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[bugfix] determination of zero crossings breaks down if data is not demeaned in the signal window (explicitly demeaning data in the signal window when determining the zero crossings)

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Sebastian Wehling-Benatelli 2015-06-22 10:52:26 +02:00
parent a95caa5efc
commit 864ef6c64d
1 changed files with 10 additions and 10 deletions
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4
pylot/core/pick/utils.py
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@ -65,8 +65,8 @@ def earllatepicker(X, nfac, TSNR, Pick1, iplot=None):
#get earliest possible pick #get earliest possible pick
#determine all zero crossings in signal window #determine all zero crossings in signal window (demeaned)
zc = crossings_nonzero_all(x[isignal]) zc = crossings_nonzero_all(x[isignal] - x[isignal].mean())
#calculate mean half period T0 of signal as the average of the #calculate mean half period T0 of signal as the average of the
T0 = np.mean(np.diff(zc)) * X[0].stats.delta #this is half wave length! T0 = np.mean(np.diff(zc)) * X[0].stats.delta #this is half wave length!
#T0/4 is assumed as time difference between most likely and earliest possible pick! #T0/4 is assumed as time difference between most likely and earliest possible pick!