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
|
#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright (c) 2018-2022 Pytroll developers
#
#
# This program 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.
#
# This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
"""Read the FY-4A/B AGRI relative spectral responses.
Data from http://satellite.nsmc.org.cn/PortalSite/StaticContent/DocumentDownload.aspx?TypeID=590
"""
import os
import numpy as np
from pyspectral.raw_reader import InstrumentRSR
from pyspectral.utils import INSTRUMENTS
from pyspectral.utils import convert2hdf5 as tohdf5
from pyspectral.utils import get_logger, logging_on
FY4_AGRI_BAND_NAMES = ['ch1', 'ch2', 'ch3', 'ch4', 'ch5', 'ch6', 'ch7', 'ch8',
'ch9', 'ch10', 'ch11', 'ch12', 'ch13', 'ch14', 'ch15']
BANDNAME_SCALE2MICROMETERS = {'FY-4A': {'ch1': 0.001,
'ch2': 0.001,
'ch3': 0.001,
'ch4': 1.0,
'ch5': 1.0,
'ch6': 1.0,
'ch7': 1.0,
'ch8': 1.0,
'ch9': 1.0,
'ch10': 1.0,
'ch11': 1.0,
'ch12': 1.0,
'ch13': 1.0,
'ch14': 1.0},
'FY-4B': {'ch1': 0.001,
'ch2': 0.001,
'ch3': 0.001,
'ch4': 0.001,
'ch5': 0.001,
'ch6': 0.001,
'ch7': 1.0,
'ch8': 1.0,
'ch9': 1.0,
'ch10': 1.0,
'ch11': 1.0,
'ch12': 1.0,
'ch13': 1.0,
'ch14': 1.0,
'ch15': 1.0}}
class AGRIRSR(InstrumentRSR):
"""Container for the FY-4 AGRI RSR data."""
def __init__(self, bandname, platform_name):
"""Initialise the FY-4 AGRI relative spectral response data."""
if platform_name == 'FY-4A':
super(AGRIRSR, self).__init__(bandname, platform_name, FY4_AGRI_BAND_NAMES[:-1])
else:
super(AGRIRSR, self).__init__(bandname, platform_name, FY4_AGRI_BAND_NAMES)
self.instrument = INSTRUMENTS.get(platform_name, 'agri')
if type(self.instrument) is list:
self.instrument = 'agri'
self._get_options_from_config()
self._get_bandfilenames()
LOG.debug("Filenames: %s", str(self.filenames))
if self.filenames[bandname] and os.path.exists(self.filenames[bandname]):
self.requested_band_filename = self.filenames[bandname]
scale = BANDNAME_SCALE2MICROMETERS[platform_name].get(bandname)
if scale:
self._load(scale=scale)
else:
LOG.error(
"Failed determine the scale used to convert to wavelength in micrometers - channel = %s", bandname)
raise AttributeError('no scale for bandname %s', bandname)
else:
LOG.warning("Couldn't find an existing file for this band: %s",
str(self.bandname))
self.filename = self.requested_band_filename
def _load(self, scale=0.001):
"""Load the AGRI RSR data for the band requested.
Wavelength is given in nanometers.
"""
data = np.genfromtxt(self.requested_band_filename,
unpack=True, delimiter='\t',
names=['wavelength',
'response'],
skip_header=1)
wavelength = data[0] * scale
response = data[1]
# Response can be either 0-1 or 0-100 depending on RSR source - this scales to 0-1 range.
if np.nanmax(response > 1):
response = response / 100.
# Cut unneeded points
pts = np.argwhere(response > 0.001)
wavelength = np.squeeze(wavelength[pts])
response = np.squeeze(response[pts])
self.rsr = {'wavelength': wavelength, 'response': response}
def convert_agri():
"""Read original AGRI RSR data and convert to common Pyspectral hdf5 format."""
# For FY-4A
# tohdf5(AGRIRSR, 'FY-4A', FY4_AGRI_BAND_NAMES[:-1])
# For FY-4B
tohdf5(AGRIRSR, 'FY-4B', FY4_AGRI_BAND_NAMES)
if __name__ == "__main__":
LOG = get_logger(__name__)
logging_on()
convert_agri()
|
