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Changed earllatepicker. If EPick = Nan, signal window is doubled.

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This commit is contained in:
Marcel Paffrath 2015-09-22 11:58:43 +02:00
parent 130dc8db4e
commit dedf6eff00
1 changed files with 20 additions and 6 deletions
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14
pylot/core/pick/utils.py
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@ -68,12 +68,26 @@ def earllatepicker(X, nfac, TSNR, Pick1, iplot=None):
# get earliest possible pick
EPick = np.nan
while np.isnan(EPick):
# determine all zero crossings in signal window (demeaned)
zc = crossings_nonzero_all(x[isignal] - x[isignal].mean())
# 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!
# T0/4 is assumed as time difference between most likely and earliest possible pick!
EPick = Pick1 - T0 / 2
if np.isnan(EPick):
print "earllatepicker: Doubled signal window size because of NaN for earliest pick."
isigDoubleWinStart = isignal[-1] + 1
isignalDoubleWin = np.arange(isigDoubleWinStart, isigDoubleWinStart + len(isignal))
if (isigDoubleWinStart + len(isignal)) < X[0].data.size:
isignal = np.concatenate((isignal, isignalDoubleWin))
else:
isignalDoubleWin = np.arange(isigDoubleWinStart, X[0].data.size)
isignal = np.concatenate((isignal, isignalDoubleWin))
print "Could not double signal window. Index out of bounds."
break
# get symmetric pick error as mean from earliest and latest possible pick
# by weighting latest possible pick two times earliest possible pick