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Zero crossings are calculated to derive only P pulse for calculating source spectrum.

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This commit is contained in:
Ludger Küperkoch 2015-09-29 11:15:51 +02:00
parent 5b8e2da59e
commit 8035903fa5
1 changed files with 27 additions and 16 deletions
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43
pylot/core/pick/autopick.py
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@ -313,7 +313,6 @@ def autopickstation(wfstream, pickparam):
############################################################## ##############################################################
# get DC value (w0) and corner frequency (fc) of source spectrum # get DC value (w0) and corner frequency (fc) of source spectrum
# from P pulse # from P pulse
# restitute streams
# initialize Data object # initialize Data object
data = Data() data = Data()
[corzdat, restflag] = data.restituteWFData(invdir, zdat) [corzdat, restflag] = data.restituteWFData(invdir, zdat)
@ -323,33 +322,45 @@ def autopickstation(wfstream, pickparam):
# class needs stream object => build it # class needs stream object => build it
z_copy = zdat.copy() z_copy = zdat.copy()
z_copy[0].data = corintzdat z_copy[0].data = corintzdat
# calculate source spectrum and get w0 and fc # largest detectable period == window length
calcwin = 1 / bpz2[0] # largest detectable period == window length # after P pulse for calculating source spectrum
# around P pulse for calculating source spectrum winzc = (1 / bpz2[0]) * z_copy[0].stats.sampling_rate
specpara = DCfc(z_copy, mpickP, calcwin, iplot) impickP = mpickP * z_copy[0].stats.sampling_rate
w0 = specpara.getw0() wfzc = z_copy[0].data[impickP : impickP + winzc]
fc = specpara.getfc() # calculate spectrum using only first cycles of
# waveform after P onset!
zc = crossings_nonzero_all(wfzc)
if np.size(zc) == 0:
print ("Something is wrong with the waveform, " \
"no zero crossings derived!")
print ("Cannot calculate source spectrum!")
else:
calcwin = (zc[3] - zc[0]) * z_copy[0].stats.delta
# calculate source spectrum and get w0 and fc
specpara = DCfc(z_copy, mpickP, calcwin, iplot)
w0 = specpara.getw0()
fc = specpara.getfc()
print 'autopickstation: P-weight: %d, SNR: %f, SNR[dB]: %f, ' \ print ("autopickstation: P-weight: %d, SNR: %f, SNR[dB]: %f, " \
'Polarity: %s' % (Pweight, SNRP, SNRPdB, FM) "Polarity: %s" % (Pweight, SNRP, SNRPdB, FM))
Sflag = 1 Sflag = 1
else: else:
print 'Bad initial (AIC) P-pick, skipping this onset!' print ("Bad initial (AIC) P-pick, skipping this onset!")
print 'AIC-SNR=', aicpick.getSNR(), 'AIC-Slope=', aicpick.getSlope(), 'counts/s' print 'AIC-SNR=', aicpick.getSNR(), 'AIC-Slope=', aicpick.getSlope(), 'counts/s'
print '(min. AIC-SNR=', minAICPSNR, ', min. AIC-Slope=', minAICPslope, 'counts/s)' print '(min. AIC-SNR=', minAICPSNR, ', min. AIC-Slope=', minAICPslope, 'counts/s)'
Sflag = 0 Sflag = 0
else: else:
print 'autopickstation: No vertical component data available!, ' \ print ("autopickstation: No vertical component data available!, " \
'Skipping station!' "Skipping station!")
if edat is not None and ndat is not None and len(edat) > 0 and len( if edat is not None and ndat is not None and len(edat) > 0 and len(
ndat) > 0 and Pweight < 4: ndat) > 0 and Pweight < 4:
print 'Go on picking S onset ...' print ("Go on picking S onset ...")
print '##################################################' print ("##################################################")
print 'Working on S onset of station %s' % edat[0].stats.station print ("Working on S onset of station %s" % edat[0].stats.station)
print 'Filtering horizontal traces ...' print ("Filtering horizontal traces ...")
# determine time window for calculating CF after P onset # determine time window for calculating CF after P onset
cuttimesh = [round(max([mpickP + sstart, 0])), cuttimesh = [round(max([mpickP + sstart, 0])),