Surface Wave EGF/CF Phase Velocity Dipersion Analysis Software.
The software can do individual, semiautomated or automated phase velocity dispersion measurements.
by Huajian Yao, USTC
Using the Automatic mode, the program can automatically pick the dispersion curves using a simple algorithm and save the dispersion images. The dispersion images can be input to DisperPicker to automatically pick the dispersion curves. Please read Yang et al. (2022) for details.
There is an example in the Feidong_disp folder.
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Run
EGFAnalysisTimeFreq.m -
The parameters I used is saved as
fd_config.png -
After selecting the parameters, click the
Start Processingbutton to start saving the dispersion files.
For other details, please refer to EGFAnalysisTimeFreq_Manual.pdf
The dispersion image file is a 701x49 matrix and saved in dat format. The velocity range we set is 0.5-4 km/s and the step is 0.005 km/s. The period range is 0.2-5 s with a step of 0.1 s.
Yang, S., Zhang, H., Gu, N., Gao, J., Xu, J., Jin, J., Li, J., and Yao H. (2022). Automatically Extracting Surface Wave Group and Phase Velocity Dispersion Curves from Dispersion Spectrograms Using a Convolutional Neural Network. Seismological Research Letters, doi: https://doi.org/10.1785/0220210280.