def test_readWrite(self):
"""
Tests for SacIO read and write
"""
sacfile = os.path.join(self.path, 'test.sac')
with NamedTemporaryFile() as tf:
tempfile = tf.name
t = SacIO()
t.ReadSacFile(sacfile)
self.assertEqual(t.GetHvalue('npts'), 100)
self.assertEqual(t.GetHvalue("kcmpnm"), "Q ")
self.assertEqual(t.GetHvalue("kstnm"), "STA ")
t.SetHvalue("kstnm", "spiff")
self.assertEqual(t.GetHvalue('kstnm'), 'spiff ')
t.WriteSacBinary(tempfile)
self.assertEqual(os.stat(sacfile)[6], os.stat(tempfile)[6])
self.assertEqual(os.path.exists(tempfile), True)
t.ReadSacHeader(tempfile)
self.assertEqual((t.hf is not None), True)
t.SetHvalue("kstnm", "spoff")
self.assertEqual(t.GetHvalue('kstnm'), 'spoff ')
t.WriteSacHeader(tempfile)
t.SetHvalueInFile(tempfile, "kcmpnm", 'Z ')
self.assertEqual(t.GetHvalueFromFile(tempfile, "kcmpnm"),
'Z ')
self.assertEqual(
SacIO(tempfile, headonly=True).GetHvalue('kcmpnm'), 'Z ')
self.assertEqual(t.IsValidSacFile(tempfile), True)
self.assertEqual(t.IsValidXYSacFile(tempfile), False)
self.assertEqual(SacIO().GetHvalueFromFile(sacfile, 'npts'), 100)
self.assertEqual(SacIO(sacfile).GetHvalue('npts'), 100)
def test_issue171(self):
"""
Test for issue #171.
"""
tr = read()[0]
with NamedTemporaryFile() as tf:
tempfile = tf.name
tr.write(tempfile, format="SAC")
trace = SacIO(tempfile)
trace.SetHvalue('stel', 91.0)
trace.WriteSacHeader(tempfile)
trace = SacIO(tempfile)
def test_readBigEnd(self):
"""
Test reading big endian binary files
"""
tfilel = os.path.join(os.path.dirname(__file__), 'data', 'test.sac')
tfileb = os.path.join(os.path.dirname(__file__), 'data',
'test.sac.swap')
tl = SacIO(tfilel)
tb = SacIO(tfileb)
self.assertEqual(tl.GetHvalue('kevnm'), tb.GetHvalue('kevnm'))
self.assertEqual(tl.GetHvalue('npts'), tb.GetHvalue('npts'))
self.assertEqual(tl.GetHvalue('delta'), tb.GetHvalue('delta'))
np.testing.assert_array_equal(tl.seis, tb.seis)
def test_readXYheader(self):
tfile = os.path.join(os.path.dirname(__file__), 'data', 'test.sac')
with NamedTemporaryFile() as tf:
tempfile = tf.name
t = SacIO(tfile)
t.WriteSacXY(tempfile)
d = SacIO(tempfile, alpha=True)
e = SacIO()
e.ReadSacXYHeader(tempfile)
self.assertEqual(e.GetHvalue('npts'), d.GetHvalue('npts'))
self.assertEqual(e.GetHvalue('depmen'), d.GetHvalue('depmen'))
self.assertEqual(e.starttime, d.starttime)
self.assertNotEqual(e.seis.size, d.seis.size)
c = SacIO(tempfile, alpha=True, headonly=True)
self.assertEqual(e.seis.size, c.seis.size)
def test_read_with_fsize(self):
"""
Testing fsize option on SacIO.ReadSacFile()
"""
# reading sac file with wrong file size should raise error
longer_file = os.path.join(self.path, 'seism-longer.sac')
shorter_file = os.path.join(self.path, 'seism-shorter.sac')
t = SacIO()
# default
self.assertRaises(SacError, t.ReadSacFile, longer_file)
self.assertRaises(SacError, t.ReadSacFile, shorter_file)
# fsize=True
self.assertRaises(SacError, t.ReadSacFile, longer_file, fsize=True)
self.assertRaises(SacError, t.ReadSacFile, shorter_file, fsize=True)
# using fsize=False should not work for shorter file
# (this is not supported by SAC) ...
self.assertRaises(SacIOError, t.ReadSacFile, shorter_file, fsize=False)
# ...but it should work for longer file
t.ReadSacFile(longer_file, fsize=False)
# checking trace
self.assertEqual(t.GetHvalue('nzyear'), 1981)
self.assertEqual(t.GetHvalue('nzjday'), 88)
self.assertEqual(t.GetHvalue('nzhour'), 10)
self.assertEqual(t.GetHvalue('nzmin'), 38)
self.assertEqual(t.GetHvalue('nzsec'), 14)
self.assertEqual(t.GetHvalue('nzmsec'), 0)
# we should never test equality for float values:
self.assertTrue(abs(t.GetHvalue('delta') - 0.01) <= 1e-9)
self.assertEqual(t.GetHvalue('scale'), -12345.0)
self.assertEqual(t.GetHvalue('npts'), 998)
self.assertEqual(t.GetHvalue('knetwk'), '-12345 ')
self.assertEqual(t.GetHvalue('kstnm'), 'CDV ')
self.assertEqual(t.GetHvalue('kcmpnm'), 'Q ')
def test_iztype11(self):
# test that iztype 11 is read correctly
sod_file = os.path.join(self.path, 'data', 'dis.G.SCZ.__.BHE_short')
tr = read(sod_file)[0]
sac = SacIO(sod_file)
t1 = tr.stats.starttime - float(tr.stats.sac.b)
t2 = sac.reftime
self.assertAlmostEqual(t1.timestamp, t2.timestamp, 5)
# see that iztype is written corretly
tempfile = NamedTemporaryFile().name
tr.write(tempfile, format="SAC")
sac2 = SacIO(tempfile)
os.remove(tempfile)
self.assertEqual(sac2.iztype, 11)
self.assertAlmostEqual(tr.stats.sac.b, sac2.b)
self.assertAlmostEqual(t2.timestamp, sac2.reftime.timestamp, 5)
def test_swapbytes(self):
tfilel = os.path.join(os.path.dirname(__file__), 'data', 'test.sac')
tfileb = os.path.join(os.path.dirname(__file__), 'data',
'test.sac.swap')
with NamedTemporaryFile() as tf:
tempfile = tf.name
tb = SacIO(tfileb)
tb.swap_byte_order()
tb.WriteSacBinary(tempfile)
tr1 = SacIO(tempfile)
tl = SacIO(tfilel)
np.testing.assert_array_equal(tl.seis, tr1.seis)
self.assertEqual(tl.GetHvalue('kevnm'), tr1.GetHvalue('kevnm'))
self.assertEqual(tl.GetHvalue('npts'), tr1.GetHvalue('npts'))
self.assertEqual(tl.GetHvalueFromFile(tfilel, 'kcmpnm'),
tr1.GetHvalueFromFile(tempfile, 'kcmpnm'))
def export_sac(db, filename, pair, components, filterid,corr,ncorr=0,sac_format=None,maxlag=None,cc_sampling_rate=None):
if sac_format is None:
sac_format=get_config(db,"sac_format")
if maxlag is None:
maxlag = float(get_config(db,"maxlag"))
if cc_sampling_rate is None:
cc_sampling_rate = float(get_config(db,"cc_sampling_rate"))
try:
os.makedirs(os.path.split(filename)[0])
except:
pass
filename += ".SAC"
mytrace = Trace(data=corr)
mytrace.stats['station'] = pair
mytrace.stats['sampling_rate'] = cc_sampling_rate
st = Stream(traces = [mytrace,])
st.write(filename,format='SAC')
tr = SacIO(filename)
if sac_format == "doublets":
tr.SetHvalue('A',120)
else:
tr.SetHvalue('B',-maxlag)
tr.SetHvalue('DEPMIN',np.min(corr))
tr.SetHvalue('DEPMAX',np.max(corr))
tr.SetHvalue('DEPMEN',np.mean(corr))
tr.SetHvalue('SCALE',1)
tr.SetHvalue('NPTS',len(corr))
tr.WriteSacBinary(filename)
del st, tr
return
def write2sac(d, header, output):
'''
Function to write the data and header to sac files
Inputs:
d - data array
header - dictionary of the header info
output - filename of the output sac file
'''
sacio = SacIO()
sacio.fromarray(d)
# set the date
t = header['record_time']
sacio.SetHvalue('nzyear', t.year)
sacio.SetHvalue('nzjday', t.julday)
sacio.SetHvalue('delta', 1. / header['df'])
sacio.SetHvalue('nzhour', t.hour)
sacio.SetHvalue('nzmin', t.minute)
sacio.SetHvalue('nzsec', t.second)
sacio.SetHvalue('kstnm', header['stnm'])
sacio.SetHvalue('stla', header['stla'])
sacio.SetHvalue('stlo', header['stlo'])
sacio.SetHvalue('stel', header['stel'])
sacio.SetHvalue('kcmpnm', header['comp'])
sacio.SetHvalue('evla', header['evla'])
sacio.SetHvalue('evlo', header['evlo'])
sacio.SetHvalue('o', header['o'])
sacio.SetHvalue('mag', header['mag'])
sacio.SetHvalue('o', header['o'])
#TRUE if DIST AZ BAZ and GCARC are to be calculated from st event coordinates.
sacio.SetHvalue('LCALDA', 1)
#set the type of the dependent variable as acceleration nm/sec/sec
#sacio.SetHvalue('idep',8)
sacio.WriteSacBinary(output)
def test_getdist(self):
tfile = os.path.join(os.path.dirname(__file__), 'data', 'test.sac')
with NamedTemporaryFile() as tf:
tempfile = tf.name
t = SacIO(tfile)
t.SetHvalue('evla', 48.15)
t.SetHvalue('evlo', 11.58333)
t.SetHvalue('stla', -41.2869)
t.SetHvalue('stlo', 174.7746)
t.SetHvalue('lcalda', 1)
t.WriteSacBinary(tempfile)
t2 = SacIO(tempfile)
b = np.array([18486532.5788 / 1000., 65.654154562, 305.975459869],
dtype=native_str('>f4'))
self.assertEqual(t2.GetHvalue('dist'), b[0])
self.assertEqual(t2.GetHvalue('az'), b[1])
self.assertEqual(t2.GetHvalue('baz'), b[2])
def test_Date(self):
"""
Test for SacIO '_get_date_'-function to calculate timestamp
"""
fn = os.path.join(os.path.dirname(__file__), 'data', 'test.sac')
t = SacIO(fn)
self.assertEqual(t.reftime.timestamp, 269596800.0)
diff = t.GetHvalue('npts')
self.assertEqual(int(t.endtime - t.starttime), diff)
def test_readWriteXY(self):
"""
Tests for ascii sac io
"""
with NamedTemporaryFile() as tf:
tempfile = tf.name
tfile = os.path.join(os.path.dirname(__file__), 'data', 'test.sac')
t = SacIO(tfile)
t.WriteSacXY(tempfile)
d = SacIO(tempfile, alpha=True)
e = SacIO()
e.ReadSacXY(tempfile)
self.assertEqual(e.GetHvalue('npts'), d.GetHvalue('npts'))
self.assertEqual(e.IsValidXYSacFile(tempfile), True)
self.assertEqual(e.IsValidSacFile(tempfile), False)
with NamedTemporaryFile() as tf:
tempfile = tf.name
d.WriteSacBinary(tempfile)
size1 = os.stat(tempfile)[6]
size2 = os.stat(tfile)[6]
self.assertEqual(size1, size2)
np.testing.assert_array_almost_equal(t.seis, d.seis, decimal=5)
def test_undefinedB(self):
"""
Test that an undefined B value (-12345.0) is not messing up the
starttime
"""
# read in the test file an see that sac reference time and
# starttime of seismogram are correct
tr = read(self.file)[0]
self.assertEqual(tr.stats.starttime.timestamp, 269596810.0)
self.assertEqual(tr.stats.sac.b, 10.0)
sac_ref_time = SacIO(self.file).reftime
self.assertEqual(sac_ref_time.timestamp, 269596800.0)
# change b to undefined and write (same case as if b == 0.0)
# now sac reference time and reftime of seismogram must be the
# same
tr.stats.sac.b = -12345.0
tmpfile = NamedTemporaryFile().name
tr.write(tmpfile, format="SAC")
tr2 = read(tmpfile)[0]
self.assertEqual(tr2.stats.starttime.timestamp, 269596810.0)
self.assertEqual(tr2.stats.sac.b, -12345.0)
sac_ref_time2 = SacIO(tmpfile).reftime
self.assertEqual(sac_ref_time2.timestamp, 269596810.0)
os.remove(tmpfile)
def test_read(self):
"""
Tests for SacIO read and write
"""
data = np.array([-8.7422776573475858e-08, -0.30901697278022766,
-0.58778536319732666, -0.8090171217918396,
-0.95105659961700439, -1.0, -0.95105630159378052,
-0.80901658535003662, -0.5877845287322998,
-0.30901604890823364, 1.1285198979749111e-06],
dtype=native_str('<f4'))
sacfile = os.path.join(self.path, 'test.sac')
t = SacIO()
t.ReadSacFile(sacfile)
np.testing.assert_array_equal(t.seis[0:11], data)
self.assertEqual(t.GetHvalue('npts'), 100)
self.assertEqual(t.GetHvalue("kstnm"), "STA ")
def updateSacHeader(sac,dir,latStaz,lonStaz,evla,evlo):
# load sac trace, update headers, write and close
tr = SacIO(dir + os.sep + sac)
tr.SetHvalue('evla',evla)
tr.SetHvalue('evlo',evlo)
tr.SetHvalue('stla',latStaz)
tr.SetHvalue('stlo',lonStaz)
(distD,Az,Baz,distkm)=dlaz(evla,evlo,latStaz,lonStaz)
tr.SetHvalue('dist',distkm)
tr.SetHvalue('gcarc',distD)
tr.SetHvalue('baz',Baz)
tr.SetHvalue('az',Az)
tr.WriteSacHeader(dir + os.sep + sac)
return 1
def updateSacHeaderEida(sacFiles, sourceFileFormat, outFileFormat, dir,evla,evlo):
# this operation works only if the source seed file is a fseed
if sourceFileFormat == "FSEED" and outFileFormat == "SAC":
# open rdseed.station file
# file = open(dir + "/rdseed.stations")
# loop over sac files to find stations
for sac in sacFiles:
info = sac.split('.')
staz = info[0]
#loop over line of rdseed.stations
file = open(dir + os.sep + "rdseed.stations")
for line in file:
a = line.split(' ')
station = a[0]
network = a[1]
latStaz = eval(a[2])
lonStaz = eval(a[3])
# if stations are the same, upadte header and exit this loop
if station == staz:
# load sac trace, update headers, write and close
tr = SacIO(dir + os.sep + sac)
tr.SetHvalue('evla',evla)
tr.SetHvalue('evlo',evlo)
tr.SetHvalue('stla',latStaz)
tr.SetHvalue('stlo',lonStaz)
(distD,Az,Baz,distkm)=dlaz(evla,evlo,latStaz,lonStaz)
tr.SetHvalue('dist',distkm)
tr.SetHvalue('gcarc',distD)
tr.SetHvalue('baz',Baz)
tr.SetHvalue('az',Az)
#distkm=dlaz(evla,evlo,latStaz,lonStaz)
tr.WriteSacHeader(dir + os.sep + sac)
break
return sacFiles
def write2sac(d, header, evla, evlo, evdp, mag, output):
sacio = SacIO()
sacio.fromarray(d)
# set the date to today
sacio.SetHvalue('nzyear', header['nzyear'])
sacio.SetHvalue('nzjday', header['nzjday'])
sacio.SetHvalue('delta', 0.02)
sacio.SetHvalue('nzhour', header['nzhour'])
sacio.SetHvalue('nzmin', header['nzmin'])
sacio.SetHvalue('nzsec', header['nzsec'])
sacio.SetHvalue('nzmsec', header['nzmsec'])
sacio.SetHvalue('kstnm', header['stnm'])
sacio.SetHvalue('stla', header['stla'])
sacio.SetHvalue('stlo', header['stlo'])
sacio.SetHvalue('kcmpnm', header['comp'])
sacio.SetHvalue('evla', evla)
sacio.SetHvalue('evlo', evlo)
sacio.SetHvalue('evdp', evdp)
sacio.SetHvalue('mag', mag)
#dist = sacio.GetHvalue('dist')
#print dist
dist = gps2DistAzimuth(stla, stlo, evla, evlo)[0] / 1000.
sacio.SetHvalue('dist', dist)
#sacio.SetHvalue('knetwk','phones')
#sacio.SetHvalue('kstnm',phone)
#sacio.SetHvalue('kcmpnm',comp)
#sacio.SetHvalue('kevnm',loc)
#sacio.SetHvalue('kuser0',test + ' test')
#sacio.SetHvalue('kuser0',version)
#sacio.SetHvalue('kuser1',brand)
#set the type of the dependent variable as acceleration nm/sec/sec
#sacio.SetHvalue('idep',8)
sacio.WriteSacBinary(output)
def test_getattr(self):
tfile = os.path.join(os.path.dirname(__file__), 'data', 'test.sac')
tr = SacIO(tfile)
self.assertEqual(tr.npts, tr.GetHvalue('npts'))
self.assertEqual(tr.kstnm, tr.GetHvalue('kstnm'))
templateDateTime = UTCDateTime(template) # converts the event name to a datetime class
templateJulDay = templateDateTime.julday # int
templateYear = templateDateTime.year # int
backgroundTime = 10 #Amount of time in longer event file before event origin time in seconds
# phaseMarkerList = []
# staList = []
# compList = []
phaseDict[template] = {}
#########################################################
for file in os.listdir('%s/event%s' %(templateDir,template)):
os.chdir('%s/event%s' %(templateDir,template))
if file.endswith('.SAC'):
file1 = file
station = file1[3:7]
component = file1[13]
quality_amarker=str(SacIO().GetHvalueFromFile(file1,'ka')) #P phase
aMarker = SacIO().GetHvalueFromFile(file1,'a')#P phase
quality_t0marker=str(SacIO().GetHvalueFromFile(file1,'kt0')) #S phase
t0Marker = SacIO().GetHvalueFromFile(file1,'t0')#S phase
if float(aMarker)!=-12345.0:
if (not phaseDict[template].has_key(station)):
phaseDict[template][station]=[]
phaseDict[template][station].append(aMarker)
aMarkerDateTime = templateDateTime - backgroundTime + aMarker
phaseDict[template][station].append(aMarkerDateTime)
elif float(t0Marker)!=-12345.0 and component =='E':
if (not phaseDict[template].has_key(station)):
phaseDict[template][station]=[]
phaseDict[template][station].append(t0Marker)
t0MarkerDateTime = templateDateTime - backgroundTime + t0Marker
phaseDict[template][station].append(t0MarkerDateTime)
def test_isSAC(self):
"""
Assertion is raised if file is not a SAC file
"""
t = SacIO()
self.assertRaises(SacError, t.ReadSacFile, __file__)
