To use the functions in this module, you can import it and call the desired function with the appropriate parameters. For example:

from ipeutils.akmich import FAS, ASD, trFAS, trASD, ko_smoothing, koc_smoothing

Make sure to have the ObsPy library installed to work with Trace objects. You can install it using pip:

pip install obspy

License

This module is provided under the MIT License. See the LICENSE file for more details.