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#!/usr/bin/env python |
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# -*- coding: utf-8 -*- |
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# Copyright (c) 2016-2017 Adam.Dybbroe |
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# Author(s): |
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# Adam.Dybbroe <[email protected]> |
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# This program is free software: you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation, either version 3 of the License, or |
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# (at your option) any later version. |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# You should have received a copy of the GNU General Public License |
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# along with this program. If not, see <http://www.gnu.org/licenses/>. |
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"""A very basic (example) plotting program to display spectral responses for a |
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set of satellite instruments for a give wavelength range |
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""" |
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import matplotlib.pyplot as plt |
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from pyspectral.rsr_reader import RelativeSpectralResponse |
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from pyspectral.utils import get_bandname_from_wavelength |
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#import logging |
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from pyspectral.utils import logging_on, logging_off, get_logger |
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import numpy as np |
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def plot_band(plt_in, band_name, spec_response, pltname=None): |
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"""Do the plotting of one band |
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""" |
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detectors = spec_response[band_name].keys() |
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# for det in detectors: |
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det = detectors[0] |
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resp = spec_response[band_name][det]['response'] |
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wvl = spec_response[band_name][det]['wavelength'] |
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resp = np.ma.masked_less_equal(resp, minimum_response) |
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wvl = np.ma.masked_array(wvl, resp.mask) |
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resp.compressed() |
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wvl.compressed() |
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# plt.plot(wvl, resp, label='{platform} - {sensor} - {band}'.format( |
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# platform=platform, sensor=sensor, band=band)) |
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if pltname: |
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plt_in.plot(wvl, resp, label='{platform} - {band}'.format( |
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platform=pltname, band=band_name)) |
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else: |
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plt_in.plot(wvl, resp, label='{band}'.format(band=band_name)) |
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return plt_in |
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if __name__ == "__main__": |
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import argparse |
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import sys |
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parser = argparse.ArgumentParser( |
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description='Plot spectral responses for a set of satellite imagers') |
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parser.add_argument("--platform_name", '-p', nargs='*', |
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help="The Platform name", |
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type=str, required=True) |
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parser.add_argument("--sensor", '-s', nargs='*', |
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help="The sensor/instrument name", |
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type=str, required=True) |
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parser.add_argument("-x", "--xlimits", nargs=2, |
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help=("x-axis boundaries for plot"), |
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default=None, type=float) |
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parser.add_argument("-t", "--minimum_response", |
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help=("Minimum response: Any response lower than " + |
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"this will be ignored when plotting"), |
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default=0.015, type=float) |
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parser.add_argument("-no_platform_name_in_legend", help=("No platform name in legend"), |
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action='store_true') |
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parser.add_argument("--title", help=("Plot title"), |
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default=None, type=str) |
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parser.add_argument("-o", "--filename", help=("Output plot file name"), |
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default=None, type=str) |
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parser.add_argument( |
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"-v", '--verbose', help=("Turn logging on"), action='store_true') |
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group = parser.add_mutually_exclusive_group(required=True) |
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group.add_argument("--bandname", '-b', |
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help="The sensor band name", type=str) |
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group.add_argument("--wavelength", "-w", type=float, |
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help='the approximate spectral wavelength in micron') |
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group.add_argument("--range", "-r", nargs='*', |
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help="The wavelength range for the plot", |
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default=[None, None], type=float) |
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LOG = get_logger(__name__) |
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args = parser.parse_args() |
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platform_names = args.platform_name |
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sensors = args.sensor |
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minimum_response = args.minimum_response |
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xlimits = args.xlimits |
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title = args.title |
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if not title: |
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title = 'Relative Spectral Responses' |
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filename = args.filename |
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no_platform_name_in_legend = args.no_platform_name_in_legend |
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verbose = args.verbose |
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if verbose: |
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logging_on() |
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else: |
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logging_off() |
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req_wvl = None |
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band = None |
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wvlmin, wvlmax = args.range |
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if args.bandname: |
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band = args.bandname |
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elif args.wavelength: |
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req_wvl = args.wavelength |
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figscale = 1.0 |
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if wvlmin: |
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figscale = (wvlmax - wvlmin) / 4. |
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figsize = (figscale * 1. + 10, figscale * 0.5 + 5) |
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plt.figure(figsize=figsize) |
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something2plot = False |
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for platform in platform_names: |
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for sensor in sensors: |
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try: |
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rsr = RelativeSpectralResponse(platform, sensor) |
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except IOError: |
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# LOG.exception('Failed getting the rsr data for platform %s ' + |
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# 'and sensor %s', platform, sensor) |
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rsr = None |
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else: |
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break |
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if not rsr: |
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continue |
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something2plot = True |
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if req_wvl: |
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band = get_bandname_from_wavelength(req_wvl, rsr.rsr, 0.5) |
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if not band: |
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continue |
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if no_platform_name_in_legend: |
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plt = plot_band(plt, band, rsr.rsr) |
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else: |
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plt = plot_band(plt, band, rsr.rsr, platform) |
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elif band: |
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if no_platform_name_in_legend: |
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plt = plot_band(plt, band, rsr.rsr) |
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else: |
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plt = plot_band(plt, band, rsr.rsr, platform) |
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else: |
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wvlx = wvlmin |
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prev_band = None |
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while wvlx < wvlmax: |
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band = get_bandname_from_wavelength(wvlx, rsr.rsr, 0.05) |
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wvlx = wvlx + 0.05 |
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if not band: |
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continue |
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if band != prev_band: |
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if no_platform_name_in_legend: |
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plt = plot_band(plt, band, rsr.rsr) |
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else: |
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plt = plot_band(plt, band, rsr.rsr, platform) |
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prev_band = band |
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if not something2plot: |
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LOG.error("Nothing to plot!") |
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sys.exit(0) |
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wmin, wmax = plt.xlim() |
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delta_x = (wmax - wmin) |
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wmax = wmax + delta_x / 4.0 |
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if xlimits: |
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wmin = xlimits[0] |
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wmax = xlimits[1] |
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plt.xlim((wmin, wmax)) |
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plt.title(title) |
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plt.legend(loc='lower right') |
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if filename: |
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plt.savefig(filename) |
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else: |
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if req_wvl: |
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plt.savefig('rsr_band_{:>04d}.png'.format(int(100 * req_wvl))) |
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elif wvlmin and wvlmax: |
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plt.savefig('rsr_band_{:>04d}_{:>04d}.png'.format( |
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int(100 * wvlmin), int(100 * wvlmax))) |
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else: |
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plt.savefig('rsr_band_{bandname}.png'.format(bandname=band)) |
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pytroll /
pyspectral
