# http://pyrocko.org - GPLv3
#
# The Pyrocko Developers, 21st Century
# ---|P------/S----------~Lg----------
from __future__ import absolute_import
import os
import sys
import subprocess
import tempfile
import calendar
import time
import re
import logging
import shutil
from pyrocko import ExternalProgramMissing
from pyrocko import trace, pile, model, util
from pyrocko.io import eventdata
pjoin = os.path.join
logger = logging.getLogger('pyrocko.io.rdseed')
def cmp(a, b):
return (a > b) - (a < b)
def read_station_header_file(fn):
def m(i, *args):
if len(ltoks) >= i + len(args) \
and (tuple(ltoks[i:i+len(args)]) == args):
return True
return False
def f(i):
return float(toks[i])
def s(i):
if len(toks) > i:
return toks[i]
else:
return ''
with open(fn, 'r') as fi:
stations = []
atsec, station, channel = None, None, None
for line in fi:
toks = line.split()
ltoks = line.lower().split()
if m(2, 'station', 'header'):
atsec = 'station'
station = {'channels': []}
stations.append(station)
continue
if m(2, 'station') and m(5, 'channel'):
atsec = 'channel'
channel = {}
station['channels'].append(channel)
continue
if atsec == 'station':
if m(1, 'station', 'code:'):
station['station'] = s(3)
elif m(1, 'network', 'code:'):
station['network'] = s(3)
elif m(1, 'name:'):
station['name'] = ' '.join(toks[2:])
if atsec == 'channel':
if m(1, 'channel:'):
channel['channel'] = s(2)
elif m(1, 'location:'):
channel['location'] = s(2)
elif m(1, 'latitude:'):
station['lat'] = f(2)
elif m(1, 'longitude:'):
station['lon'] = f(2)
elif m(1, 'elevation:'):
station['elevation'] = f(2)
elif m(1, 'local', 'depth:'):
channel['depth'] = f(3)
elif m(1, 'azimuth:'):
channel['azimuth'] = f(2)
elif m(1, 'dip:'):
channel['dip'] = f(2)
nsl_stations = {}
for station in stations:
for channel in station['channels']:
def cs(k, default=None):
return channel.get(k, station.get(k, default))
nsl = station['network'], station['station'], channel['location']
if nsl not in nsl_stations:
nsl_stations[nsl] = model.Station(
network=station['network'],
station=station['station'],
location=channel['location'],
lat=cs('lat'),
lon=cs('lon'),
elevation=cs('elevation'),
depth=cs('depth', None),
name=station['name'])
nsl_stations[nsl].add_channel(model.Channel(
channel['channel'],
azimuth=channel['azimuth'],
dip=channel['dip']))
return list(nsl_stations.values())
def cmp_version(a, b):
ai = [int(x) for x in a.split('.')]
bi = [int(x) for x in b.split('.')]
return cmp(ai, bi)
def dumb_parser(data):
(in_ws, in_kw, in_str) = (1, 2, 3)
state = in_ws
rows = []
cols = []
accu = ''
for c in data:
if state == in_ws:
if c == '"':
new_state = in_str
elif c not in (' ', '\t', '\n', '\r'):
new_state = in_kw
if state == in_kw:
if c in (' ', '\t', '\n', '\r'):
cols.append(accu)
accu = ''
if c in ('\n', '\r'):
rows.append(cols)
cols = []
new_state = in_ws
if state == in_str:
if c == '"':
accu += c
cols.append(accu[1:-1])
accu = ''
if c in ('\n', '\r'):
rows.append(cols)
cols = []
new_state = in_ws
state = new_state
if state in (in_kw, in_str):
accu += c
if len(cols) != 0:
rows.append(cols)
return rows
class Programs(object):
rdseed = 'rdseed'
avail = None
@staticmethod
def check():
if Programs.avail is not None:
return Programs.avail
else:
try:
rdseed_proc = subprocess.Popen(
[Programs.rdseed],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
(out, err) = rdseed_proc.communicate()
except OSError as e:
if e.errno == 2:
reason = "Could not find executable: '%s'." \
% Programs.rdseed
else:
reason = str(e)
logging.debug('Failed to run rdseed program. %s' % reason)
Programs.avail = False
return Programs.avail
ms = [re.search(
r'Release (\d+(\.\d+(\.\d+)?)?)', s.decode())
for s in (err, out)]
ms = list(filter(bool, ms))
if not ms:
logger.error('Cannot determine rdseed version number.')
else:
version = ms[0].group(1)
if cmp_version('4.7.5', version) == 1 \
or cmp_version(version, '5.1') == 1:
logger.warning(
'Module pyrocko.rdseed has not been tested with '
'version %s of rdseed.' % version)
Programs.avail = True
return Programs.avail
[docs]class SeedVolumeNotFound(Exception):
pass
[docs]class SeedVolumeAccess(eventdata.EventDataAccess):
def __init__(self, seedvolume, datapile=None):
'''Create new SEED Volume access object.
:param seedvolume: filename of seed volume
:param datapile: if not ``None``, this should be a
:py:class:`pile.Pile` object with data traces which are then used
instead of the data provided by the SEED volume.
(This is useful for dataless SEED volumes.)
'''
eventdata.EventDataAccess.__init__(self, datapile=datapile)
self.tempdir = None
Programs.check()
self.tempdir = None
self.seedvolume = seedvolume
if not os.path.isfile(self.seedvolume):
raise SeedVolumeNotFound()
self.tempdir = tempfile.mkdtemp("", "SeedVolumeAccess-")
self.station_headers_file = os.path.join(
self.tempdir, 'station_header_infos')
self._unpack()
self.shutil = shutil
def __del__(self):
if self.tempdir:
self.shutil.rmtree(self.tempdir)
def get_pile(self):
if self._pile is None:
fns = util.select_files([self.tempdir], regex=r'\.SAC$')
self._pile = pile.Pile()
self._pile.load_files(fns, fileformat='sac')
return self._pile
def get_resp_file(self, tr):
respfile = pjoin(self.tempdir, 'RESP.%s.%s.%s.%s' % tr.nslc_id)
if not os.path.exists(respfile):
raise eventdata.NoRestitution(
'no response information available for trace %s.%s.%s.%s'
% tr.nslc_id)
return respfile
def get_stationxml(self):
stations = self.get_pyrocko_stations()
respfiles = []
for station in stations:
for channel in station.get_channels():
nslc = station.nsl() + (channel.name,)
respfile = pjoin(self.tempdir, 'RESP.%s.%s.%s.%s' % nslc)
respfiles.append(respfile)
from pyrocko.fdsn import resp
sxml = resp.make_stationxml(stations, resp.iload(respfiles))
return sxml
def get_restitution(self, tr, allowed_methods):
if 'evalresp' in allowed_methods:
respfile = pjoin(self.tempdir, 'RESP.%s.%s.%s.%s' % tr.nslc_id)
if not os.path.exists(respfile):
raise eventdata.NoRestitution(
'no response information available for trace %s.%s.%s.%s'
% tr.nslc_id)
trans = trace.InverseEvalresp(respfile, tr)
return trans
else:
raise eventdata.NoRestitution(
'no response information available for trace %s.%s.%s.%s'
% tr.nslc_id)
[docs] def get_pyrocko_response(self, tr, target):
'''Extract the frequency response as :py:class:`trace.EvalResp`
instance for *tr*.
:param tr: :py:class:`trace.Trace` instance
'''
respfile = self.get_resp_file(tr)
return trace.Evalresp(respfile, tr, target)
def _unpack(self):
input_fn = self.seedvolume
output_dir = self.tempdir
def strerr(s):
return '\n'.join(['rdseed: '+line.decode()
for line in s.splitlines()])
try:
# seismograms:
if self._pile is None:
rdseed_proc = subprocess.Popen(
[Programs.rdseed, '-f', input_fn, '-d', '-z', '3', '-o',
'1', '-p', '-R', '-q', output_dir],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
(out, err) = rdseed_proc.communicate()
logging.info(strerr(err))
else:
rdseed_proc = subprocess.Popen(
[Programs.rdseed, '-f', input_fn, '-z', '3', '-p', '-R',
'-q', output_dir],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
(out, err) = rdseed_proc.communicate()
logging.info(strerr(err))
# event data:
rdseed_proc = subprocess.Popen(
[Programs.rdseed, '-f', input_fn, '-e', '-q', output_dir],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
(out, err) = rdseed_proc.communicate()
logging.info(strerr(err))
# station summary information:
rdseed_proc = subprocess.Popen(
[Programs.rdseed, '-f', input_fn, '-S', '-q', output_dir],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
(out, err) = rdseed_proc.communicate()
logging.info(strerr(err))
# station headers:
rdseed_proc = subprocess.Popen(
[Programs.rdseed, '-f', input_fn, '-s', '-q', output_dir],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
(out, err) = rdseed_proc.communicate()
with open(self.station_headers_file, 'w') as fout:
fout.write(out.decode())
logging.info(strerr(err))
except OSError as e:
if e.errno == 2:
reason = "Could not find executable: '%s'." % Programs.rdseed
else:
reason = str(e)
logging.fatal('Failed to unpack SEED volume. %s' % reason)
sys.exit(1)
def _get_events_from_file(self):
rdseed_event_file = os.path.join(self.tempdir, 'rdseed.events')
if not os.path.isfile(rdseed_event_file):
return []
with open(rdseed_event_file, 'r') as f:
events = []
for line in f:
toks = line.split(', ')
if len(toks) == 9:
datetime = toks[1].split('.')[0]
format = '%Y/%m/%d %H:%M:%S'
secs = calendar.timegm(time.strptime(datetime, format))
e = model.Event(
lat=float(toks[2]),
lon=float(toks[3]),
depth=float(toks[4])*1000.,
magnitude=float(toks[8]),
time=secs)
events.append(e)
else:
raise Exception('Event description in unrecognized format')
return events
def _get_stations_from_file(self):
stations = read_station_header_file(self.station_headers_file)
return stations
def _insert_channel_descriptions(self, stations):
# this is done beforehand in this class
pass
def check_have_rdseed():
if not Programs.check():
raise ExternalProgramMissing(
'rdseed is not installed or cannot be found')
