show_pointings.py
4.42 KB
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
#! /usr/bin/env python
# ==========================================================================
# Display pointings in observation definition XML file
#
# Copyright (C) 2017 Juergen Knoedlseder
#
# 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/>.
#
# ==========================================================================
import sys
import gammalib
import cscripts
try:
import matplotlib.pyplot as plt
plt.figure()
plt.close()
except (ImportError, RuntimeError):
print('This script needs the "matplotlib" module')
sys.exit()
# =============================== #
# Extract pointings from XML file #
# =============================== #
def get_pointings(filename):
"""
Extract pointings from XML file
Parameters
----------
filename : str
File name of observation definition XML file
Returns
-------
pnt : list of dict
Pointings
"""
# Initialise pointings
pnt = []
# Open XML file
xml = gammalib.GXml(filename)
# Get observation list
obs = xml.element('observation_list')
# Get number of observations
nobs = obs.elements('observation')
# Loop over observations
for i in range(nobs):
# Get observation
run = obs.element('observation', i)
# Get pointing parameter
npars = run.elements('parameter')
ra = None
dec = None
south = False
for k in range(npars):
par = run.element('parameter', k)
if par.attribute('name') == 'Pointing':
ra = float(par.attribute('ra'))
dec = float(par.attribute('dec'))
if par.attribute('name') == 'Calibration':
if 'South' in par.attribute('response'):
south = True
else:
south = False
if ra != None:
p = gammalib.GSkyDir()
p.radec_deg(ra, dec)
entry = {'l': p.l_deg(), 'b': p.b_deg(), 'ra': ra, 'dec': dec, 'south': south}
pnt.append(entry)
# Return pointings
return pnt
# ================ #
# Plot information #
# ================ #
def plot_pointings(pnt, plotfile):
"""
Plot information
Parameters
----------
pnt : list of dict
Pointings
plotfile : str
Plot filename
"""
# Create figure
plt.figure()
# Setup figure
ax = plt.gca()
ax.cla()
ax.set_xlim((180, -180))
ax.set_ylim((-90, 90))
# Loop over pointings
for p in pnt:
# Get longitude
l = p['l']
if l > 180.0:
l = l - 360.0
# Set color
if p['south']:
color='r'
else:
color='b'
# Set circle
circle = plt.Circle((l, p['b']), 4.0, color=color, fill=False)
# Add circle
ax.add_artist(circle)
# Plot title and labels
plt.xlabel('Galactic longitude (deg)')
plt.ylabel('Galactic latitude (deg)')
plt.title('Pointings')
# Show plots or save it into file
if len(plotfile) > 0:
plt.savefig(plotfile)
else:
plt.show()
# Return
return
# ============== #
# Show pointings #
# ============== #
def show_pointings():
"""
Show pointings
"""
# Set usage string
usage = 'show_pointings.py [-p plotfile] file'
# Set default options
options = [{'option': '-p', 'value': ''}]
# Get arguments and options from command line arguments
args, options = cscripts.ioutils.get_args_options(options, usage)
# Extract script parameters from options
plotfile = options[0]['value']
# Get pointings
pnt = get_pointings(args[0])
# Plot pointings
plot_pointings(pnt, plotfile)
# Return
return
# ======================== #
# Main routine entry point #
# ======================== #
if __name__ == '__main__':
# Show pointings
show_pointings()