parent
6abdc60167
commit
846df545dd
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{
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"python.testing.pytestArgs": [
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"tests"
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],
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"python.testing.unittestEnabled": false,
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"python.testing.nosetestsEnabled": false,
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"python.testing.pytestEnabled": true,
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"python.pythonPath": "/usr/bin/python3",
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"python.linting.flake8Enabled": true,
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"python.linting.enabled": true
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}
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{
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// See https://go.microsoft.com/fwlink/?LinkId=733558
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// for the documentation about the tasks.json format
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"version": "2.0.0",
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"tasks": [
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{
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"label": "install pip",
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"type": "process",
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"command": "${config:python.pythonPath}",
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"args": ["-m", "pip", "install", "."]
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}
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]
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}
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[build-system]
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requires = [
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"setuptools>=42",
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"wheel"
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]
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build-backend = "setuptools.build_meta"
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import pyrocko
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import numpy as num
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from .utils import traces_to_numpy_and_meta
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def remove_idas_instrument_vibration(traces, copy=True, return_ref=False):
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data, meta = traces_to_numpy_and_meta(traces)
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ntraces_ref = int((meta.start_distance * 0.9) / meta.spatial_resolution)
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ref = num.mean(data[:ntraces_ref], axis=1)
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out_traces = []
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for tr in traces:
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if copy:
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tr = tr.copy()
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tr.ydata -= ref
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out_traces.append(tr)
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if return_ref:
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trace_ref = tr.copy(data=False)
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trace_ref.ydata = ref
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trace_ref.station = "ref"
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out_traces.append(trace_ref)
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return out_traces
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import numpy as num
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from scipy import interpolate
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from collections.abc import Iterable
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from pyrocko.guts import Object, Float, List, Tuple, String, Timestamp
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from pyrocko import gf
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from pyrocko.model import Location
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import pyrocko.orthodrome as od
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r2d = 180./num.pi
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km = 1e3
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META = {
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'measure_length': None,
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'start_distance': None,
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'stop_distance': None,
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'gauge_length': None,
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'spatial_resolution': None,
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'geo_lat': None,
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'geo_lon': None,
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'geo_elevation': None,
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'channel': None,
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'unit': None
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}
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class QuantityType(gf.meta.QuantityType):
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choices = gf.meta.QuantityType.choices + ['strain', 'strain_rate']
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class Fiber(Object):
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lat = Float.T(
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default=0.)
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lon = Float.T(
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default=0.)
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codes = Tuple.T(
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4, String.T(), default=('', '', '', 'HSF'),
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help='network, station, location and channel codes to be set on '
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'the response trace. If station code is empty it will be filled'
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' by the channel number')
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quantity = QuantityType.T(
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default='strain',
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help='Measurement quantity type. If not given, it is guessed from the '
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'channel code. For some common cases, derivatives of the stored '
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'quantities are supported by using finite difference '
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'approximations (e.g. displacement to velocity or acceleration). '
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'4th order central FD schemes are used.')
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elevation = Float.T(
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default=0.0,
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help='station surface elevation in [m]')
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store_id = gf.meta.StringID.T(
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optional=True,
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help='ID of Green\'s function store to use for the computation. '
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'If not given, the processor may use a system default.')
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sample_rate = Float.T(
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optional=True,
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help='sample rate to produce. '
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'If not given the GF store\'s default sample rate is used. '
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'GF store specific restrictions may apply.')
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tmin = Timestamp.T(
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optional=True,
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help='time of first sample to request in [s]. '
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'If not given, it is determined from the Green\'s functions.')
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tmax = Timestamp.T(
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optional=True,
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help='time of last sample to request in [s]. '
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'If not given, it is determined from the Green\'s functions.')
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interpolation = gf.meta.InterpolationMethod.T(
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default='multilinear',
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help='Interpolation method between Green\'s functions. Supported are'
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' ``nearest_neighbor`` and ``multilinear``')
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coordinates = List.T(
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help='coordinates of the cable as ``pyrocko.model.Location`` or a tuple'
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' of (north_shift, east_shift, [elevation]).')
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channel_spacing = Float.T(
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default=4.,
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help='Channel spacing [m].')
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self._locations = []
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for coord in self.coordinates:
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if isinstance(coord, Location):
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loc = coord
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elif isinstance(coord, Iterable) and len(coord) in (2, 3):
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loc = Location(
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lat=self.lat,
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lon=self.lon,
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north_shift=coord[0],
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east_shift=coord[1],
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elevation=self.elevation if len(coord) == 2 else coord[2])
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else:
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raise AttributeError(
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'coordinates have to be a list of pyrocko.model.Location'
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' or tuples of (north_shift, east_shifts, [elevation]),'
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' not %s' % type(coord))
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self._locations.append(loc)
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assert len(self._locations) > 1, 'Fiber needs more than 1 coordinates'
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@classmethod
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def from_stations(cls, stations, **kwargs):
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return cls(
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coordinates=stations,
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**kwargs)
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@property
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def distances(self):
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locations = self._locations
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nlocs = len(locations)
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dists = [0.]
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for il in range(1, nlocs):
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dists.append(
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locations[il-1].distance_3d_to(locations[il]))
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return num.array(dists)
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@property
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def length(self):
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return num.sum(self.distances)
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@property
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def nchannels(self):
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dists = self.length
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return int(dists // self.channel_spacing)
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def interpolate_channels(self, start_channel=0):
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dists = num.cumsum(self.distances)
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interp_lat = interpolate.interp1d(
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dists,
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tuple(loc.effective_lat for loc in self._locations))
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interp_lon = interpolate.interp1d(
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dists,
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tuple(loc.effective_lon for loc in self._locations))
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interp_elevation = interpolate.interp1d(
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dists,
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tuple(loc.elevation for loc in self._locations))
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interp_distances = num.arange(
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0., dists.max(),
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step=self.channel_spacing)
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channels = num.arange(interp_distances.size) + start_channel
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nchannels = channels.size
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lats = interp_lat(interp_distances)
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lons = interp_lon(interp_distances)
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elevations = interp_elevation(interp_distances)
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azis = num.empty(nchannels)
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azis[:-1] = od.azimuth_numpy(
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lats[:-1], lons[:-1],
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lats[1:], lons[1:],
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)
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azis[-1] = azis[-2]
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ds = num.full(nchannels, self.channel_spacing)
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dips = -num.arctan2(
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num.gradient(elevations), ds) * r2d
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return lats, lons, elevations, azis, dips, channels
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def get_targets(self):
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lats, lons, elevations, azis, dips, channels = \
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self.interpolate_channels()
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nchannels = self.nchannels
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quantity = self.quantity
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if self.quantity in ('strain', 'strain_rate'):
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quantity = 'displacement'
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targets = []
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for icha in range(nchannels):
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codes = list(self.codes)
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if not codes[1]:
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codes[1] = '%05d' % icha
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t = gf.Target(
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lat=lats[icha],
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lon=lons[icha],
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elevation=elevations[icha],
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azimuth=azis[icha],
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dip=dips[icha],
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north_shift=0.,
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east_shift=0.,
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sample_rate=self.sample_rate,
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codes=codes,
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store_id=self.store_id,
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quantity=quantity,
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interpolation=self.interpolation
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)
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targets.append(t)
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return targets
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def get_locations(self):
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return self._locations
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class LocalEngine(gf.LocalEngine):
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def process_fiber(self, source, fiber, **kwargs):
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assert isinstance(source, Iterable), \
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'Currently only one source is supported!'
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targets = fiber.get_targets()
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resp = self.process(source, targets, **kwargs)
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traces = resp.pyrocko_traces()
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ntraces = len(traces)
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all_times = [(tr.tmin, tr.tmax) for tr in traces]
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all_tmin = num.min(all_times)
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all_tmax = num.max(all_times)
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meta = {
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'measure_length': fiber.length,
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'start_distance': 0.,
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'stop_distance': fiber.length,
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'gauge_length': fiber.channel_spacing,
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'spatial_resolution': fiber.channel_spacing
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}
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for icha, (tr, target) in enumerate(zip(traces, targets)):
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tr.extend(tmin=all_tmin, tmax=all_tmax, fillmethod='repeat')
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tr.meta = meta.copy()
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tr.meta['channel'] = icha
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tr.meta['geo_lat'] = target.lat
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tr.meta['geo_lon'] = target.lon
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tr.meta['geo_elevation'] = target.elevation
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nsamples = set([tr.ydata.size for tr in traces])
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assert len(nsamples) == 1
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nsamples = nsamples.pop()
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if fiber.quantity in ('strain', 'strain_rate'):
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assert ntraces > 3, \
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'Too few channels in fiber for finite-difference derivation'
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trs_strain_grad = num.gradient(
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num.array([tr.ydata for tr in traces]), fiber.channel_spacing,
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axis=0)
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for itr, tr in enumerate(traces):
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tr.set_ydata(trs_strain_grad[itr])
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if fiber.quantity == 'strain_rate':
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for tr in traces:
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tr.differentiate()
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return traces
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@ -0,0 +1,110 @@
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from pyrocko_das import gf
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from pyrocko.model import Location
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from pyrocko import trace
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import numpy as num
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km = 1e3
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def test_fiber():
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fiber = gf.Fiber(
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lat=0.5,
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lon=0.5,
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store_id='test',
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coordinates=(
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(0, 0),
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(100, 0)
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),
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channel_spacing=1.
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)
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assert fiber.distances.size == 2
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assert fiber.distances[0] == 0.
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assert fiber.distances[1] == 100.
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assert fiber.length == 100.
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assert fiber.nchannels == 100
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northings, eastings, elevations, azis, dips, channels = \
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fiber.interpolate_channels()
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assert channels.size == 100.
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num.testing.assert_equal(azis, 0.)
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num.testing.assert_equal(dips, 0.)
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targets = fiber.get_targets()
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assert len(targets) == 100
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assert len(targets) == fiber.nchannels
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fiber = gf.Fiber(
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lat=0.,
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lon=0.,
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store_id='test',
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coordinates=(
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(0, 0, 0.),
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(-20, 0, 20.),
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(-40, 0, 40.),
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),
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channel_spacing=1.,
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interpolation='multilinear'
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)
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northings, eastings, elevations, azis, dips, channels = \
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fiber.interpolate_channels()
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num.testing.assert_equal(azis, 180.)
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num.testing.assert_equal(dips, -45.)
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fiber = gf.Fiber(
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lat=0.,
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lon=0.,
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store_id='test',
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coordinates=(
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Location(
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north_shift=0.,
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east_shift=0,
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elevation=0),
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Location(
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north_shift=-100.,
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east_shift=0,
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elevation=100),
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),
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channel_spacing=1.,
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interpolation='multilinear'
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)
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northings, eastings, elevations, azis, dips, channels = \
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fiber.interpolate_channels()
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num.testing.assert_equal(azis, 180.)
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num.testing.assert_equal(dips, -45.)
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def test_process_fiber():
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import pyrocko.gf as pgf
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fiber = gf.Fiber(
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lat=0.0,
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lon=0.0,
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quantity='acceleration',
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store_id='das_test',
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coordinates=(
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(1100, 0),
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(2000, 1000)
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),
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channel_spacing=4.
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)
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engine = gf.LocalEngine(use_config=True)
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source = pgf.DCSource(
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lat=0., lon=0.,
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depth=2*km,
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strike=45.,
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dip=30.
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)
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traces = engine.process_fiber(source, fiber)
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trace.snuffle(traces)
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@ -1,9 +0,0 @@
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from pyrocko import io
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from pyrocko_das import remove_idas_instrument_vibration
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traces = io.read("")
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def test_remove_idas_vibration():
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remove_idas_instrument_vibration(traces)
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@ -0,0 +1,14 @@
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import numpy as num
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from pyrocko import io
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from pyrocko import trace
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def generate_data(ncha=100, deltat=0.001, cha_spacing=1.):
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meta = io.tdms_idas.META_KEYS.copy()
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cha_dist = num.arange(ncha) * cha_spacing
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traces = []
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for icha in range(ncha):
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dist = cha_dist[icha]
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||||
Loading…
Reference in new issue