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| # coding=utf-8 | ||
| # Copyright (C) Alex Urban (2019) | ||
| # | ||
| # This file is part of the GW DetChar python package. | ||
| # | ||
| # GW DetChar is free software: you can redistribute it and/or modify | ||
| # it under the terms of the GNU General Public License as published by | ||
| # the Free Software Foundation, either version 3 of the License, or | ||
| # (at your option) any later version. | ||
| # | ||
| # GW DetChar is distributed in the hope that it will be useful, | ||
| # but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| # GNU General Public License for more details. | ||
| # | ||
| # You should have received a copy of the GNU General Public License | ||
| # along with GW DetChar. If not, see <http://www.gnu.org/licenses/>. | ||
|
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| """Methods and utilties for optical scattering | ||
| """ | ||
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| __author__ = 'Alex Urban <alexander.urban@ligo.org>' | ||
| __credits__ = 'Duncan Macleod <duncan.macleod@ligo.org>' \ | ||
| 'Joshua Smith <joshua.smith@ligo.org>' \ | ||
| 'Andrew Lundgren <andrew.lundgren>@ligo.org>' | ||
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| # -- imports ------------------------------------------------------------------ | ||
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| # import scattering utils | ||
| from .core import * |
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| # coding=utf-8 | ||
| # Copyright (C) Alex Urban (2019) | ||
| # | ||
| # This file is part of the GW DetChar python package. | ||
| # | ||
| # GW DetChar is free software: you can redistribute it and/or modify | ||
| # it under the terms of the GNU General Public License as published by | ||
| # the Free Software Foundation, either version 3 of the License, or | ||
| # (at your option) any later version. | ||
| # | ||
| # GW DetChar is distributed in the hope that it will be useful, | ||
| # but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| # GNU General Public License for more details. | ||
| # | ||
| # You should have received a copy of the GNU General Public License | ||
| # along with GW DetChar. If not, see <http://www.gnu.org/licenses/>. | ||
|
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| """Simple command-line interface to gwdetchar.scattering | ||
| This module scans through records of optic motion and predicts scattering | ||
| fringe frequencies. For those channels with fringes above a user-specified | ||
| threshold, a plot is created comparing the fringes to a high-resolution Q-scan | ||
| spectrogram. | ||
| To identify time segments where scattering is likely, please use the | ||
| command-line script: `gwdetchar-scattering --help` | ||
| """ | ||
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| import os | ||
| import sys | ||
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| from matplotlib import use | ||
| use('agg') # noqa | ||
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| from gwpy.time import to_gps | ||
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| from .. import (cli, const) | ||
| from ..omega import highpass | ||
| from ..io.datafind import get_data | ||
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| from . import * | ||
| from . import plot | ||
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| __author__ = 'Alex Urban <alexander.urban@ligo.org>' | ||
| __credits__ = 'Joshua Smith <joshua.smith@ligo.org>' \ | ||
| 'Andrew Lundgren <andrew.lundgren>@ligo.org>' \ | ||
| 'Duncan Macleod <duncan.macleod@ligo.org>' | ||
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| # global variables | ||
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| ASD_KW = { | ||
| 'method': 'median', | ||
| 'fftlength': 8, | ||
| 'overlap': 4, | ||
| } | ||
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| MOTION_CHANNELS = [channel for key in OPTIC_MOTION_CHANNELS.keys() | ||
| for channel in OPTIC_MOTION_CHANNELS[key]] | ||
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| logger = cli.logger('gwdetchar.scattering') | ||
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| # -- main function ------------------------------------------------------------ | ||
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| def main(args=None): | ||
| """Parse command-line arguments, process optics, and write plots | ||
| """ | ||
| # define command-line arguments | ||
| parser = cli.create_parser(description=__doc__) | ||
| parser.add_argument('gpstime', type=to_gps, | ||
| help='GPS time or datestring to analyze') | ||
| cli.add_ifo_option(parser, ifo=const.IFO) | ||
| parser.add_argument('-d', '--duration', type=float, default=60, | ||
| help='Duration (seconds) of analysis, default: 60') | ||
| parser.add_argument('-t', '--frequency-threshold', type=float, default=15, | ||
| help='critical fringe frequency threshold (Hz), ' | ||
| 'default: %(default)s') | ||
| parser.add_argument('-m', '--multipliers', default='1,2,4,8', | ||
| help='harmonic numbers to plot predicted motion for, ' | ||
| 'should be given as a comma-separated list of ' | ||
| 'numbers, default: %(default)s') | ||
| parser.add_argument('-x', '--multiplier-for-threshold', type=int, | ||
| default=4, | ||
| help='frequency multiplier to use when applying ' | ||
| '--frequency-threshold, default: %(default)s') | ||
| parser.add_argument('-w', '--primary-channel', | ||
| default='GDS-CALIB_STRAIN', | ||
| help='name of primary channel (without IFO prefix), ' | ||
| 'default: %(default)s') | ||
| parser.add_argument('-W', '--primary-frametype', default='{IFO}_HOFT_C00', | ||
| help='frametype from which to read primary channel, ' | ||
| 'default: %(default)s') | ||
| parser.add_argument('-a', '--aux-frametype', default='{IFO}_R', | ||
| help='frametype from which to read aux channels, ' | ||
| 'default: %(default)s') | ||
| parser.add_argument('-o', '--output-dir', type=os.path.abspath, | ||
| default=os.curdir, | ||
| help='Output directory for analysis, ' | ||
| 'default: %(default)s') | ||
| parser.add_argument('-c', '--colormap', default='viridis', | ||
| help='name of colormap to use, default: %(default)s') | ||
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| # parse arguments | ||
| args = parser.parse_args(args) | ||
| ifo = args.ifo | ||
| gps = float(args.gpstime) | ||
| gpsstart = gps - 0.5 * args.duration | ||
| gpsend = gps + 0.5 * args.duration | ||
| primary = ':'.join([ifo, args.primary_channel]) | ||
| thresh = args.frequency_threshold | ||
| multipliers = [int(x) for x in args.multipliers.split(',')] | ||
| harmonic = args.multiplier_for_threshold | ||
| if '{IFO}' in args.primary_frametype: | ||
| args.primary_frametype = args.primary_frametype.format(IFO=ifo) | ||
| if '{IFO}' in args.aux_frametype: | ||
| args.aux_frametype = args.aux_frametype.format(IFO=ifo) | ||
| logger.info('{0} Scattering: {1}'.format(ifo, gps)) | ||
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| # set up spectrogram | ||
| logger.debug('Setting up a Q-scan spectrogram of {}'.format(primary)) | ||
| hoft = get_data(primary, start=gps-34, end=gps+34, | ||
| frametype=args.primary_frametype, | ||
| verbose='Reading primary channel:'.rjust(30)) | ||
| hoft = highpass(hoft, f_low=thresh).resample(256) | ||
| qspecgram = hoft.q_transform(qrange=(4, 150), frange=(0, 60), gps=gps, | ||
| fres=0.1, outseg=(gpsstart, gpsend), **ASD_KW) | ||
| qspecgram.name = primary | ||
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| # process channels | ||
| channels = [':'.join([ifo, c]) for c in MOTION_CHANNELS] | ||
| data = get_data( | ||
| channels, start=gpsstart, end=gpsend, frametype=args.aux_frametype, | ||
| verbose='Reading auxiliary sensors:'.rjust(30)) | ||
| count = 0 # running count of plots written | ||
| for channel in channels: | ||
| logger.info(' -- Processing {} -- '.format(channel)) | ||
| try: | ||
| motion = data[channel].detrend().resample(128) | ||
| except KeyError: | ||
| logger.warning('Skipping {}'.format(channel)) | ||
| pass | ||
| # predict scattering frequencies | ||
| fringe = get_fringe_frequency(motion, multiplier=1) | ||
| ind = fringe.argmax() | ||
| fmax = fringe.value[ind] | ||
| tmax = fringe.times.value[ind] | ||
| logger.debug('Maximum scatter frequency {0:.2f} Hz at GPS second ' | ||
| '{1:.2f}'.format(fmax, tmax)) | ||
| if harmonic * fmax < thresh: | ||
| logger.warning('No significant evidence of scattering ' | ||
| 'found in {}'.format(channel)) | ||
| continue | ||
| # plot spectrogram and fringe frequency | ||
| output = os.path.join( | ||
| args.output_dir, | ||
| '%s-%s-%s-{}.png' % ( | ||
| channel.replace(':', '-'), gps, args.duration) | ||
| ) | ||
| logger.debug('Plotting spectra and predicted fringe frequencies') | ||
| plot.spectral_comparison( | ||
| gps, qspecgram, fringe, output.format('comparison'), thresh=thresh, | ||
| multipliers=multipliers, colormap=args.colormap) | ||
| plot.spectral_overlay( | ||
| gps, qspecgram, fringe, output.format('overlay'), | ||
| multipliers=multipliers) | ||
| logger.info(' -- Channel complete -- ') | ||
| count += 1 # increment counter | ||
| logger.info('{0:g} chanels plotted in {1}'.format(count, args.output_dir)) | ||
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| if __name__ == "__main__": # pragma: no-cover | ||
| sys.exit(main()) |
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