/
test_seviri_l1b_hrit.py
783 lines (688 loc) · 38.4 KB
/
test_seviri_l1b_hrit.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright (c) 2017-2018 Satpy developers
#
# This file is part of satpy.
#
# satpy 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.
#
# satpy 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
# satpy. If not, see <http://www.gnu.org/licenses/>.
"""The HRIT msg reader tests package."""
import sys
from datetime import datetime
import numpy as np
import xarray as xr
from satpy.readers.seviri_l1b_hrit import (HRITMSGFileHandler, HRITMSGPrologueFileHandler, HRITMSGEpilogueFileHandler,
NoValidOrbitParams, pad_data)
from satpy.readers.seviri_base import CHANNEL_NAMES, VIS_CHANNELS
from satpy.dataset import DatasetID
if sys.version_info < (2, 7):
import unittest2 as unittest
else:
import unittest
try:
from unittest import mock
except ImportError:
import mock
def new_get_hd(instance, hdr_info):
"""Generate some metadata."""
instance.mda = {'spectral_channel_id': 1}
instance.mda.setdefault('number_of_bits_per_pixel', 10)
instance.mda['projection_parameters'] = {'a': 6378169.00,
'b': 6356583.80,
'h': 35785831.00,
'SSP_longitude': 0.0}
instance.mda['orbital_parameters'] = {}
instance.mda['total_header_length'] = 12
class TestHRITMSGFileHandlerHRV(unittest.TestCase):
"""Test the HRITFileHandler."""
@mock.patch('satpy.readers.seviri_l1b_hrit.np.fromfile')
def setUp(self, fromfile):
"""Set up the hrit file handler for testing HRV."""
m = mock.mock_open()
fromfile.return_value = np.array([(1, 2)], dtype=[('total_header_length', int),
('hdr_id', int)])
with mock.patch('satpy.readers.hrit_base.open', m, create=True) as newopen:
with mock.patch('satpy.readers.seviri_l1b_hrit.CHANNEL_NAMES'):
with mock.patch.object(HRITMSGFileHandler, '_get_hd', new=new_get_hd):
newopen.return_value.__enter__.return_value.tell.return_value = 1
prologue = mock.MagicMock()
prologue.prologue = {"SatelliteStatus": {"SatelliteDefinition": {"SatelliteId": 324,
"NominalLongitude": 47}},
'GeometricProcessing': {'EarthModel': {'TypeOfEarthModel': 2,
'NorthPolarRadius': 10,
'SouthPolarRadius': 10,
'EquatorialRadius': 10}},
'ImageDescription': {'ProjectionDescription': {'LongitudeOfSSP': 0.0}}}
prologue.get_satpos.return_value = None, None, None
prologue.get_earth_radii.return_value = None, None
epilogue = mock.MagicMock()
epilogue.epilogue = {'ImageProductionStats':
{'ActualL15CoverageHRV':
{'LowerSouthLineActual': 1,
'LowerNorthLineActual': 8256,
'LowerEastColumnActual': 2877,
'LowerWestColumnActual': 8444,
'UpperSouthLineActual': 8257,
'UpperNorthLineActual': 11136,
'UpperEastColumnActual': 1805,
'UpperWestColumnActual': 7372}}}
self.reader = HRITMSGFileHandler(
'filename',
{'platform_shortname': 'MSG3',
'start_time': datetime(2016, 3, 3, 0, 0),
'service': 'MSG'},
{'filetype': 'info'},
prologue,
epilogue)
ncols = 5568
nlines = 464
nbits = 10
self.reader.fill_hrv = True
self.reader.mda['number_of_bits_per_pixel'] = nbits
self.reader.mda['number_of_lines'] = nlines
self.reader.mda['number_of_columns'] = ncols
self.reader.mda['data_field_length'] = nlines * ncols * nbits
self.reader.mda['cfac'] = 5
self.reader.mda['lfac'] = 5
self.reader.mda['coff'] = 10
self.reader.mda['loff'] = 10
self.reader.mda['projection_parameters'] = {}
self.reader.mda['projection_parameters']['a'] = 6378169.0
self.reader.mda['projection_parameters']['b'] = 6356583.8
self.reader.mda['projection_parameters']['h'] = 35785831.0
self.reader.mda['projection_parameters']['SSP_longitude'] = 44
self.reader.mda['projection_parameters']['SSP_latitude'] = 0.0
self.reader.mda['orbital_parameters'] = {}
self.reader.mda['orbital_parameters']['satellite_nominal_longitude'] = 47
self.reader.mda['orbital_parameters']['satellite_nominal_latitude'] = 0.0
self.reader.mda['orbital_parameters']['satellite_actual_longitude'] = 47.5
self.reader.mda['orbital_parameters']['satellite_actual_latitude'] = -0.5
self.reader.mda['orbital_parameters']['satellite_actual_altitude'] = 35783328
self.reader.mda['segment_sequence_number'] = 18
self.reader.mda['planned_start_segment_number'] = 1
tline = np.zeros(nlines, dtype=[('days', '>u2'), ('milliseconds', '>u4')])
tline['days'][1:-1] = 21246 * np.ones(nlines-2) # 2016-03-03
tline['milliseconds'][1:-1] = np.arange(nlines-2)
self.reader.mda['image_segment_line_quality'] = {'line_mean_acquisition': tline}
@mock.patch('satpy.readers.hrit_base.np.memmap')
def test_read_hrv_band(self, memmap):
"""Test reading the hrv band."""
nbits = self.reader.mda['number_of_bits_per_pixel']
memmap.return_value = np.random.randint(0, 256,
size=int((464 * 5568 * nbits) / 8),
dtype=np.uint8)
res = self.reader.read_band('HRV', None)
self.assertEqual(res.shape, (464, 5568))
@mock.patch('satpy.readers.seviri_l1b_hrit.HRITMSGFileHandler._get_timestamps')
@mock.patch('satpy.readers.seviri_l1b_hrit.HRITFileHandler.get_dataset')
@mock.patch('satpy.readers.seviri_l1b_hrit.HRITMSGFileHandler.calibrate')
def test_get_dataset(self, calibrate, parent_get_dataset, _get_timestamps):
"""Test getting the hrv dataset."""
key = mock.MagicMock(calibration='calibration')
key.name = 'HRV'
info = {'units': 'units', 'wavelength': 'wavelength', 'standard_name': 'standard_name'}
timestamps = np.arange(0, 464, dtype='datetime64[ns]')
parent_get_dataset.return_value = mock.MagicMock()
calibrate.return_value = xr.DataArray(data=np.zeros((464, 5568)), dims=('y', 'x'))
_get_timestamps.return_value = timestamps
res = self.reader.get_dataset(key, info)
self.assertEqual(res.shape, (464, 11136))
# Test method calls
parent_get_dataset.assert_called_with(key, info)
calibrate.assert_called_with(parent_get_dataset(), key.calibration)
# Test attributes (just check if raw metadata is there and then remove it before checking the remaining
# attributes)
attrs_exp = info.copy()
attrs_exp.update({
'platform_name': self.reader.platform_name,
'sensor': 'seviri',
'satellite_longitude': self.reader.mda['projection_parameters']['SSP_longitude'],
'satellite_latitude': self.reader.mda['projection_parameters']['SSP_latitude'],
'satellite_altitude': self.reader.mda['projection_parameters']['h'],
'orbital_parameters': {'projection_longitude': 44,
'projection_latitude': 0.,
'projection_altitude': 35785831.0,
'satellite_nominal_longitude': 47,
'satellite_nominal_latitude': 0.0,
'satellite_actual_longitude': 47.5,
'satellite_actual_latitude': -0.5,
'satellite_actual_altitude': 35783328},
'georef_offset_corrected': self.reader.mda['offset_corrected']
})
self.assertIn('raw_metadata', res.attrs)
res.attrs.pop('raw_metadata')
self.assertDictEqual(attrs_exp, res.attrs)
# Test timestamps
self.assertTrue(np.all(res['acq_time'] == timestamps))
self.assertEqual(res['acq_time'].attrs['long_name'], 'Mean scanline acquisition time')
@mock.patch('satpy.readers.seviri_l1b_hrit.HRITMSGFileHandler._get_timestamps')
@mock.patch('satpy.readers.seviri_l1b_hrit.HRITFileHandler.get_dataset')
@mock.patch('satpy.readers.seviri_l1b_hrit.HRITMSGFileHandler.calibrate')
def test_get_dataset_non_fill(self, calibrate, parent_get_dataset, _get_timestamps):
"""Test getting a non-filled hrv dataset."""
key = mock.MagicMock(calibration='calibration')
key.name = 'HRV'
info = {'units': 'units', 'wavelength': 'wavelength', 'standard_name': 'standard_name'}
timestamps = np.arange(0, 464, dtype='datetime64[ns]')
self.reader.fill_hrv = False
parent_get_dataset.return_value = mock.MagicMock()
calibrate.return_value = xr.DataArray(data=np.zeros((464, 5568)), dims=('y', 'x'))
_get_timestamps.return_value = timestamps
res = self.reader.get_dataset(key, info)
self.assertEqual(res.shape, (464, 5568))
# Test method calls
parent_get_dataset.assert_called_with(key, info)
calibrate.assert_called_with(parent_get_dataset(), key.calibration)
# Test attributes (just check if raw metadata is there and then remove it before checking the remaining
# attributes)
attrs_exp = info.copy()
attrs_exp.update({
'platform_name': self.reader.platform_name,
'sensor': 'seviri',
'satellite_longitude': self.reader.mda['projection_parameters']['SSP_longitude'],
'satellite_latitude': self.reader.mda['projection_parameters']['SSP_latitude'],
'satellite_altitude': self.reader.mda['projection_parameters']['h'],
'orbital_parameters': {'projection_longitude': 44,
'projection_latitude': 0.,
'projection_altitude': 35785831.0,
'satellite_nominal_longitude': 47,
'satellite_nominal_latitude': 0.0,
'satellite_actual_longitude': 47.5,
'satellite_actual_latitude': -0.5,
'satellite_actual_altitude': 35783328},
'georef_offset_corrected': self.reader.mda['offset_corrected']
})
self.assertIn('raw_metadata', res.attrs)
res.attrs.pop('raw_metadata')
self.assertDictEqual(attrs_exp, res.attrs)
# Test timestamps
self.assertTrue(np.all(res['acq_time'] == timestamps))
self.assertEqual(res['acq_time'].attrs['long_name'], 'Mean scanline acquisition time')
def test_pad_data(self):
"""Test the hrv padding."""
data = xr.DataArray(data=np.zeros((1, 10)), dims=('y', 'x'))
east_bound = 4
west_bound = 13
final_size = (1, 20)
res = pad_data(data, final_size, east_bound, west_bound)
expected = np.array([[np.nan, np.nan, np.nan, 0., 0., 0., 0., 0., 0., 0., 0., 0., 0.,
np.nan, np.nan, np.nan, np.nan, np.nan, np.nan, np.nan]])
np.testing.assert_allclose(res, expected)
east_bound = 3
self.assertRaises(IndexError, pad_data, data, final_size, east_bound, west_bound)
def test_get_area_def(self):
"""Test getting the area def."""
area = self.reader.get_area_def(DatasetID('HRV'))
self.assertEqual(area.area_extent,
(-45561979844414.07, -3720765401003.719, 45602912357076.38, 77771774058.38356))
proj_dict = area.proj_dict
self.assertEqual(proj_dict['a'], 6378169.0)
self.assertEqual(proj_dict['b'], 6356583.8)
self.assertEqual(proj_dict['h'], 35785831.0)
self.assertEqual(proj_dict['lon_0'], 44.0)
self.assertEqual(proj_dict['proj'], 'geos')
self.assertEqual(proj_dict['units'], 'm')
self.reader.fill_hrv = False
area = self.reader.get_area_def(DatasetID('HRV'))
self.assertEqual(area.defs[0].area_extent,
(-22017598561055.01, -2926674655354.9604, 23564847539690.22, 77771774058.38356))
self.assertEqual(area.defs[1].area_extent,
(-30793529275853.656, -3720765401003.719, 14788916824891.568, -2926674655354.9604))
class TestHRITMSGFileHandler(unittest.TestCase):
"""Test the HRITFileHandler."""
@mock.patch('satpy.readers.seviri_l1b_hrit.np.fromfile')
def setUp(self, fromfile):
"""Set up the hrit file handler for testing."""
m = mock.mock_open()
fromfile.return_value = np.array([(1, 2)], dtype=[('total_header_length', int),
('hdr_id', int)])
with mock.patch('satpy.readers.hrit_base.open', m, create=True) as newopen:
with mock.patch('satpy.readers.seviri_l1b_hrit.CHANNEL_NAMES'):
with mock.patch.object(HRITMSGFileHandler, '_get_hd', new=new_get_hd):
newopen.return_value.__enter__.return_value.tell.return_value = 1
prologue = mock.MagicMock()
prologue.prologue = {"SatelliteStatus": {"SatelliteDefinition": {"SatelliteId": 324,
"NominalLongitude": 47}},
'GeometricProcessing': {'EarthModel': {'TypeOfEarthModel': 2,
'NorthPolarRadius': 10,
'SouthPolarRadius': 10,
'EquatorialRadius': 10}},
'ImageDescription': {'ProjectionDescription': {'LongitudeOfSSP': 0.0}}}
prologue.get_satpos.return_value = None, None, None
prologue.get_earth_radii.return_value = None, None
self.reader = HRITMSGFileHandler(
'filename',
{'platform_shortname': 'MSG3',
'start_time': datetime(2016, 3, 3, 0, 0),
'service': 'MSG'},
{'filetype': 'info'},
prologue,
mock.MagicMock())
ncols = 3712
nlines = 464
nbits = 10
self.reader.mda['number_of_bits_per_pixel'] = nbits
self.reader.mda['number_of_lines'] = nlines
self.reader.mda['number_of_columns'] = ncols
self.reader.mda['data_field_length'] = nlines * ncols * nbits
self.reader.mda['cfac'] = 5
self.reader.mda['lfac'] = 5
self.reader.mda['coff'] = 10
self.reader.mda['loff'] = 10
self.reader.mda['projection_parameters'] = {}
self.reader.mda['projection_parameters']['a'] = 6378169.0
self.reader.mda['projection_parameters']['b'] = 6356583.8
self.reader.mda['projection_parameters']['h'] = 35785831.0
self.reader.mda['projection_parameters']['SSP_longitude'] = 44
self.reader.mda['projection_parameters']['SSP_latitude'] = 0.0
self.reader.mda['orbital_parameters'] = {}
self.reader.mda['orbital_parameters']['satellite_nominal_longitude'] = 47
self.reader.mda['orbital_parameters']['satellite_nominal_latitude'] = 0.0
self.reader.mda['orbital_parameters']['satellite_actual_longitude'] = 47.5
self.reader.mda['orbital_parameters']['satellite_actual_latitude'] = -0.5
self.reader.mda['orbital_parameters']['satellite_actual_altitude'] = 35783328
tline = np.zeros(nlines, dtype=[('days', '>u2'), ('milliseconds', '>u4')])
tline['days'][1:-1] = 21246 * np.ones(nlines-2) # 2016-03-03
tline['milliseconds'][1:-1] = np.arange(nlines-2)
self.reader.mda['image_segment_line_quality'] = {'line_mean_acquisition': tline}
def test_get_xy_from_linecol(self):
"""Test get_xy_from_linecol."""
x__, y__ = self.reader.get_xy_from_linecol(0, 0, (10, 10), (5, 5))
self.assertEqual(-131072, x__)
self.assertEqual(131072, y__)
x__, y__ = self.reader.get_xy_from_linecol(10, 10, (10, 10), (5, 5))
self.assertEqual(0, x__)
self.assertEqual(0, y__)
x__, y__ = self.reader.get_xy_from_linecol(20, 20, (10, 10), (5, 5))
self.assertEqual(131072, x__)
self.assertEqual(-131072, y__)
def test_get_area_extent(self):
"""Test getting the area_extent."""
res = self.reader.get_area_extent((20, 20), (10, 10), (5, 5), 33)
exp = (-71717.44995740513, -79266.655216079365,
79266.655216079365, 71717.44995740513)
self.assertTupleEqual(res, exp)
def test_get_area_def(self):
"""Test getting the area def."""
area = self.reader.get_area_def(DatasetID('VIS006'))
proj_dict = area.proj_dict
self.assertEqual(proj_dict['a'], 6378169.0)
self.assertEqual(proj_dict['b'], 6356583.8)
self.assertEqual(proj_dict['h'], 35785831.0)
self.assertEqual(proj_dict['lon_0'], 44.0)
self.assertEqual(proj_dict['proj'], 'geos')
self.assertEqual(proj_dict['units'], 'm')
self.assertEqual(area.area_extent,
(-77771774058.38356, -3720765401003.719,
30310525626438.438, 77771774058.38356))
# Data shifted by 1.5km to N-W
self.reader.mda['offset_corrected'] = False
area = self.reader.get_area_def(DatasetID('VIS006'))
self.assertEqual(area.area_extent,
(-77771772558.38356, -3720765402503.719,
30310525627938.438, 77771772558.38356))
@mock.patch('satpy.readers.hrit_base.np.memmap')
def test_read_band(self, memmap):
"""Test reading a band."""
nbits = self.reader.mda['number_of_bits_per_pixel']
memmap.return_value = np.random.randint(0, 256,
size=int((464 * 3712 * nbits) / 8),
dtype=np.uint8)
res = self.reader.read_band('VIS006', None)
self.assertEqual(res.shape, (464, 3712))
@mock.patch('satpy.readers.hrit_base.HRITFileHandler.__init__', return_value=None)
@mock.patch('satpy.readers.seviri_l1b_hrit.HRITMSGFileHandler._get_header', autospec=True)
@mock.patch('satpy.readers.seviri_base.SEVIRICalibrationHandler._convert_to_radiance')
def test_calibrate(self, _convert_to_radiance, get_header, *mocks):
"""Test selection of calibration coefficients."""
shp = (10, 10)
counts = xr.DataArray(np.zeros(shp))
nominal_gain = np.arange(1, 13)
nominal_offset = np.arange(-1, -13, -1)
gsics_gain = np.arange(0.1, 1.3, 0.1)
gsics_offset = np.arange(-0.1, -1.3, -0.1)
# Mock prologue & epilogue
pro = mock.MagicMock(prologue={'RadiometricProcessing': {
'Level15ImageCalibration': {'CalSlope': nominal_gain,
'CalOffset': nominal_offset},
'MPEFCalFeedback': {'GSICSCalCoeff': gsics_gain,
'GSICSOffsetCount': gsics_offset}
}})
epi = mock.MagicMock(epilogue=None)
# Mock header readout
mda = {'image_segment_line_quality': {'line_validity': np.zeros(shp[0]),
'line_radiometric_quality': np.zeros(shp[0]),
'line_geometric_quality': np.zeros(shp[0])}}
def get_header_patched(self):
self.mda = mda
get_header.side_effect = get_header_patched
# Test selection of calibration coefficients
#
# a) Default: Nominal calibration
reader = HRITMSGFileHandler(filename=None, filename_info=None, filetype_info=None,
prologue=pro, epilogue=epi)
for ch_id, ch_name in CHANNEL_NAMES.items():
reader.channel_name = ch_name
reader.mda['spectral_channel_id'] = ch_id
reader.calibrate(data=counts, calibration='radiance')
_convert_to_radiance.assert_called_with(mock.ANY, nominal_gain[ch_id - 1],
nominal_offset[ch_id - 1])
# b) GSICS calibration for IR channels, nominal calibration for VIS channels
reader = HRITMSGFileHandler(filename=None, filename_info=None, filetype_info=None,
prologue=pro, epilogue=epi, calib_mode='GSICS')
for ch_id, ch_name in CHANNEL_NAMES.items():
if ch_name in VIS_CHANNELS:
gain, offset = nominal_gain[ch_id - 1], nominal_offset[ch_id - 1]
else:
gain, offset = gsics_gain[ch_id - 1], gsics_offset[ch_id - 1]
reader.channel_name = ch_name
reader.mda['spectral_channel_id'] = ch_id
reader.calibrate(data=counts, calibration='radiance')
_convert_to_radiance.assert_called_with(mock.ANY, gain, offset)
# c) External calibration coefficients for selected channels, GSICS coefs for remaining
# IR channels, nominal coefs for remaining VIS channels
coefs = {'VIS006': {'gain': 1.234, 'offset': -0.1},
'IR_108': {'gain': 2.345, 'offset': -0.2}}
reader = HRITMSGFileHandler(filename=None, filename_info=None, filetype_info=None,
prologue=pro, epilogue=epi, ext_calib_coefs=coefs,
calib_mode='GSICS')
for ch_id, ch_name in CHANNEL_NAMES.items():
if ch_name in coefs.keys():
gain, offset = coefs[ch_name]['gain'], coefs[ch_name]['offset']
elif ch_name not in VIS_CHANNELS:
gain, offset = gsics_gain[ch_id - 1], gsics_offset[ch_id - 1]
else:
gain, offset = nominal_gain[ch_id - 1], nominal_offset[ch_id - 1]
reader.channel_name = ch_name
reader.mda['spectral_channel_id'] = ch_id
reader.calibrate(data=counts, calibration='radiance')
_convert_to_radiance.assert_called_with(mock.ANY, gain, offset)
# d) Invalid mode
self.assertRaises(ValueError, HRITMSGFileHandler, filename=None, filename_info=None,
filetype_info=None, prologue=pro, epilogue=epi, calib_mode='invalid')
@mock.patch('satpy.readers.seviri_l1b_hrit.HRITMSGFileHandler._get_timestamps')
@mock.patch('satpy.readers.seviri_l1b_hrit.HRITFileHandler.get_dataset')
@mock.patch('satpy.readers.seviri_l1b_hrit.HRITMSGFileHandler.calibrate')
def test_get_dataset(self, calibrate, parent_get_dataset, _get_timestamps):
"""Test getting the dataset."""
key = mock.MagicMock(calibration='calibration')
info = {'units': 'units', 'wavelength': 'wavelength', 'standard_name': 'standard_name'}
timestamps = np.array([1, 2, 3], dtype='datetime64[ns]')
parent_get_dataset.return_value = mock.MagicMock()
calibrate.return_value = xr.DataArray(data=np.zeros((3, 3)), dims=('y', 'x'))
_get_timestamps.return_value = timestamps
res = self.reader.get_dataset(key, info)
# Test method calls
parent_get_dataset.assert_called_with(key, info)
calibrate.assert_called_with(parent_get_dataset(), key.calibration)
# Test attributes (just check if raw metadata is there and then remove it before checking the remaining
# attributes)
attrs_exp = info.copy()
attrs_exp.update({
'platform_name': self.reader.platform_name,
'sensor': 'seviri',
'satellite_longitude': self.reader.mda['projection_parameters']['SSP_longitude'],
'satellite_latitude': self.reader.mda['projection_parameters']['SSP_latitude'],
'satellite_altitude': self.reader.mda['projection_parameters']['h'],
'orbital_parameters': {'projection_longitude': 44,
'projection_latitude': 0.,
'projection_altitude': 35785831.0,
'satellite_nominal_longitude': 47,
'satellite_nominal_latitude': 0.0,
'satellite_actual_longitude': 47.5,
'satellite_actual_latitude': -0.5,
'satellite_actual_altitude': 35783328},
'georef_offset_corrected': self.reader.mda['offset_corrected']
})
self.assertIn('raw_metadata', res.attrs)
res.attrs.pop('raw_metadata')
self.assertDictEqual(attrs_exp, res.attrs)
# Test timestamps
self.assertTrue(np.all(res['acq_time'] == timestamps))
self.assertEqual(res['acq_time'].attrs['long_name'], 'Mean scanline acquisition time')
def test_get_raw_mda(self):
"""Test provision of raw metadata."""
self.reader.mda = {'segment': 1, 'loff': 123}
self.reader.prologue_.reduce = lambda max_size: {'prologue': 1}
self.reader.epilogue_.reduce = lambda max_size: {'epilogue': 1}
expected = {'prologue': 1, 'epilogue': 1, 'segment': 1}
self.assertDictEqual(self.reader._get_raw_mda(), expected)
# Make sure _get_raw_mda() doesn't modify the original dictionary
self.assertIn('loff', self.reader.mda)
def test_get_timestamps(self):
"""Test getting the timestamps."""
tline = self.reader._get_timestamps()
# First and last scanline have invalid timestamps (space)
self.assertTrue(np.isnat(tline[0]))
self.assertTrue(np.isnat(tline[-1]))
# Test remaining lines
year = tline.astype('datetime64[Y]').astype(int) + 1970
month = tline.astype('datetime64[M]').astype(int) % 12 + 1
day = (tline.astype('datetime64[D]') - tline.astype('datetime64[M]') + 1).astype(int)
msec = (tline - tline.astype('datetime64[D]')).astype(int)
self.assertTrue(np.all(year[1:-1] == 2016))
self.assertTrue(np.all(month[1:-1] == 3))
self.assertTrue(np.all(day[1:-1] == 3))
self.assertTrue(np.all(msec[1:-1] == np.arange(len(tline) - 2)))
def test_get_header(self):
# Make sure that the actual satellite position is only included if available
self.reader.mda['orbital_parameters'] = {}
self.reader.prologue_.get_satpos.return_value = 1, 2, 3
self.reader._get_header()
self.assertIn('satellite_actual_longitude', self.reader.mda['orbital_parameters'])
self.reader.mda['orbital_parameters'] = {}
self.reader.prologue_.get_satpos.return_value = None, None, None
self.reader._get_header()
self.assertNotIn('satellite_actual_longitude', self.reader.mda['orbital_parameters'])
class TestHRITMSGPrologueFileHandler(unittest.TestCase):
"""Test the HRIT prologue file handler."""
@mock.patch('satpy.readers.seviri_l1b_hrit.HRITMSGPrologueFileHandler.__init__', return_value=None)
def setUp(self, *mocks):
"""Set up the test case."""
self.reader = HRITMSGPrologueFileHandler()
self.reader.satpos = None
self.reader.prologue = {
'GeometricProcessing': {
'EarthModel': {
'EquatorialRadius': 6378.169,
'NorthPolarRadius': 6356.5838,
'SouthPolarRadius': 6356.5838
}
},
'ImageAcquisition': {
'PlannedAcquisitionTime': {
'TrueRepeatCycleStart': datetime(2006, 1, 1, 12, 15, 9, 304888)
}
},
'SatelliteStatus': {
'Orbit': {
'OrbitPolynomial': {
'StartTime': np.array([
[datetime(2006, 1, 1, 6), datetime(2006, 1, 1, 12), datetime(2006, 1, 1, 18),
datetime(1958, 1, 1, 0)]]),
'EndTime': np.array([
[datetime(2006, 1, 1, 12), datetime(2006, 1, 1, 18), datetime(2006, 1, 2, 0),
datetime(1958, 1, 1, 0)]]),
'X': [np.zeros(8),
[8.41607082e+04, 2.94319260e+00, 9.86748617e-01, -2.70135453e-01,
-3.84364650e-02, 8.48718433e-03, 7.70548174e-04, -1.44262718e-04],
np.zeros(8)],
'Y': [np.zeros(8),
[-5.21170255e+03, 5.12998948e+00, -1.33370453e+00, -3.09634144e-01,
6.18232793e-02, 7.50505681e-03, -1.35131011e-03, -1.12054405e-04],
np.zeros(8)],
'Z': [np.zeros(8),
[-6.51293855e+02, 1.45830459e+02, 5.61379400e+01, -3.90970565e+00,
-7.38137565e-01, 3.06131644e-02, 3.82892428e-03, -1.12739309e-04],
np.zeros(8)],
}
}
}
}
self.reader._reduced = None
@mock.patch('satpy.readers.seviri_l1b_hrit.HRITMSGPrologueFileHandler.read_prologue')
@mock.patch('satpy.readers.hrit_base.HRITFileHandler.__init__', autospec=True)
def test_extra_kwargs(self, init, *mocks):
"""Test whether the prologue file handler accepts extra keyword arguments."""
def init_patched(self, *args, **kwargs):
self.mda = {}
init.side_effect = init_patched
HRITMSGPrologueFileHandler(filename=None,
filename_info={'service': ''},
filetype_info=None,
ext_calib_coefs={},
mda_max_array_size=123,
calib_mode='nominal')
def test_find_orbit_coefs(self):
"""Test identification of orbit coefficients."""
# Contiguous validity intervals (that's the norm)
self.assertEqual(self.reader._find_orbit_coefs(), 1)
# No interval enclosing the given timestamp ...
# a) closest interval should be selected (if not too far away)
self.reader.prologue['SatelliteStatus'] = {
'Orbit': {
'OrbitPolynomial': {
'StartTime': np.array([
[datetime(2006, 1, 1, 10), datetime(2006, 1, 1, 13)]]),
'EndTime': np.array([
[datetime(2006, 1, 1, 12), datetime(2006, 1, 1, 18)]])
}
}
}
self.assertEqual(self.reader._find_orbit_coefs(), 0)
# b) closest interval too far away
self.reader.prologue['SatelliteStatus'] = {
'Orbit': {
'OrbitPolynomial': {
'StartTime': np.array([
[datetime(2006, 1, 1, 0), datetime(2006, 1, 1, 18)]]),
'EndTime': np.array([
[datetime(2006, 1, 1, 4), datetime(2006, 1, 1, 22)]])
}
}
}
self.assertRaises(NoValidOrbitParams, self.reader._find_orbit_coefs)
# Overlapping intervals -> most recent interval should be selected
self.reader.prologue['SatelliteStatus'] = {
'Orbit': {
'OrbitPolynomial': {
'StartTime': np.array([
[datetime(2006, 1, 1, 6), datetime(2006, 1, 1, 10)]]),
'EndTime': np.array([
[datetime(2006, 1, 1, 13), datetime(2006, 1, 1, 18)]])
}
}
}
self.assertEqual(self.reader._find_orbit_coefs(), 1)
# No valid coefficients at all
self.reader.prologue['SatelliteStatus'] = {
'Orbit': {
'OrbitPolynomial': {
'StartTime': np.array([
[datetime(1958, 1, 1, 0), datetime(1958, 1, 1)]]),
'EndTime': np.array([
[datetime(1958, 1, 1, 0), datetime(1958, 1, 1)]])
}
}
}
self.assertRaises(NoValidOrbitParams, self.reader._find_orbit_coefs)
@mock.patch('satpy.readers.seviri_l1b_hrit.HRITMSGPrologueFileHandler._find_orbit_coefs')
def test_get_satpos_cart(self, find_orbit_coefs):
"""Test satellite position in cartesian coordinates."""
find_orbit_coefs.return_value = 1
x, y, z = self.reader._get_satpos_cart()
self.assertTrue(np.allclose([x, y, z], [42078421.37095518, -2611352.744615312, -419828.9699940758]))
@mock.patch('satpy.readers.seviri_l1b_hrit.HRITMSGPrologueFileHandler._get_satpos_cart')
def test_get_satpos(self, get_satpos_cart):
"""Test satellite position in spherical coordinates."""
get_satpos_cart.return_value = [42078421.37095518, -2611352.744615312, -419828.9699940758]
lon, lat, dist = self.reader.get_satpos()
self.assertTrue(np.allclose(lon, lat, dist), [-3.5511754052132387, -0.5711189258409902, 35783328.146167226])
# Test cache
self.reader.get_satpos()
self.assertEqual(get_satpos_cart.call_count, 1)
# No valid coefficients
self.reader.satpos = None # reset cache
get_satpos_cart.side_effect = NoValidOrbitParams
self.reader.prologue['ImageAcquisition']['PlannedAcquisitionTime'][
'TrueRepeatCycleStart'] = datetime(2000, 1, 1)
self.assertTupleEqual(self.reader.get_satpos(), (None, None, None))
def test_get_earth_radii(self):
"""Test readout of earth radii."""
earth_model = self.reader.prologue['GeometricProcessing']['EarthModel']
earth_model['EquatorialRadius'] = 2
earth_model['NorthPolarRadius'] = 1
earth_model['SouthPolarRadius'] = 2
a, b = self.reader.get_earth_radii()
self.assertEqual(a, 2000)
self.assertEqual(b, 1500)
@mock.patch('satpy.readers.seviri_l1b_hrit.utils.reduce_mda')
def test_reduce(self, reduce_mda):
"""Test metadata reduction."""
reduce_mda.return_value = 'reduced'
# Set buffer
self.assertEqual(self.reader.reduce(123), 'reduced')
reduce_mda.assert_called()
# Read buffer
reduce_mda.reset_mock()
self.reader._reduced = 'red'
self.assertEqual(self.reader.reduce(123), 'red')
reduce_mda.assert_not_called()
class TestHRITMSGEpilogueFileHandler(unittest.TestCase):
"""Test the HRIT epilogue file handler."""
@mock.patch('satpy.readers.seviri_l1b_hrit.HRITMSGEpilogueFileHandler.read_epilogue')
@mock.patch('satpy.readers.hrit_base.HRITFileHandler.__init__', autospec=True)
def setUp(self, init, *mocks):
"""Set up the test case."""
def init_patched(self, *args, **kwargs):
self.mda = {}
init.side_effect = init_patched
self.reader = HRITMSGEpilogueFileHandler(filename=None,
filename_info={'service': ''},
filetype_info=None,
calib_mode='nominal')
@mock.patch('satpy.readers.seviri_l1b_hrit.HRITMSGEpilogueFileHandler.read_epilogue')
@mock.patch('satpy.readers.hrit_base.HRITFileHandler.__init__', autospec=True)
def test_extra_kwargs(self, init, *mocks):
"""Test whether the epilogue file handler accepts extra keyword arguments."""
def init_patched(self, *args, **kwargs):
self.mda = {}
init.side_effect = init_patched
HRITMSGEpilogueFileHandler(filename=None,
filename_info={'service': ''},
filetype_info=None,
ext_calib_coefs={},
mda_max_array_size=123,
calib_mode='nominal')
@mock.patch('satpy.readers.seviri_l1b_hrit.utils.reduce_mda')
def test_reduce(self, reduce_mda):
"""Test metadata reduction."""
reduce_mda.return_value = 'reduced'
# Set buffer
self.assertEqual(self.reader.reduce(123), 'reduced')
reduce_mda.assert_called()
# Read buffer
reduce_mda.reset_mock()
self.reader._reduced = 'red'
self.assertEqual(self.reader.reduce(123), 'red')
reduce_mda.assert_not_called()
def suite():
"""Test suite for test_scene."""
loader = unittest.TestLoader()
mysuite = unittest.TestSuite()
tests = [TestHRITMSGFileHandler, TestHRITMSGPrologueFileHandler, TestHRITMSGEpilogueFileHandler,
TestHRITMSGFileHandlerHRV]
for test in tests:
mysuite.addTest(loader.loadTestsFromTestCase(test))
return mysuite
if __name__ == '__main__':
unittest.main()