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New function iteratepicker for iterative picking.

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This commit is contained in:
Ludger Küperkoch 2015-11-20 15:51:22 +01:00
parent 734eca30db
commit 07bbc2926e
1 changed files with 75 additions and 4 deletions
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79
pylot/core/pick/autopick.py
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@ -3,7 +3,7 @@
"""
Function to run automated picking algorithms using AIC,
HOS and AR prediction. Uses object CharFuns and Picker and
HOS and AR prediction. Uses objects CharFuns and Picker and
function conglomerate utils.
:author: MAGS2 EP3 working group / Ludger Kueperkoch
@ -16,6 +16,7 @@ from pylot.core.pick.Picker import AICPicker, PragPicker
from pylot.core.pick.CharFuns import HOScf, AICcf, ARZcf, ARHcf, AR3Ccf
from pylot.core.pick.utils import checksignallength, checkZ4S, earllatepicker,\
getSNR, fmpicker, checkPonsets, wadaticheck, crossings_nonzero_all
from pylot.core.util.utils import getPatternLine
from pylot.core.read.data import Data
from pylot.core.analysis.magnitude import WApp, DCfc
@ -316,12 +317,11 @@ def autopickstation(wfstream, pickparam):
# from P pulse
# initialize Data object
data = Data()
[corzdat, restflag] = data.restituteWFData(invdir, zdat)
z_copy = zdat.copy()
[corzdat, restflag] = data.restituteWFData(invdir, z_copy)
if restflag == 1:
# integrate to displacement
corintzdat = integrate.cumtrapz(corzdat[0], None, corzdat[0].stats.delta)
# class needs stream object => build it
z_copy = zdat.copy()
z_copy[0].data = corintzdat
# largest detectable period == window length
# after P pulse for calculating source spectrum
@ -799,3 +799,74 @@ def autopickstation(wfstream, pickparam):
picks[phase]['Ao'] = Ao
return picks
def iteratepicker(wf, NLLocfile, picks, badpicks, pickparameter):
'''
Repicking of bad onsets. Uses theoretical onset times from NLLoc-location file.
:param wf: waveform, obspy stream object
:param NLLocfile: path/name of NLLoc-location file
:param picks: dictionary of available onset times
:param badpicks: picks to be repicked
:param pickparameter: picking parameters from autoPyLoT-input file
'''
newpicks = {}
for i in range(0, len(badpicks)):
if len(badpicks[i][0]) > 4:
Ppattern = '%s ? ? ? P' % badpicks[i][0]
elif len(badpicks[i][0]) == 4:
Ppattern = '%s ? ? ? P' % badpicks[i][0]
elif len(badpicks[i][0]) < 4:
Ppattern = '%s ? ? ? P' % badpicks[i][0]
nllocline = getPatternLine(NLLocfile, Ppattern)
res = nllocline.split(None)[16]
# get theoretical P-onset time from residuum
badpicks[i][1] = picks[badpicks[i][0]]['P']['mpp'] - float(res)
# get corresponding waveform stream
wf2pick = wf.select(station=badpicks[i][0])
# modify some picking parameters
pstart_old = pickparameter.getParam('pstart')
pstop_old = pickparameter.getParam('pstop')
pickwinP_old = pickparameter.getParam('pickwinP')
Precalcwin_old = pickparameter.getParam('Precalcwin')
pickparameter.setParam(pstart=badpicks[i][1] - wf2pick[0].stats.starttime \
- pickparameter.getParam('tlta'))
pickparameter.setParam(pstop=pickparameter.getParam('pstart') + \
(3 * pickparameter.getParam('tlta')))
pickparameter.setParam(pickwinP=pickparameter.getParam('pickwinP') / 2)
pickparameter.setParam(Precalcwin=pickparameter.getParam('Precalcwin') / 2)
pickparameter.setParam(iplot=2)
print("iteratepicker: The following picking parameters have been modified for iterative picking:")
print("pstart: %fs => %fs" % (pstart_old, pickparameter.getParam('pstart')))
print("pstop: %fs => %fs" % (pstop_old, pickparameter.getParam('pstop')))
print("pickwinP: %fs => %fs" % (pickwinP_old, pickparameter.getParam('pickwinP')))
print("Precalcwin: %fs => %fs" % (Precalcwin_old, pickparameter.getParam('Precalcwin')))
# repick station
newpicks = autopickstation(wf2pick, pickparameter)
# replace old dictionary with new one
picks[badpicks[i][0]] = newpicks
# reset temporary change of picking parameters
print("iteratepicker: Resetting picking parameters ...")
pickparameter.setParam(pstart=pstart_old)
pickparameter.setParam(pstop=pstop_old)
pickparameter.setParam(pickwinP=pickwinP_old)
pickparameter.setParam(Precalcwin=Precalcwin_old)
return picks