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#!/usr/bin/env python |
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# -*- coding: utf-8 -*- |
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# Copyright (c) 2013-2018 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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"""Unit testing the 3.7 micron reflectance calculations""" |
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from pyspectral.near_infrared_reflectance import Calculator |
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from mock import patch |
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import unittest |
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import numpy as np |
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TEST_RSR = {'20': {}} |
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TEST_RSR['20']['det-1'] = {} |
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TEST_RSR['20']['det-1']['central_wavelength'] = 3.780281935 |
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TEST_RSR['20']['det-1']['wavelength'] = np.array([ |
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3.6123999, 3.6163599, 3.6264927, 3.6363862, 3.646468, |
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3.6564937, 3.6664478, 3.6765388, 3.6865413, 3.6964585, |
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3.7065142, 3.716509, 3.7264658, 3.7364102, 3.7463682, |
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3.7563652, 3.7664226, 3.7763396, 3.7863384, 3.7964207, |
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3.8063589, 3.8163606, 3.8264089, 3.8364836, 3.8463381, |
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3.8563975, 3.8664163, 3.8763755, 3.8864797, 3.8964978, |
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3.9064275, 3.9164873, 3.9264729, 3.9364026, 3.9465107, |
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3.9535347], dtype='double') |
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TEST_RSR['20']['det-1']['response'] = np.array([ |
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0.01, 0.0118, 0.01987, 0.03226, 0.05028, 0.0849, |
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0.16645, 0.33792, 0.59106, 0.81815, 0.96077, 0.92855, |
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0.86008, 0.8661, 0.87697, 0.85412, 0.88922, 0.9541, |
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0.95687, 0.91037, 0.91058, 0.94256, 0.94719, 0.94808, |
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1., 0.92676, 0.67429, 0.44715, 0.27762, 0.14852, |
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0.07141, 0.04151, 0.02925, 0.02085, 0.01414, 0.01], dtype='double') |
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TEST_RSR_WN = {'20': {}} |
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TEST_RSR_WN['20']['det-1'] = {} |
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WVN = np.array([2529.38208008, 2533.8840332, 2540.390625, 2546.81494141, |
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2553.30883789, 2559.88354492, 2566.40722656, 2573.02270508, |
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2579.72949219, 2586.37451172, 2593.09375, 2599.87548828, |
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2606.55371094, 2613.41674805, 2620.29760742, 2627.18286133, |
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2634.06005859, 2641.07421875, 2648.06713867, 2655.03930664, |
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2662.14794922, 2669.25170898, 2676.36572266, 2683.50805664, |
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2690.69702148, 2697.95288086, 2705.29199219, 2712.56982422, |
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2719.94970703, 2727.43554688, 2734.8605957, 2742.38012695, |
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2749.9831543, 2757.48510742, 2765.21142578, 2768.24291992], |
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dtype='float32') |
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RESP = np.array([0.01, 0.01414, 0.02085, 0.02925, 0.04151, |
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0.07141, 0.14851999, 0.27761999, 0.44714999, 0.67429, |
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0.92676002, 1., 0.94808, 0.94718999, 0.94256002, |
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0.91057998, 0.91036999, 0.95687002, 0.95410001, 0.88922, |
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0.85412002, 0.87696999, 0.86610001, 0.86008, 0.92855, |
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0.96077001, 0.81814998, 0.59105998, 0.33792001, 0.16644999, |
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0.0849, 0.05028, 0.03226, 0.01987, 0.0118, |
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0.01], dtype='float32') |
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TEST_RSR_WN['20']['det-1']['central_wavelength'] = 3.780281935 |
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TEST_RSR_WN['20']['det-1']['wavenumber'] = WVN |
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TEST_RSR_WN['20']['det-1']['response'] = RESP |
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class TestReflectance(unittest.TestCase): |
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"""Unit testing the reflectance calculations""" |
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def setUp(self): |
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"""Set up""" |
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pass |
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def test_rsr_integral(self): |
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"""Test calculating the integral of the relative spectral response |
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function. |
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""" |
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with patch('pyspectral.radiance_tb_conversion.RelativeSpectralResponse') as mymock: |
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instance = mymock.return_value |
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instance.rsr = TEST_RSR |
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instance.unit = '1e-6 m' |
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instance.si_scale = 1e-6 |
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refl37 = Calculator('EOS-Aqua', 'modis', '20') |
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expected = 1.8563451e-07 # unit = 'm' (meter) |
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self.assertAlmostEqual(refl37.rsr_integral, expected) |
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with patch('pyspectral.radiance_tb_conversion.RelativeSpectralResponse') as mymock: |
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instance = mymock.return_value |
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instance.rsr = TEST_RSR_WN |
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instance.unit = 'cm-1' |
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instance.si_scale = 100. |
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refl37 = Calculator('EOS-Aqua', 'modis', '20', wavespace='wavenumber') |
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expected = 13000.385 # SI units = 'm-1' (1/meter) |
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res = refl37.rsr_integral |
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self.assertAlmostEqual(res / expected, 1.0, 6) |
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def test_reflectance(self): |
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"""Test the derivation of the reflective part of a 3.7 micron band""" |
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with patch('pyspectral.radiance_tb_conversion.RelativeSpectralResponse') as mymock: |
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instance = mymock.return_value |
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instance.rsr = TEST_RSR |
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instance.unit = '1e-6 m' |
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instance.si_scale = 1e-6 |
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refl37 = Calculator('EOS-Aqua', 'modis', '20') |
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sunz = 80. |
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tb3 = 290. |
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tb4 = 282. |
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refl = refl37.reflectance_from_tbs(sunz, tb3, tb4) |
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self.assertAlmostEqual(refl, 0.251245010648, 6) |
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tb3x = refl37.emissive_part_3x() |
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self.assertAlmostEqual(tb3x, 276.213054, 6) |
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sunz = 80. |
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tb3 = 295. |
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tb4 = 282. |
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refl = refl37.reflectance_from_tbs(sunz, tb3, tb4) |
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self.assertAlmostEqual(refl, 0.452497961, 6) |
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tb3x = refl37.emissive_part_3x() |
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self.assertAlmostEqual(tb3x, 270.077268, 6) |
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sunz = 50. |
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tb3 = 300. |
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tb4 = 285. |
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refl = refl37.reflectance_from_tbs(sunz, tb3, tb4) |
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self.assertAlmostEqual(refl, 0.1189217, 6) |
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tb3x = refl37.emissive_part_3x() |
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self.assertAlmostEqual(tb3x, 282.455426, 6) |
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def tearDown(self): |
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"""Clean up""" |
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pass |
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def suite(): |
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"""The suite for test_reflectance.""" |
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loader = unittest.TestLoader() |
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mysuite = unittest.TestSuite() |
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mysuite.addTest(loader.loadTestsFromTestCase(TestReflectance)) |
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return mysuite |
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pytroll /
pyspectral
