SPHASEPICKER is a powerful tool for automatically picking S-phase onsets with high precision without requiring detection interval or threshold settings. The algorithm detects S-phase onset in single-component acceleration or broadband velocity records using the histogram method. It also computes signal-to-noise ratio (SNR).
A demo file is provided in zip file to show how to run SPHASEPICKER using a sample waveform. For your intended application, filter corner frequencies may need to be updated based on the frequency content of the input record.
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For questions / suggestions / comments and bug reports: firstname.lastname@example.org
Dr. Erol Kalkan, P.E. (2019). An Automated S-phase Arrival Time Picker with SNR Output (https://www.mathworks.com/matlabcentral/fileexchange/70343-an-automated-s-phase-arrival-time-picker-with-snr-output), MATLAB Central File Exchange. Retrieved .
Picking algorithm is optimized for speed and accuracy, full debug option is added to plot two additional figures, notes updated. This version is more stable.
Added the missing integration function
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