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# Copyright (c) 2008-2017 MetPy Developers. |
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# Distributed under the terms of the BSD 3-Clause License. |
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# SPDX-License-Identifier: BSD-3-Clause |
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"""Test the `indices` module.""" |
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from datetime import datetime |
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from metpy.calc import mean_wind_pressure_weighted, precipitable_water |
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from metpy.io import get_upper_air_data |
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from metpy.io.upperair import UseSampleData |
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from metpy.testing import assert_almost_equal, assert_array_equal |
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from metpy.units import units |
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def test_precipitable_water(): |
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"""Test precipitable water with observed sounding.""" |
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with UseSampleData(): |
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data = get_upper_air_data(datetime(2016, 5, 22, 0), 'DDC', source='wyoming') |
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pw = precipitable_water(data.variables['dewpoint'][:], data.variables['pressure'][:]) |
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truth = (0.8899441949243486 * units('inches')).to('millimeters') |
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assert_array_equal(pw, truth) |
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def test_mean_wind_pressure_weighted(): |
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"""Test pressure-weighted mean wind function with vertical interpolation.""" |
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with UseSampleData(): |
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data = get_upper_air_data(datetime(2016, 5, 22, 0), 'DDC', source='wyoming') |
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mean6 = mean_wind_pressure_weighted(data.variables['u_wind'][:], |
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data.variables['v_wind'][:], |
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data.variables['pressure'][:], |
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data.variables['height'][:], |
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depth=6000 * units('meter')) |
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assert_almost_equal(mean6[0], 6.0208700094534775 * units('m/s')) |
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assert_almost_equal(mean6[1], 7.966031839967931 * units('m/s')) |
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def test_mean_wind_pressure_weighted_elevated(): |
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"""Test pressure-weighted mean wind function with a base above the surface.""" |
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with UseSampleData(): |
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data = get_upper_air_data(datetime(2016, 5, 22, 0), 'DDC', source='wyoming') |
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mean6 = mean_wind_pressure_weighted(data.variables['u_wind'][:], |
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data.variables['v_wind'][:], |
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data.variables['pressure'][:], |
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data.variables['height'][:], |
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depth=3000 * units('meter'), |
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bottom=data.variables['height'][0] + |
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3000 * units('meter')) |
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assert_almost_equal(mean6[0], 8.270829843626476 * units('m/s')) |
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assert_almost_equal(mean6[1], 1.7392601775853547 * units('m/s')) |
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Unidata /
MetPy
