def hname(ra):
one = str(
(int(str(ephem.hours(ra * n.pi / 180)).split(':')[0]) + 100000))[-2::]
two = str(
(int(str(ephem.hours(ra * n.pi / 180)).split(':')[1]) + 100000))[-2::]
ret = one + two
return ret
def calc_local_hour(yr, month, day, H_UTC, min_UTC, lon):
# function to calculate the local solar time
# (i.e. the hour angle of the sun + 12 h)
# inputs
# date UTC : yr, month, day, H_UTC, min_UTC
# lon: longitude in degrees East
# outputs
# local solar hour (decimal)
import ephem
import datetime
sun = ephem.Sun()
# set date, longitude manually
o = ephem.Observer()
o.date = datetime.datetime(yr, month, day, H_UTC, min_UTC,
0) # some utc time ; could replace 0 by seconds
o.lon = lon * ephem.degree #
sun.compute(o)
hour_angle = o.sidereal_time() - sun.ra
solartime = ephem.hours(hour_angle +
ephem.hours('12:00')).norm # norm for 24h
# nb: lat has no impact on solar time
time_str = str(solartime)
h, m, s = time_str.split(':')
local_h = int(h) + int(m) / 60. + float(s) / 3600.
return local_h
def string2RADEC(st):
'''Given a string, try to convert into internal ephem angle.'''
fields = map(str,st.strip().split())
if len(fields) == 2:
# Try RA DEC in decimal degrees
try:
RA,DEC = map(float, fields)
return RA,DEC
except:
# Try as sexadecimal notation
try:
RA,DEC = hours(fields[0]),degrees(fields[1])
return RA*180/pi,DEC*180/pi
except:
# Fail!
return None,None
elif len(fields) in [4,6]:
# assume RA and DEC have the same number of fields
try:
nf = len(fields)
RA = ":".join(fields[0:nf/2])
DEC = ":".join(fields[nf/2:])
RA,DEC = hours(RA)*180/pi,degrees(DEC)*180/pi
return RA,DEC
except:
# Fail!
return None,None
else:
# Dunno!
return None,None
def equation_of_time(date):
"""returns equation of time, the suns transit time,
the moons transit-, antitransittime, age and percent illumination
"""
obs = ephem.Observer()
obs.date = date
s = ephem.Sun()
m = ephem.Moon()
s.compute(date)
m.compute(date)
transs = str(obs.next_transit(s, start=date))[-8:-3]
antim = str(obs.next_antitransit(m, start=date))[-8:-3]
transm = str(obs.next_transit(m, start=date))[-8:-3]
m.compute(date + 0.5)
phase = int(round(m.phase))
age = int(round((date + 0.5) - ephem.previous_new_moon(date + 0.5)))
s.compute(date - 0.1)
obs.date = date - 0.1
eqt00 = ephem.hours(round((obs.next_antitransit(s) - date) * 86400) / 86400 * 2 * math.pi)
eqt00 = str(eqt00)[-8:-3]
eqt12 = ephem.hours(round((obs.next_transit(s) - (date + 0.5)) * 86400) / 86400 * 2 * math.pi)
eqt12 = str(eqt12)[-8:-3]
return eqt00, eqt12, transs, transm, antim, age, phase
def click(event):
global cnt
if event.button == 3:
lon, lat = map(event.xdata, event.ydata, inverse=True)
if opts.osys == 'eq': lon = (360 - lon) % 360
lon *= a.img.deg2rad
lat *= a.img.deg2rad
ra, dec = ephem.hours(lon), ephem.degrees(lat)
x, y, z = a.coord.radec2eq((ra, dec))
flx = h[(x, y, z)]
print '#%d (RA,DEC): (%s, %s), Jy: %f' % (cnt, ra, dec, flx)
cnt += 1
elif event.button == 2:
lon, lat = map(event.xdata, event.ydata, inverse=True)
if opts.osys == 'eq': lon = (360 - lon) % 360
lon *= a.img.deg2rad
lat *= a.img.deg2rad
ra, dec = ephem.hours(lon), ephem.degrees(lat)
x, y, z = a.coord.radec2eq((ra, dec))
#flx = h[(x,y,z)]
crd = [mk_arr(c, dtype=np.double) for c in (x, y, z)]
px, wgts = h.crd2px(*crd, **{'interpolate': 1})
flx = np.sum(h[px], axis=-1)
print '#%d (RA,DEC): (%s, %s), Jy: %f (4px sum)' % (cnt, ra, dec,
flx)
cnt += 1
else:
return
def hourAngle(self,ra):
self.observer.date=ephem.now()
self.sideral=self.observer.sidereal_time()
ra_=ephem.hours(ra-self.sideral).znorm
if ra_==ephem.hours("24:00:00"):
ra=ephem.hours("00:00:00")
return ra_
def _solartime(lon, lat, date=date, rtn_as_epoch=True):
"""
Get solartime for location (lat, lon) and date
Returns
---
(float) Epoch time
"""
# --- get sunrise and sunset for location
o = ephem.Observer()
# set lat (decimal?), lon (decimal?), and date (UTC)
o.lat = str(lat)
o.long = str(lon)
o.date = date
# planetary body
s = ephem.Sun()
# Compute sun vs observer
s.compute(o)
# below code was adapted from stackoverflow (Credit: J.F. Sebastian)
# http://stackoverflow.com/questions/13314626/local-solar-time-function-from-utc-and-longitude
# sidereal time == ra (right ascension) is the highest point (noon)
hour_angle = o.sidereal_time() - s.ra
s_time = ephem.hours(hour_angle +
ephem.hours('12:00')).norm # norm for 24h
# ephem.hours is a float number that represents an angle in radians
# and converts to/from a string as "hh:mm:ss.ff".
s_time = "%s" % s_time
if len(s_time) != 11:
s_time = '0' + s_time
# return as datetime
s_time = datetime.datetime.strptime(s_time[:8], '%H:%M:%S')
if rtn_as_epoch:
s_time = unix_time(s_time)
return s_time
def convert_eq2ga(ra,
dec,
i_epoch=e.J2000,
o_epoch=None,
degree_in=True,
degree_out=True):
if o_epoch is None:
o_epoch = i_epoch
if degree_in:
ra = e.hours(ra * np.pi / 180.)
dec = e.degrees(dec * np.pi / 180.)
else:
ra = e.hours(ra * np.pi)
dec = e.degrees(dec * np.pi)
coord = e.Equatorial(ra, dec, epoch=i_epoch)
coord = e.Galactic(coord, epoch=o_epoch)
l, b = coord.lon, coord.lat
if degree_out:
l = l * 180. / np.pi
b = b * 180. / np.pi
return l, b
def click(event):
global cnt
if event.button == 3:
lon,lat = map(event.xdata, event.ydata, inverse=True)
print event.xdata,type(event.xdata)
if opts.osys == 'eq': lon = (360 - lon) % 360
lon *= a.img.deg2rad; lat *= a.img.deg2rad
ra,dec = ephem.hours(lon), ephem.degrees(lat)
x,y,z = a.coord.radec2eq((ra,dec))
flx = h[(x,y,z)]
print '#%d (RA,DEC): (%s, %s), Jy: %f' % (cnt, ra, dec, flx)
cnt += 1
elif event.button==2:
lon,lat = map(event.xdata, event.ydata, inverse=True)
if opts.osys == 'eq': lon = (360 - lon) % 360
lon *= a.img.deg2rad; lat *= a.img.deg2rad
ra,dec = ephem.hours(lon), ephem.degrees(lat)
x,y,z = a.coord.radec2eq((ra,dec))
#flx = h[(x,y,z)]
crd = [mk_arr(c, dtype=n.double) for c in (x,y,z)]
px,wgts = h.crd2px(*crd, **{'interpolate':1})
flx = n.sum(h[px],axis=-1)
print '#%d (RA,DEC): (%s, %s), Jy: %f (4px sum)' % (cnt, ra, dec, flx)
cnt += 1
else: return
def dLocation(self):
self.s = ephem.Sun()
self.s.compute(epoch=ephem.now())
if self.nameEdit.text():
self.text1.setText(self.nameEdit.text())
font03 = QFont("Arial", 16)
font03.setBold(True)
self.text1.setFont(font03)
if not self.dateandtimeEdit.text():
self.o.date = ephem.now() # 00:22:07 EDT 06:22:07 UT+1
else:
if self.dateandtimeEdit.text():
self.o.date = self.dateandtimeEdit.text()
self.text1.setText("<b>Obliczenia dla:</b><br/> " +
self.dateandtimeEdit.text())
font03 = QFont("Arial", 16)
font03.setBold(True)
self.text1.setFont(font03)
else:
self.o.date = ephem.now() # 00:22:07 EDT 06:22:07 UT+1
#self.o.date = ephem.now() # 00:22:07 EDT 06:22:07 UT+1
self.s.compute(self.o)
hour_angle = self.o.sidereal_time() - self.s.ra
t = ephem.hours(hour_angle +
ephem.hours('12:00')).norm # .norm for 0..24
self.rad = str(ephem.hours(hour_angle + ephem.hours('12:00')).norm)
# self.result.setText("R.A.: " + str(self.s.a_ra) + " DEC.: " + str(self.s.a_dec))
# self.result2.setText("HOUR ANGLE: " + str(self.rad) + " SIDERAL TIME: " + str(self.o.sidereal_time()))
# self.result3.setText("SUN Altitude: " + str(self.s.alt) + " SUN Azimuth: " + str(self.s.az))
self.result4.setText("R.A.: " + str(self.s.a_ra))
self.result5.setText("DEC.: " + str(self.s.a_dec))
self.result6.setText("HOUR ANGLE: " + str(self.rad))
self.result7.setText("SIDERAL TIME: " + str(self.o.sidereal_time()))
self.result8.setText("SUN Altitude: " + str(self.s.alt))
self.result9.setText("SUN Azimuth: " + str(self.s.az))
def hourAngle(self, ra):
self.observer.date = ephem.now()
self.sideral = self.observer.sidereal_time()
ra_ = ephem.hours(ra - self.sideral).znorm
if ra_ == ephem.hours("24:00:00"):
ra = ephem.hours("00:00:00")
return ra_
def get_target_info_table(self, target, time_start=None, time_stop=None,
time_interval=5):
"""Prints a table of hourly airmass data"""
history = self.get_target_info(target, time_start=time_start,
time_stop=time_stop,
time_interval=time_interval)
text = []
format_hdr = '%(date)-16s %(utc)5s %(lmst)5s %(ha)5s %(pa)7s %(am)6s %(ma)6s %(ms)7s'
header = dict(date='Date', utc='UTC', lmst='LMST',
ha='HA', pa='PA', am='AM', ma='MnAlt', ms='MnSep')
hstr = format_hdr % header
text.append(hstr)
text.append('_'*len(hstr))
format_line = '%(date)-16s %(utc)5s %(lmst)5s %(ha)5s %(pa)7.2f %(am)6.2f %(ma)6.2f %(ms)7.2f'
for info in history:
s_date = info.lt.astimezone(self.tz_local).strftime('%d%b%Y %H:%M')
s_utc = info.lt.astimezone(self.tz_utc).strftime('%H:%M')
s_ha = ':'.join(str(ephem.hours(info.ha)).split(':')[:2])
s_lmst = ':'.join(str(ephem.hours(info.lmst)).split(':')[:2])
pa = float(numpy.degrees(info.pang))
am = float(info.airmass)
ma = float(numpy.degrees(info.moon_alt))
ms = float(numpy.degrees(info.moon_sep))
line = dict(date=s_date, utc=s_utc, lmst=s_lmst,
ha=s_ha, pa=pa, am=am, ma=ma, ms=ms)
s_data = format_line % line
text.append(s_data)
return '\n'.join(text)
def __init__(self, ra=None, dec=None, obj=None, session=None):
"""Tracks an object in the sky and collects data.
Takes either a pyephem object, or a ra and dec (not both)
Arguments:
ra (radians): Right ascension of object
dec (radians): Declination of object
obj (ephem.Body): Pyephem object
session (str): Name of observing session (name of data file)
"""
self.obs = ephem.Observer()
self.obs.long, self.obs.lat = ephem.hours(np.deg2rad(LONG)), ephem.degrees(np.deg2rad(LAT))
logger.info("Observer set at (long, lat): {long_}, {lat}".format(long_=self.obs.long, lat=self.obs.lat))
if obj and not (ra or dec):
self.source = obj
elif (ra and dec) and not obj:
self.source = ephem.FixedBody()
self.source._ra = ephem.hours(ra)
self.source._dec = ephem.degrees(dec)
self.source._epoch = ephem.J2000 # for precessing
else:
raise Exception("Only use either (ra, dec) or an ephem obj.")
self.last_home = None
self.session = session
def equation_of_time(date):
"""returns equation of time, the suns transit time,
the moons transit-, antitransittime, age and percent illumination
"""
obs = ephem.Observer()
obs.date = date
s = ephem.Sun()
m = ephem.Moon()
s.compute(date)
m.compute(date)
transs = str(obs.next_transit(s,start=date))[-8:-3]
antim = str(obs.next_antitransit(m,start=date))[-8:-3]
transm = str(obs.next_transit(m,start=date))[-8:-3]
m.compute(date+0.5)
phase = int(round(m.phase))
age = int(round((date+0.5)-ephem.previous_new_moon(date+0.5)))
s.compute(date-0.1)
obs.date = date-0.1
eqt00 = ephem.hours(round((obs.next_antitransit(s)-date)*86400)/86400*2*math.pi)
eqt00 = str(eqt00)[-8:-3]
eqt12 = ephem.hours(round((obs.next_transit(s)-(date+0.5))*86400)/86400*2*math.pi)
eqt12 = str(eqt12)[-8:-3]
return eqt00,eqt12,transs,transm,antim,age,phase
def get_target_info_table(self, target, time_start=None, time_stop=None):
"""Prints a table of hourly airmass data"""
history = self.get_target_info(target,
time_start=time_start,
time_stop=time_stop)
text = ''
format = '%-16s %-5s %-5s %-5s %-5s %-5s %-5s\n'
header = ('Date Local', 'UTC', 'LMST', 'HA', 'PA', 'AM', 'Moon')
hstr = format % header
text += hstr
text += '_' * len(hstr) + '\n'
for info in history:
s_lt = info.lt.strftime('%d%b%Y %H:%M')
s_utc = info.ut.strftime('%H:%M')
s_ha = ':'.join(str(ephem.hours(info.ha)).split(':')[:2])
s_lmst = ':'.join(str(ephem.hours(info.lmst)).split(':')[:2])
#s_pa = round(info.pang*180.0/np.pi, 1)
s_pa = round(info.pang, 1)
s_am = round(info.airmass, 2)
s_ma = round(info.moon_alt, 1)
if s_ma < 0:
s_ma = ''
s_data = format % (s_lt, s_utc, s_lmst, s_ha, s_pa, s_am, s_ma)
text += s_data
return text
def click(event):
global cnt
if event.button == 3:
lon,lat = map(event.xdata, event.ydata, inverse=True)
lon = (180 + kwds['ra'] - lon) % 360
lon *= a.img.deg2rad; lat *= a.img.deg2rad
ra,dec = ephem.hours(lon), ephem.degrees(lat)
xpx = n.around(event.xdata / (kwds['d_ra'] * a.img.deg2rad))
ypx = n.around(event.ydata / (kwds['d_dec'] * a.img.deg2rad))
flx = d[ypx,xpx]
if opts.mode.startswith('log'): flx = 10**flx
print '#%d (RA,DEC): (%s, %s), PX: (%d,%d) Jy: %f' % \
(cnt, ra, dec, xpx, ypx, flx)
cnt += 1
elif event.button == 2:
p.figure(200)
lon,lat = map(event.xdata, event.ydata, inverse=True)
p.plot(cube[lat,lon,:])
lon = (180 + kwds['ra'] - lon) % 360
lon *= a.img.deg2rad; lat *= a.img.deg2rad
ra,dec = ephem.hours(lon), ephem.degrees(lat)
xpx = n.around(event.xdata / (kwds['d_ra'] * a.img.deg2rad))
ypx = n.around(event.ydata / (kwds['d_dec'] * a.img.deg2rad))
flx = d[ypx,xpx]
if opts.mode.startswith('log'): flx = 10**flx
p.title('#%d (RA,DEC): (%s, %s), PX: (%d,%d) Jy: %f' % \
(cnt, ra, dec, xpx, ypx, flx))
cnt += 1
else: return
def click(event):
global cnt
if event.button == 3:
lon, lat = map(event.xdata, event.ydata, inverse=True)
lon = (180 + kwds['ra'] - lon) % 360
lon *= a.img.deg2rad
lat *= a.img.deg2rad
ra, dec = ephem.hours(lon), ephem.degrees(lat)
xpx = n.around(event.xdata / (kwds['d_ra'] * a.img.deg2rad))
ypx = n.around(event.ydata / (kwds['d_dec'] * a.img.deg2rad))
flx = d[ypx, xpx]
if opts.mode.startswith('log'): flx = 10**flx
print '#%d (RA,DEC): (%s, %s), PX: (%d,%d) Jy: %f' % \
(cnt, ra, dec, xpx, ypx, flx)
cnt += 1
elif event.button == 2:
p.figure(200)
lon, lat = map(event.xdata, event.ydata, inverse=True)
p.plot(cube[lat, lon, :])
lon = (180 + kwds['ra'] - lon) % 360
lon *= a.img.deg2rad
lat *= a.img.deg2rad
ra, dec = ephem.hours(lon), ephem.degrees(lat)
xpx = n.around(event.xdata / (kwds['d_ra'] * a.img.deg2rad))
ypx = n.around(event.ydata / (kwds['d_dec'] * a.img.deg2rad))
flx = d[ypx, xpx]
if opts.mode.startswith('log'): flx = 10**flx
p.title('#%d (RA,DEC): (%s, %s), PX: (%d,%d) Jy: %f' % \
(cnt, ra, dec, xpx, ypx, flx))
cnt += 1
else:
return
def solartime(observer, sun=None):
"""
Get Solartime for location of 'observer' relative to 'sun'
Parameters
-------
observer (ephem observer object): Location of the observer
sun (ephem sun object): Which dun to use? (default: our sun)
Returns
-------
(float)
Notes
-------
- Credit: J.F. Sebastian
http://stackoverflow.com/questions/13314626/local-solar-time-function-from-utc-and-longitude
"""
import ephem
if isinstance(sun, type(None)):
ephem.Sun()
# Astronomical math - compute the angle between the sun and observe
sun.compute(observer)
# sidereal time == ra (right ascension) is the highest point (noon)
hour_angle = observer.sidereal_time() - sun.ra
return ephem.hours(hour_angle + ephem.hours('12:00')).norm # norm for 24h
def test_drx_alt_update(self):
"""Test updating TRK_RADEC values with other phase centers."""
project = idf.parse_idf(altFile)
project.runs[0].scans[0].start = "MST 2011 Feb 23 17:00:15"
project.runs[0].scans[0].duration = timedelta(seconds=15)
project.runs[0].scans[0].frequency1 = 75e6
project.runs[0].scans[0].frequency2 = 76e6
project.runs[0].scans[0].ra = ephem.hours('5:30:00')
project.runs[0].scans[0].dec = ephem.degrees('+22:30:00')
project.runs[0].scans[0].alt_phase_centers[0].ra = ephem.hours(
'5:35:00')
project.runs[0].scans[0].alt_phase_centers[1].ra = ephem.hours(
'5:25:00')
self.assertEqual(project.runs[0].scans[0].mjd, 55616)
self.assertEqual(project.runs[0].scans[0].mpm, 15000)
self.assertEqual(project.runs[0].scans[0].dur, 15000)
self.assertEqual(project.runs[0].scans[0].freq1, 1643482384)
self.assertEqual(project.runs[0].scans[0].freq2, 1665395482)
self.assertAlmostEqual(project.runs[0].scans[0].ra, 5.5, 6)
self.assertAlmostEqual(project.runs[0].scans[0].dec, 22.5, 6)
self.assertAlmostEqual(
project.runs[0].scans[0].alt_phase_centers[0].ra, 5.583333, 6)
self.assertAlmostEqual(
project.runs[0].scans[0].alt_phase_centers[1].ra, 5.416667, 6)
def angle_from_hours(s):
"""Creates angle object from sexagesimal string in hours or number in radians."""
try:
# Ephem expects a number or platform-appropriate string (i.e. Unicode on Py3)
return ephem.hours(s)
except TypeError:
# If input is neither, assume that it really wants to be a string
return ephem.hours(_just_gimme_an_ascii_string(s))
def data(self, index, role):
if not index.isValid():
print("whaat?")
return QVariant()
sb = self.arraydata[index.row()]
col = index.column()
if role == Qt.DisplayRole:
if col in [8, 10]:
if sb[col] < 0:
neg = '-'
ha_t = str(ephem.hours(str(abs(sb[col]))))
# noinspection PyCallByClass
ha = QTime.fromString(ha_t, 'h:m:s.z')
else:
neg = ''
ha_t = str(ephem.hours(str(sb[col])))
# noinspection PyCallByClass
ha = QTime.fromString(ha_t, 'h:m:s.z')
hastr = QString("%1").arg(neg + ha.toString('h:mm'))
return QVariant(hastr)
elif col == 6:
h = ephem.hours(str(sb[col] / 15.))
return QVariant(str(h)[:-3])
elif col == 7:
d = ephem.degrees(str(sb[col]))
return QVariant(str(d)[:-2])
elif col in [0, 16, 17, 18, 21, 22, 23, 24]:
return QVariant(QString("%1").arg(sb[col], 0, 'f', 2))
elif col in [9, 19, 20, 25]:
return QVariant(QString("%1").arg(sb[col], 0, 'f', 1))
elif col in [14, 15]:
return QVariant(QString("%1").arg(sb[col], 0, 10))
return QVariant(str(self.arraydata[index.row()][index.column()]))
elif role == Qt.TextAlignmentRole:
if col in [0, 6, 7, 8, 9, 10, 14, 15, 16, 17, 18, 19, 20, 21, 22,
22, 24, 25, 26]:
return QVariant(int(Qt.AlignRight | Qt.AlignVCenter))
if col in [11, 12, 13]:
return QVariant(int(Qt.AlignCenter | Qt.AlignVCenter))
return QVariant(int(Qt.AlignLeft | Qt.AlignVCenter))
elif role == Qt.BackgroundColorRole:
if 0 == index.row() % 2:
c = QVariant(QColor(235, 245, 255))
else:
c = QVariant(QColor(250, 250, 250))
# if sb[19] >= 8.5 and sb[23] <= 0.75 * 1.15:
# changed line to reflect not longer observable in C34-6
# if sb[22] > 0.57 and sb[0] > 0:
# c = QVariant(QColor(130, 250, 82))
if sb[16] > 1.3 and sb[18] > 1.3:
c = QVariant(QColor(255, 110, 110))
return c
elif role == Qt.FontRole:
if col in [0, 18, 20]:
return QVariant(QFont("Cantarel", 10, QFont.Bold))
return QVariant()
def getRA(self, arg):
self.observer.date = ephem.Date(datetime.datetime.utcnow())
self.sideral = self.observer.sidereal_time()
beta = float(self.m.axis1.motorBeta) * self.m.axis1.minMotorStep
ra = ephem.hours(self.sideral + beta).norm
if ra == ephem.hours("24:00:00"):
ra = ephem.hours("00:00:00")
self.RA = ra
return self.RA
def fit_dec(data, start, end, debug=False):
lst = np.load('data/report/3C144_03-28-2014_001926.npz')['lst'][start:end]
data = data[(len(data)-len(lst))/2:-(len(data)-len(lst))/2]
generate_plot(data, dft=True)
source = ephem.FixedBody()
obs = ephem.Observer()
obs.lat = ephem.degrees(37.8732)
obs.long = ephem.degrees(-122.2573)
obs.date = ephem.date('2014/3/28 0:19:26')
source._ra = ephem.hours("5:34:31.95")
source._dec = ephem.degrees("22:00:51.1")
source._epoch = ephem.J2000
source.compute(obs)
hs = np.array(ephem.hours(source.ra) - lst)
# 'Brute force' least squares
lmbda = 2.5 # Wavelength lambda in cm
YBAR = []
By = 1000
cos_dec = np.linspace(0.01,1,500)
A = []
S_SQ = []
# Iterate over baseline lengths in cm
for dec in cos_dec:
C = 2 * np.pi * By/lmbda * dec
x1 = np.cos( C * np.sin(hs) )
x2 = np.sin( C * np.sin(hs) )
X = np.matrix([x1, x2])
ybar, a, s_sq = least_squares(data, X)
S_SQ.append(s_sq)
ybar = np.array(ybar[:,0])
YBAR.append(ybar)
A.append(a)
Dopt = np.argmin(S_SQ)
if debug:
plt.figure()
plt.plot(cos_dec, S_SQ/max(S_SQ))
plt.title('Normalized Residuals for Declination Fit')
plt.savefig('img/crab/residual_dec.png')
plt.figure()
plt.plot(data)
plt.plot(YBAR[Dopt])
plt.title('Least Squares Fit for Declination')
plt.legend(['Filtered', 'Fit'])
plt.savefig('img/crab/fit_dec.png')
print 'By = '+str(By)
print 'delta (deg)= '+str(np.arccos(cos_dec[Dopt])*180/np.pi)
print 'A = '+str(A[Dopt])
return YBAR[Dopt], A[Dopt], np.arccos(cos_dec[Dopt])*180/np.pi
def __init__(self):
port=servers['zmqEngineCmdPort']
super(mainengine,self).__init__('mainengine',port)
CMDs={
chr(6):self.cmd_ack, \
":info": self.cmd_info, \
":FirmWareDate": self.cmd_firware_date, \
":GVF": self.cmd_firware_ver, \
":V": self.cmd_firware_ver, \
":GVD": self.cmd_firware_date, \
":GC": self.cmd_getLocalDate, \
":GL": self.cmd_getLocalTime, \
":GS": self.cmd_getSideralTime, \
":Sr": self.cmd_setTargetRA, \
":Sd": self.cmd_setTargetDEC, \
":MS": self.cmd_slew, \
":Q": self.cmd_stopSlew, \
":Gr": self.cmd_getTargetRA, \
":Gd": self.cmd_getTargetDEC, \
":GR": self.cmd_getTelescopeRA, \
":GD": self.cmd_getTelescopeDEC, \
":RS": self.cmd_setMaxSlewRate, \
":RM": self.cmd_slewRate, \
":Me": self.cmd_pulseE, \
":Mw": self.cmd_pulseW, \
":Mn": self.cmd_pulseN, \
":Ms": self.cmd_pulseS, \
":CM": self.cmd_align2target, \
"@getObserver": self.getObserver, \
"@getGear": self.getGear, \
"@getRA": self.getRA, \
"@getDEC": self.getDEC, \
"@setTrackSpeed": self.setTrackSpeed, \
"@values": self.values
}
self.m=ramps.mount()
self.valuesmsg ={}
self.addCMDs(CMDs)
self.observerInit()
self.targetRA=ephem.hours(0)
self.targetDEC=ephem.degrees(0)
ra=ephem.hours(self.observer.sidereal_time())
dec=ephem.degrees(0)
star = ephem.FixedBody(ra,dec,observer=self.observer,epoch='2016.4')
star.compute(self.observer)
self.RA=star.ra
self.DEC=star.dec
self.alt=star.alt
self.az=star.az
self.pulseStep=ephem.degrees('00:00:01')
a=ephem.degrees('00:20:00')
vRA=-ephem.hours("00:00:01")
vDEC=ephem.degrees("00:00:00")
self.m.trackSpeed(vRA,vDEC)
def equation_of_time(date): # used in twilighttab (section 3)
# returns equation of time, the sun's transit time,
# the moon's transit-, antitransit-time, age and percent illumination.
# (Equation of Time = Mean solar time - Apparent solar time)
py_date = date.tuple()
py_obsdate = datetime.date(py_date[0], py_date[1], py_date[2])
d = ephem.date(date - 30 * ephem.second)
obs = ephem.Observer()
obs.date = d
ephem_sun.compute(d)
ephem_moon.compute(d)
transs = '--:--'
antim = '--:--'
transm = '--:--'
next_s_tr = obs.next_transit(ephem_sun, start=d)
if next_s_tr - obs.date < 1:
transs = hhmm(next_s_tr)
next_m_atr = obs.next_antitransit(ephem_moon, start=d)
if next_m_atr - obs.date < 1:
antim = hhmm(next_m_atr)
next_m_tr = obs.next_transit(ephem_moon, start=d)
if next_m_tr - obs.date < 1:
transm = hhmm(next_m_tr)
#-----------------------------
obs = ephem.Observer()
obs.date = date
ephem_moon.compute(date + 0.5)
pct = int(round(ephem_moon.phase)) # percent of moon surface illuminated
age = int(round((date + 0.5) - ephem.previous_new_moon(date + 0.5)))
phase = ephem_moon.elong.norm + 0.0 # moon phase as float (0:new to π:full to 2π:new)
ephem_sun.compute(date - 0.1)
obs.date = date - 0.1
# round to the second; convert back to days
x = round(
(obs.next_antitransit(ephem_sun) - date) * 86400) * 2 * math.pi / 86400
eqt00 = ephem.hours(x)
eqt00 = str(eqt00)[-8:-3]
if x >= 0:
eqt00 = r"\colorbox{{lightgray!80}}{{{}}}".format(eqt00)
y = round((obs.next_transit(ephem_sun) -
(date + 0.5)) * 86400) * 2 * math.pi / 86400
eqt12 = ephem.hours(y)
eqt12 = str(eqt12)[-8:-3]
if y >= 0:
eqt12 = r"\colorbox{{lightgray!80}}{{{}}}".format(eqt12)
return eqt00, eqt12, transs, transm, antim, age, pct
def fit_dec(data, start, end, debug=False):
lst = np.load("data/report/3C144_03-28-2014_001926.npz")["lst"][start:end]
data = data[(len(data) - len(lst)) / 2 : -(len(data) - len(lst)) / 2]
generate_plot(data, dft=True)
source = ephem.FixedBody()
obs = ephem.Observer()
obs.lat = ephem.degrees(37.8732)
obs.long = ephem.degrees(-122.2573)
obs.date = ephem.date("2014/3/28 0:19:26")
source._ra = ephem.hours("5:34:31.95")
source._dec = ephem.degrees("22:00:51.1")
source._epoch = ephem.J2000
source.compute(obs)
hs = np.array(ephem.hours(source.ra) - lst)
# 'Brute force' least squares
lmbda = 2.5 # Wavelength lambda in cm
YBAR = []
By = 1000
cos_dec = np.linspace(0.01, 1, 500)
A = []
S_SQ = []
# Iterate over baseline lengths in cm
for dec in cos_dec:
C = 2 * np.pi * By / lmbda * dec
x1 = np.cos(C * np.sin(hs))
x2 = np.sin(C * np.sin(hs))
X = np.matrix([x1, x2])
ybar, a, s_sq = least_squares(data, X)
S_SQ.append(s_sq)
ybar = np.array(ybar[:, 0])
YBAR.append(ybar)
A.append(a)
Dopt = np.argmin(S_SQ)
if debug:
plt.figure()
plt.plot(cos_dec, S_SQ / max(S_SQ))
plt.title("Normalized Residuals for Declination Fit")
plt.savefig("img/crab/residual_dec.png")
plt.figure()
plt.plot(data)
plt.plot(YBAR[Dopt])
plt.title("Least Squares Fit for Declination")
plt.legend(["Filtered", "Fit"])
plt.savefig("img/crab/fit_dec.png")
print "By = " + str(By)
print "delta (deg)= " + str(np.arccos(cos_dec[Dopt]) * 180 / np.pi)
print "A = " + str(A[Dopt])
return YBAR[Dopt], A[Dopt], np.arccos(cos_dec[Dopt]) * 180 / np.pi
def solartime(time, lon_loc_rad, sun=ephem.Sun()):
"""Return sine and cosine value of solar hour angle depending on longitude and time of TRT cell at t0"""
obs = ephem.Observer()
obs.date = time
obs.lon = lon_loc_rad
sun.compute(obs)
## sidereal time == ra (right ascension) is the highest point (noon)
angle_rad = ephem.hours(obs.sidereal_time() - sun.ra +
ephem.hours('12:00')).norm
return np.sin(angle_rad), np.cos(angle_rad)
def test_track_map(fname="molonglo_fb_map.fits"):
ra,dec = "07:16:35","-19:00:40"
eq = e.Equatorial(ra,dec)
ra = eq.ra
dec = eq.dec
lst = float(e.hours("03:56"))
dlst = float(e.hours("00:00:20.0016"))*SEC_TO_SID
data = read(fname)
lsts = np.arange(data.shape[1])*dlst + lst
return TrackedFanBeamTimeMap(data,ra,dec,lsts)
def possibleExposures(orbit, year='Y4'):
'''
Returns a list of exposures near the target orbit in a given year. Assumes the object moves slowly enough that
it won't wander more than 10 degrees from its location on 2014/01/01. Returns a preliminary exposure
list from which we do a more careful search.
:param orbit: orbit from pyOrbfit
:param year: DES observing year to search, e.g. 'Y4'
:return: dataframe of exposures to be searched.
'''
pos_ref = orbit.predict_pos(ephem.date('2014/01/01'))
ra_ref, dec_ref = pos_ref['ra'], pos_ref['dec']
assert year in ['all', 'SV', 'Y1', 'Y2', 'Y3', 'Y4', 'Y5']
if year == 'all':
search_exps = all_exps
elif year == 'SV':
search_exps = all_exps.loc[
all_exps.apply(lambda row: 20121102 < row['nite'] < 20130220 and row['band'] != 'Y', axis=1)]
elif year == 'Y1':
search_exps = all_exps.loc[
all_exps.apply(lambda row: 20130810 < row['nite'] < 20140220 and row['band'] != 'Y', axis=1)]
elif year == 'Y2':
search_exps = all_exps.loc[
all_exps.apply(lambda row: 20140810 < row['nite'] < 20150220 and row['band'] != 'Y', axis=1)]
elif year == 'Y3':
search_exps = all_exps.loc[
all_exps.apply(lambda row: 20150810 < row['nite'] < 20160220 and row['band'] != 'Y', axis=1)]
elif year == 'Y4':
search_exps = all_exps.loc[
all_exps.apply(lambda row: 20160810 < row['nite'] < 20170220 and row['band'] != 'Y', axis=1)]
elif year == 'Y5':
search_exps = all_exps.loc[
all_exps.apply(lambda row: 20170810 < row['nite'] < 20180220 and row['band'] != 'Y', axis=1)]
else:
print 'Oops'
search_exps = None
try:
near_exps = search_exps.loc[search_exps.apply(lambda row:
ephem.separation(
(ephem.hours(row['ra']), ephem.degrees(row['dec'])),
(ra_ref, dec_ref)) < ephem.degrees('10:00:00'), axis=1)]
except:
near_exps = None
in_exposures = []
in_ccd = []
if near_exps is not None:
for ind, row in near_exps.iterrows():
pos = orbit.predict_pos(row['date'])
ra, dec = ephem.hours(pos['ra']), ephem.degrees(pos['dec'])
ccdname, ccdnum = compute_chip(ra, dec, row['ra'], row['dec'])
if ccdnum > -99 and ccdnum not in [2, 31, 61]:
in_exposures.append(row['expnum'])
in_ccd.append(ccdnum)
near_exps = near_exps.loc[near_exps['expnum'].isin(in_exposures)]
near_exps['ccd'] = pd.Series(in_ccd, index=near_exps.index)
return near_exps
def __init__(self, name, port, parent_host, parent_port):
super(telescope, self).__init__(name, 'telescope', port, parent_host, parent_port)
CMDs={
chr(6):self.cmd_ack, \
":info": self.cmd_info, \
":FirmWareDate": self.cmd_firware_date, \
":GVF": self.cmd_firware_ver, \
":V": self.cmd_firware_ver, \
":GVD": self.cmd_firware_date, \
":GC": self.cmd_getLocalDate, \
":GL": self.cmd_getLocalTime, \
":GS": self.cmd_getSideralTime, \
":Sr": self.cmd_setTargetRA, \
":Sd": self.cmd_setTargetDEC, \
":MS": self.cmd_slew, \
":Q": self.cmd_stopSlew, \
":Gr": self.cmd_getTargetRA, \
":Gd": self.cmd_getTargetDEC, \
":GR": self.cmd_getTelescopeRA, \
":GD": self.cmd_getTelescopeDEC, \
":RS": self.cmd_setMaxSlewRate, \
":RM": self.cmd_slewRate, \
":Me": self.cmd_pulseE, \
":Mw": self.cmd_pulseW, \
":Mn": self.cmd_pulseN, \
":Ms": self.cmd_pulseS, \
":CM": self.cmd_align2target, \
"@getObserver": self.getObserver, \
"@getGear": self.getGear, \
"@getRA": self.getRA, \
"@getDEC": self.getDEC, \
"@setTrackSpeed": self.setTrackSpeed, \
"@values": self.values
}
self.m = ramps.mount()
self.valuesmsg = {}
self.addCMDs(CMDs)
self.observerInit()
self.targetRA = ephem.hours(0)
self.targetDEC = ephem.degrees(0)
ra = ephem.hours(self.observer.sidereal_time())
dec = ephem.degrees(0)
star = ephem.FixedBody(ra, dec, observer=self.observer, epoch='2016.4')
star.compute(self.observer)
self.RA = star.ra
self.DEC = star.dec
self.alt = star.alt
self.az = star.az
self.pulseStep = ephem.degrees('00:00:01')
a = ephem.degrees('00:20:00')
vRA = -ephem.hours("00:00:01")
vDEC = ephem.degrees("00:00:00")
self.m.trackSpeed(vRA, vDEC)
def loadStackData(self):
self.d2r = np.pi/180.0
self.r2d = 180.0/np.pi
self.stackFile = tables.openFile(self.loadStackName, mode='r')
self.header = self.stackFile.root.header.header
self.headerTitles = self.header.colnames
self.headerInfo = self.header[0]
self.stackNode = self.stackFile.root.stack
self.stackData = np.array(self.stackNode.stack.read())
self.jdData = np.array(self.stackNode.time.read()[0])
self.nRow = self.stackData.shape[0]
self.nCol = self.stackData.shape[1]
self.totalFrames = self.stackData.shape[2]
# Load data out of display stack h5 file
self.centroid_RA = self.headerInfo[self.headerTitles.index('RA')]
self.centroid_DEC = self.headerInfo[self.headerTitles.index('Dec')]
self.original_lst = self.headerInfo[self.headerTitles.index('lst')]
self.exptime = self.headerInfo[self.headerTitles.index('exptime')]
self.integrationTime = self.headerInfo[self.headerTitles.index('integrationTime')]
self.deadPixelFilename = self.headerInfo[self.headerTitles.index('deadPixFileName')]
self.HA_offset = self.headerInfo[self.headerTitles.index('HA_offset')]
self.nRow = self.headerInfo[self.headerTitles.index('nRow')]
self.nCol = self.headerInfo[self.headerTitles.index('nCol')]
self.centroid_RA_radians = ephem.hours(self.centroid_RA).real
#self.centroid_RA_arcsec = self.radians_to_arcsec(self.centroid_RA_radians)/15.0
self.centroid_RA_arcsec = self.radians_to_arcsec(self.centroid_RA_radians)
self.centroid_DEC_radians = ephem.degrees(self.centroid_DEC).real
self.centroid_DEC_arcsec = self.radians_to_arcsec(self.centroid_DEC_radians)
self.original_lst_radians = ephem.hours(self.original_lst).real
self.original_lst_seconds = self.radians_to_arcsec(self.original_lst_radians)/15.0
#self.original_lst_seconds = self.radians_to_arcsec(self.original_lst_radians)
self.HA_offset_radians = self.HA_offset*self.d2r
self.ui.maxLabel.setText('/ ' + str(self.totalFrames-1))
self.centerPositions = np.zeros((self.totalFrames,2))
self.apertureRadii = np.zeros(self.totalFrames)
self.annulusRadii = np.zeros((self.totalFrames,2))
for iFrame in range(self.totalFrames):
self.centerPositions[iFrame] = [float(self.nCol)/2.0 - 0.5, float(self.nRow)/2.0 - 0.5]
self.apertureRadii[iFrame] = 5.0
self.annulusRadii[iFrame] = [10.0, 20.0]
self.updateFrameInfo()
def solartime(observer, sun=ephem.Sun()):
"""
"""
# Astronomical math
import ephem
# Credit: J.F. Sebastian
# http://stackoverflow.com/questions/13314626/local-solar-time-function-from-utc-and-longitude
sun.compute(observer)
# sidereal time == ra (right ascension) is the highest point (noon)
hour_angle = observer.sidereal_time() - sun.ra
return ephem.hours(hour_angle + ephem.hours('12:00')).norm # norm for 24h
def source_pick(self, *args):
"""
Right click- gets Info of the source
Left click- selects source
scroll- finds nearest source
"""
self.logger.debug("source_pick: called with %s", args)
event1 = args[0]
# Merge dictinaries for whatever sources ticked in the GUI
thisline = None
thisline = event1.artist
# thisline.update
# if thisline is not None and not hasattr(event1, 'already_picked'):
self.logger.debug("source_pick: this line: %s", thisline)
#When Plotting in Az-El
self.source_pick_az = thisline.get_xdata()[0]
self.source_pick_alt = thisline.get_ydata()[0]
self.logger.debug("source_pick: az/el = %s/%s", self.source_pick_az,
self.source_pick_alt)
#n = 0
#m = 0
for key, value in list(self.source_dict.items()):
self.logger.debug("source_pick: matching az %s",
self.source_pick_az)
self.logger.debug("source_pick: ... az %s",
repr(ephem.hours(value[2]) * rad2deg))
if round(numpy.float64(self.source_pick_az), 6) == \
round(numpy.float64(repr(ephem.hours(value[2])*rad2deg)), 6):
self.logger.debug("source_pick: match found for object %s",
key)
self.source_name = key
self.source_info_ra = value[0]
self.source_info_dec = value[1]
self.source_info_az = value[2]
self.source_info_alt = value[3]
self.source_info_flux = value[4]
self.source_info_vsys = value[5]
else:
pass
#n = n +1
#m = m+1
self.annotation = self.ui.skymap_axes.annotate(
self.source_name,
xy=((self.source_pick_az), (self.source_pick_alt)),
xytext=(-20, 20),
textcoords='offset points',
ha='right',
va='bottom',
bbox=dict(boxstyle='round,pad=0.5', fc='yellow', alpha=0.5),
arrowprops=dict(arrowstyle='->', connectionstyle='arc3,rad=0'))
# by default, disable the annotation visibility
self.annotation.set_visible(True)
self.ui.skymap_canvas.draw()
self.annotation.set_visible(False)
def calib_numogate_ridge_observatory_total_power(data):
me = ephem.Observer()
#
# PyEphem wants lat/long as strings, rather than floats--took me quite
# a long time to figure that out. If they don't arrive as strings,
# the calculations for sidereal time are complete garbage
#
me.long = globals()["calib_long"]
me.lat = globals()["calib_lat"]
me.date = ephem.now()
sidtime = me.sidereal_time()
foo = time.localtime()
if not "calib_prefix" in globals():
pfx = "./"
else:
pfx = globals()["calib_prefix"]
filenamestr = "%s/%04d%02d%02d%02d" % (pfx, foo.tm_year, foo.tm_mon,
foo.tm_mday, foo.tm_hour)
numogate_file = open(filenamestr + ".tpdat", "a")
r = (data / 409.6)
flt = "%6.3f" % r
#r = calib_default_total_power(data)
inter = globals()["calib_decln"]
integ = globals()["calib_integ_setting"]
fc = globals()["calib_freq_setting"]
fc = fc / 1000000
bw = globals()["calib_bw_setting"]
bw = bw / 1000000
ga = globals()["calib_gain_setting"]
now = time.time()
if not "calib_then_tpdat" in globals():
globals()["calib_then_tpdat"] = now
if (now - globals()["calib_then_tpdat"]) >= 20:
globals()["calib_then_tpdat"] = now
numogate_file.write(
str(ephem.hours(sidtime)) + " " + flt + " Dn=" + str(inter) + ",")
numogate_file.write("Ti=" + str(integ) + ",Fc=" + str(fc) + ",Bw=" +
str(bw))
numogate_file.write(",Ga=" + str(ga) + "\n")
else:
numogate_file.write(str(ephem.hours(sidtime)) + " " + flt + "\n")
numogate_file.close()
return (r)
def getRA(self,arg):
self.observer.date=ephem.Date(datetime.datetime.utcnow())
self.sideral=self.observer.sidereal_time()
beta=float(self.m.axis1.motorBeta)*self.m.axis1.minMotorStep
#beta=self.m.axis1.beta
#print self.m.axis1.beta-beta
ra=ephem.hours(self.sideral+beta).norm
if ra==ephem.hours("24:00:00"):
ra=ephem.hours("00:00:00")
self.RA=ra
return self.RA
def get_solartime(mjd, longitude):
'''calculate solar time'''
sun = ephem.Sun()
observer = ephem.Observer()
observer.date = mjd2datetime(mjd)
observer.long = longitude * np.pi / 180.0
sun.compute(observer)
hour_angle = observer.sidereal_time() - sun.ra
lst = str(ephem.hours(hour_angle + ephem.hours('12:00')).norm)
return (float(lst.split(':')[0]) +
float(lst.split(':')[1]) / 60.0 +
float(lst.split(':')[2]) / 3600.0)
def _ephem_risetime_(self, ephem_target, lst=True):
try:
rise_time = self.observer.next_rising(ephem_target)
except ephem.AlwaysUpError:
return ephem.hours('0:0:01.0')
except AttributeError:
return ephem.hours('0:0:01.0')
if not lst:
return rise_time
self.observer.date = rise_time
return self.observer.sidereal_time()
def calib_numogate_ridge_observatory_total_power(data):
me = ephem.Observer()
#
# PyEphem wants lat/long as strings, rather than floats--took me quite
# a long time to figure that out. If they don't arrive as strings,
# the calculations for sidereal time are complete garbage
#
me.long = globals()["calib_long"]
me.lat = globals()["calib_lat"]
me.date = ephem.now()
sidtime = me.sidereal_time()
foo = time.localtime()
if not "calib_prefix" in globals():
pfx = "./"
else:
pfx = globals()["calib_prefix"]
filenamestr = "%s/%04d%02d%02d%02d" % (pfx, foo.tm_year,
foo.tm_mon, foo.tm_mday, foo.tm_hour)
numogate_file = open (filenamestr+".tpdat","a")
r = (data / 409.6)
flt = "%6.3f" % r
#r = calib_default_total_power(data)
inter = globals()["calib_decln"]
integ = globals()["calib_integ_setting"]
fc = globals()["calib_freq_setting"]
fc = fc / 1000000
bw = globals()["calib_bw_setting"]
bw = bw / 1000000
ga = globals()["calib_gain_setting"]
now = time.time()
if not "calib_then_tpdat" in globals():
globals()["calib_then_tpdat"] = now
if (now - globals()["calib_then_tpdat"]) >= 20:
globals()["calib_then_tpdat"] = now
numogate_file.write(str(ephem.hours(sidtime))+" "+flt+" Dn="+str(inter)+",")
numogate_file.write("Ti="+str(integ)+",Fc="+str(fc)+",Bw="+str(bw))
numogate_file.write(",Ga="+str(ga)+"\n")
else:
numogate_file.write(str(ephem.hours(sidtime))+" "+flt+"\n")
numogate_file.close()
return(r)
def read_ephemeris(ephemeris, date):
# TODO: is the ephemeris file fixed in col positions?
"""
:param ephemeris:
:param date:
:return:
"""
in_data = False
now = date
month_ints = {
'Jan': 1, 'Feb': 2, 'Mar': 3, 'Apr': 4, 'May': 5, 'Jun': 6,
'Jul': 7, 'Aug': 8, 'Sep': 9, 'Oct': 10, 'Nov': 11, 'Dec': 12}
found = False
for line in ephemeris.split('\n'):
if line.startswith('$$SOE'):
in_data = True
c1 = 0
elif line.startswith('$$EOE') or line.startswith(' $$EOE'):
if not found:
ra = ephem.hours('00:00:00')
dec = ephem.degrees('00:00:00')
ephe = False
return ra, dec, ephe
elif in_data:
datestr = line[1:6] + str(month_ints[line[6:9]]) + line[9:18]
date = datetime.strptime(datestr, '%Y-%m-%d %H:%M')
if now.datetime() > date:
data = line
found = False
# noinspection PyUnboundLocalVariable
c1 += 1
else:
# noinspection PyUnboundLocalVariable
if c1 == 0:
ra = ephem.hours('00:00:00')
dec = ephem.degrees('00:00:00')
ephe = False
return ra, dec, ephe
# noinspection PyUnboundLocalVariable
ra_temp = data[23:36].strip()
dec_temp = data[37:50].strip()
if len(ra_temp.split()) > 3:
ra_temp = data[23:34].strip()
dec_temp = data[35:46].strip()
ra = ephem.hours(ra_temp.replace(' ', ':'))
dec = ephem.degrees(dec_temp.replace(' ', ':'))
ephe = True
print(ra, dec, ephe, now)
return pd.np.degrees(ra), pd.np.degrees(dec), ephe
def dLocation(self):
s = ephem.Sun()
s.compute(epoch=ephem.now())
print("R.A.: %s DEC.: %s" % (s.a_ra, s.a_dec))
o = ephem.Observer()
o.lon, o.lat = '17.03333', '51.100000' # Współrzędne Wrocławia
o.date = ephem.now() # 00:22:07 EDT 06:22:07 UT+1
s.compute(o)
hour_angle = o.sidereal_time() - s.ra
t = ephem.hours(hour_angle +
ephem.hours('12:00')).norm # .norm for 0..24
rad = str(ephem.hours(hour_angle + ephem.hours('12:00')).norm)
print("HOUR ANGLE: %s SIDERAL TIME: %s" % (rad, o.sidereal_time()))
def _ephem_settime_(self, ephem_target, lst=True):
try:
rise_time = self.observer.next_rising(ephem_target)
set_time = self.observer.next_setting(ephem_target,
start=rise_time)
except ephem.AlwaysUpError:
return ephem.hours('23:59:59.0')
except AttributeError:
return ephem.hours('23:59:59.0')
if not lst:
return set_time
self.observer.date = set_time
return self.observer.sidereal_time()
def confirm_align(star):
result = tkMessageBox.askyesno("Align Telescope", "Are you sure?")
if result is True:
# Check if encoders are available
try:
ra = enc.Enc('RAEncoder')
dec = enc.Enc('DECEncoder')
except:
log_action('ALIGN', 'Scope', 'Encoder(s) not found')
else:
# Initialize encoders
ra = enc.Enc('RAEncoder')
success = ra.connect()
if not success:
log_action('Connect', 'Encoder',
'RAEncoder failed to initialize')
dec = enc.Enc('DECEncoder')
success = dec.connect()
if not success:
log_action('Connect', 'Encoder',
'DECEncoder failed to initialize')
# Look up the star
try:
ephem.star(star) # Check if 'name' is a named star
except KeyError:
obj = read_db(
star
) # If not, read 'name' from the custom objects database (Weird to do but w/e)
else:
obj = ephem.star(star) # But if it was a star...
obj.compute(rho)
# Create Scope object
scope = sc.Scope(obj, ra, dec)
position = scope.where() # Grab scope position to confirm align
st = rho.sidereal_time() # Grab RHO sidereal time
ha = '%s' % ephem.hours(
st - ephem.hours(position[0])) # Calc HA of object from RHO
s_ha.set(ha)
s_dec.set(str(position[1]))
s_tick_ha.set(scope.data['Ticks'][-1][0])
s_tick_dec.set(scope.data['Ticks'][-1][1])
log_action('Align Success', obj.name,
str('HA: ' + position[0] + ' | DEC: ' + position[1]))
s_ready.set('Telescope Aligned')
s_scope.config(fg='black')
else:
# Do nothing
return
def gcDAR():
iraf.noao()
obs = iraf.noao.observatory
# Set up Keck observatory info
obs(command="set", obsid="keck")
keck = ephem.Observer()
keck.long = math.radians(-obs.longitude)
keck.lat = math.radians(obs.latitude)
keck.elev = obs.altitude
keck.pressure = 800.0
keck.temp = 278.0
# Date of Observations: 06maylgs1
keck.date = '2006/05/03 %d:%d:%f' % (obs.timezone+3, 28, 46.33)
# Set up the galactic center target
sgra = ephem.FixedBody()
sgra._ra = ephem.hours("17:45:40")
sgra._dec = ephem.degrees("-29:00:10")
sgra._epoch = 2000
sgra.compute()
pos2 = ephem.FixedBody()
pos2._ra = ephem.hours("17:45:40")
pos2._dec = ephem.degrees("-29:00:00")
pos2._epoch = 2000
pos2.compute()
print 'Date of Obs: ', keck.date
sgra.compute(keck)
pos2.compute(keck)
print 'Azimuth of Objects: %s vs. %s' % (sgra.az, pos2.az)
for ii in range(15):
keck.lat = math.radians(obs.latitude - (ii*2))
sgra.compute(keck)
pos2.compute(keck)
angAbs = ephem.separation((sgra.ra, sgra.dec), (pos2.ra, pos2.dec))
angAbs *= 206265.0
angRel = ephem.separation((sgra.az, sgra.alt), (pos2.az, pos2.alt))
angRel *= 206265.0
angDiff = angAbs - angRel
print 'Sgr A*: %s vs. %s deltaR = %5d (muas)' % \
(sgra.alt, pos2.alt, angDiff*1e6)
def gcDAR():
iraf.noao()
obs = iraf.noao.observatory
# Set up Keck observatory info
obs(command="set", obsid="keck")
keck = ephem.Observer()
keck.long = math.radians(-obs.longitude)
keck.lat = math.radians(obs.latitude)
keck.elev = obs.altitude
keck.pressure = 800.0
keck.temp = 278.0
# Date of Observations: 06maylgs1
keck.date = '2006/05/03 %d:%d:%f' % (obs.timezone + 3, 28, 46.33)
# Set up the galactic center target
sgra = ephem.FixedBody()
sgra._ra = ephem.hours("17:45:40")
sgra._dec = ephem.degrees("-29:00:10")
sgra._epoch = 2000
sgra.compute()
pos2 = ephem.FixedBody()
pos2._ra = ephem.hours("17:45:40")
pos2._dec = ephem.degrees("-29:00:00")
pos2._epoch = 2000
pos2.compute()
print 'Date of Obs: ', keck.date
sgra.compute(keck)
pos2.compute(keck)
print 'Azimuth of Objects: %s vs. %s' % (sgra.az, pos2.az)
for ii in range(15):
keck.lat = math.radians(obs.latitude - (ii * 2))
sgra.compute(keck)
pos2.compute(keck)
angAbs = ephem.separation((sgra.ra, sgra.dec), (pos2.ra, pos2.dec))
angAbs *= 206265.0
angRel = ephem.separation((sgra.az, sgra.alt), (pos2.az, pos2.alt))
angRel *= 206265.0
angDiff = angAbs - angRel
print 'Sgr A*: %s vs. %s deltaR = %5d (muas)' % \
(sgra.alt, pos2.alt, angDiff*1e6)
def solarTime(utc_dt, lat, lon):
"""Compute local solar time for given (lat, lon)
"""
import ephem
o = ephem.Observer()
o.date = utc_dt
o.lat = str(lat)
o.lon = str(lon)
sun = ephem.Sun()
sun.compute(o)
hour_angle = o.sidereal_time() - sun.ra
rad = str(ephem.hours(hour_angle + ephem.hours('12:00')).norm)
t = datetime.strptime(rad, '%H:%M:%S.%f')
solar_dt = datetime.combine(utc_dt.date(), t.time())
return solar_dt
def central_radec(self, blockID): junk, fieldIds = self.fields_in_block(blockID) ras = [] decs = [] for field in fieldIds: ras.append(ephem.hours(self.bk.field_ra(field))) # str in hours of RA decs.append(ephem.degrees(self.bk.field_dec(field))) # str in deg of Dec # mean ra, mean dec: APPROXIMATING ra = ephem.hours((sum(ras)/len(ras))) dec = ephem.degrees((sum(decs)/len(decs))) retval = (str(ra), str(dec)) return retval
def ephem_string(self):
string = []
string.append(self.name)
try:
string.append("f|" + sac_to_ephem_dict[self.body_type])
except KeyError:
string.append("f|T")
string.append(str(ephem.hours(self.ra)))
string.append(str(ephem.degrees(self.dec)))
string.append(str(self.mag))
string.append("2000")
max_s = self.size_max
if len(max_s) == 0:
fp = 0
elif max_s[-1] == 'm': #arcmin
fp = float(max_s[:-1]) / 3437.74677078
elif max_s[-1] == 's': #arcsec
fp = float(max_s[:-1]) / 206264.806247
elif max_s[-1] == 'd': #degree
fp = float(max_s[:-1]) / 57.2957795131
else:
raise ValueError("Unkwnown format for size_max: " + max_s)
string.append(str(fp * 206264.806247))
return ','.join(string)
def mpcOutput(self,data):
#TODO adapt data prior to invoke.
import ephem
out=''
for d in data:
fecha=d['DATETIME'][0:10].replace('-',' ')
hh=float(d['DATETIME'][11:13])
mm=float(d['DATETIME'][14:16])
ss=float(d['DATETIME'][17:19])
#print d['KEY'],fecha,hh,mm,ss,ephem.hours(ephem.degrees(str(d['RA']))),ephem.degrees(str(d['DEC']))
hhdec=round((hh*3600.+mm*60.+ss)/(24*3600)*100000,0)
fecha=fecha+'.'+"%05.0f" % (hhdec)+" "
id=d['KEY']
ra_hh,ra_mm,ra_ss=("%11s" % ephem.hours(ephem.degrees(str(d['RA'])))).split(':')
#print ra_hh,ra_mm,ra_ss
ra="%02d %02d %04.1f" % (float(ra_hh),float(ra_mm),float(ra_ss))
dec_dd,dec_mm,dec_ss=("%11s" % ephem.degrees(str(d['DEC']))).split(':')
#print dec_dd,dec_mm,dec_ss
dec="%+03d %02d %05.2f" % (float(dec_dd),float(dec_mm),float(dec_ss))
#print ra,"/",dec
#rastr="%11s" % (ephem.degrees(str(d['DEC'])))
#decstr="%11s" % (ephem.degrees(str(d['DEC'])))
#ra=rastr.replace(':',' ')
#dec=decstr.replace(':',' ')
#id=d['INT_NUMBER'][-7:]
#[MPnumber,Provisional,Discovery,Note1,Note2,Date,RA,DEC,Mag,Band,Observatory]
# 492A002 C2014 09 03.13366 03 57 53.26 +05 44 22.9 18.6 V J75
# K07VF3N C2014 09 14.83670 0 53 58.89 0 07 53.1 20.2 V J75
obs=('',id,'','','C',fecha,ra,dec,d['MAG'],'V','J75')
out+='%5s%7s%1s%1s%1s%16s%-12s%-12s %5.1f %1s %3s\n' % obs
return out
def residuals(self, obsdf, date_col='date', ra_col='ra', dec_col='dec'):
'''
Returns the residuals (in arcseconds) for the observations in obscat as a numpy array. Ordering is same as time-order of the observations,
from earliest to latest.
obsdf is a pandas dataframe containing the observations.
date, ra, dec are in the column names specified.
date is an ephem.date object
ra, dec are ephem.Angle objects (typically hours, degrees)
'''
resids = []
obsdf.sort_values('expnum', ascending=True, inplace=True)
for ind, obs in obsdf.iterrows():
if obs[date_col][0] != '#':
pos_pred = self.predict_pos(
ephem.date(obs[date_col]) + 0.53 * ephem.second +
float(obs['exptime']) * ephem.second / 2)
ra_pred, dec_pred = pos_pred['ra'], pos_pred['dec']
sep = ephem.separation(
(ephem.hours(obs[ra_col]), ephem.degrees(obs[dec_col])),
(ra_pred, dec_pred))
resid = sep * (180 / np.pi) * 3600 # convert to arcseconds
resids.append(resid)
# print obs['expnum'], resid
return np.array(resids)
def compare_sun_altaz(obs, pressure = 1010):
"""Compare homebrewed and PyEphem calculations of sun alt-az
Prints out results of:
my method using RA/dec values from Karto's method and PyEphem
PyEphem's computation of alt/az
It appears that the refraction correction gives the biggest discrepancy.
Without refraction (pressure = 0), the computations agree to within
10-20 arcsec or so.
"""
eph_sun = ephem.Sun()
obs.date = ephem.now()
if pressure != 1010:
obs.pressure = pressure
eph_sun.compute(obs)
if pressure != 1010:
obs.pressure = 1010
ral_sun = ral.sunPos()
sun_ra = ephem.hours(hrs2rad( ral_sun[0] ))
sun_dec = ephem.degrees(deg2rad( ral_sun[1] ))
print 'Sun alt-az, my matrix + kartp\'s ra, dec: (%s, %s)' % \
radec2altaz(obs, sun_ra, sun_dec)
print 'Sun alt-az, my matrix + PyEphem ra, dec: (%s, %s)' % \
radec2altaz(obs, eph_sun.ra, eph_sun.dec)
print 'Sun alt-az, PyEphem + PyEphem alt, az: (%s, %s)' % \
(eph_sun.alt, eph_sun.az)
def build_ossos_footprint(ax, blocks, field_offset):
# build the pointings that will be used for the discovery fields
x = []
y = []
names = []
coverage = []
year = '2013'
if year == 'astr':
field_offset = field_offset*0.75
for block in blocks.keys():
sign = -1
if 'f' in block: # unsure what this was ever meant to do
sign=1
rac = ephem.hours(blocks[block]["RA"])+years[year]["ra_off"]
decc = ephem.degrees(blocks[block]["DEC"])+sign*years[year]["dec_off"]
width = field_offset/math.cos(decc)
block_centre.from_radec(rac,decc)
block_centre.set(block_centre.lon + xgrid[year][0]*width,block_centre.lat)
field_centre.set(block_centre.lon, block_centre.lat)
for dx in xgrid[year]:
(rac, decc) = field_centre.to_radec()
for dy in ygrid[year]:
ddec = dy*field_offset
dec = math.degrees(decc + ddec)
ra = math.degrees(rac)
names.append("%s%+d%+d" % ( block, dx, dy))
y.append(dec)
x.append(ra)
xcen = ra
ycen = dec
dimen = camera_dimen
coverage.append(Polygon.Polygon((
(xcen-dimen/2.0,ycen-dimen/2.0),
(xcen-dimen/2.0,ycen+dimen/2.0),
(xcen+dimen/2.0,ycen+dimen/2.0),
(xcen+dimen/2.0,ycen-dimen/2.0),
(xcen-dimen/2.0,ycen-dimen/2.0))))
ax.add_artist(Rectangle(xy=(ra-dimen/2.0,dec-dimen/2.0),
height=camera_dimen,
width=camera_dimen,
edgecolor='b',
lw=0.5, fill=True, alpha=0.3))
rac += field_offset / math.cos(decc)
for i in range(3):
field_centre.from_radec(rac,decc)
field_centre.set(field_centre.lon, block_centre.lat)
(ttt, decc) = field_centre.to_radec()
if year == "astr":
sys.exit(0)
ras = np.radians(x)
decs = np.radians(y)
return ras, decs, coverage, names, ax
def __init__(self, unit, locA, locB):
if len(locA) != 3 or len(locB) != 3:
print("Bad Locations given")
return
self.telescope = ep.Observer()
self.telescope.lat = self.TELESCOPE_LATITUDE
self.telescope.lon = self.TELESCOPE_LONGITUDE
# Neglect the atmosphere b/c we're using radio waves
self.telescope.pressure = 0
# Approximate Elevation
self.telescope.elevation = 30
self.location = None
if unit == sky_point.RADC:
line = "thing,f," + self.loc2str(locA) + "," + self.loc2str(locB) + ",1"
self.location = ep.readdb(line)
elif unit == sky_point.GALACTIC:
ga = ep.Galactic(self.loc2str(locA), self.loc2str(locB), epoch=ep.J2000)
eq = ep.Equatorial(ga)
line = "thing,f," + str(eq.ra) + "," + str(eq.dec) + ",1"
self.location = ep.readdb(line)
elif unit == sky_point.AZEL:
ra, dec = self.telescope.radec_of(self.loc2str(locA), self.loc2str(locB))
line = "thing,f," + str(ra) + "," + str(dec) + ",1"
self.location = ep.readdb(line)
elif unit == sky_point.HADC:
ra = ep.hours(self.telescope.sidereal_time() - ep.degrees(self.loc2str(locA)))
line = "thing,f," + str(ra) + "," + self.loc2str(locB) + ",1"
self.location = ep.readdb(line)
else:
print("Error, Unknown Units")
return
self.location.compute(self.telescope)
def clusterSample():
clusters = [
{"name": "M17", "distance": 2, "ra": "18:20:26", "dec": "-17:10:01"},
{"name": "Wd2", "distance": 5, "ra": "10:23:58", "dec": "-57:45:49"},
{"name": "Wd1", "distance": 5, "ra": "16:47:04", "dec": "-45:51:05"},
{"name": "RSGC1", "distance": 6, "ra": "18:37:58", "dec": "-06:52:53"},
{"name": "RSGC2", "distance": 6, "ra": "18:39:20", "dec": "-06:05:10"},
]
py.close(1)
py.figure(1, linewidth=2, figsize=(16, 10))
py.subplots_adjust(left=0.05, right=0.97, bottom=0.1, top=0.95, wspace=0.2, hspace=0.25)
for ii in range(len(clusters)):
clust = clusters[ii]
obj = ephem.FixedBody()
obj._ra = ephem.hours(clust["ra"])
obj._dec = ephem.degrees(clust["dec"])
obj._epoch = 2000
obj.compute()
gal = ephem.Galactic(obj)
longitude = math.degrees(float(gal.lon))
print ""
print "%-10s %s %s l = %.1f" % (clust["name"], clust["ra"], clust["dec"], longitude)
py.subplot(2, 3, ii + 1)
properMotions(longitude, clust["distance"], clust["name"])
def time2angle(venue):
'''
Cygnus A RA: 19h 59m 28.3566s
Cygnus A Dec: +40 deg 44' 02.096"
At Carl's using http://www.latlong.net/convert-address-to-lat-long.html
37.980012 deg lat
-122.185800 deg long
venue format is tuple
'''
HERA = ep.Observer()
HERA.long = ep.degrees('-122.185800')
HERA.lat = ep.degrees('37.980012')
HERA.date = venue
HERA.epoch = ep.date(venue)
sidereal_time = HERA.sidereal_time()
#print ('Sidereal time: %s') %str(sidereal_time)
astro_obj = ep.FixedBody()
astro_obj._ra = ep.hours('19:59:28.3566')
astro_obj._dec = ep.degrees('40:44:02.096')
astro_obj.compute(HERA)
coordinates_given_time = (ep.degrees(astro_obj.az), ep.degrees(astro_obj.alt))
transit_time = ep.localtime(astro_obj.transit_time)
transit_alt = ep.degrees(astro_obj.transit_alt)
rise_time_on_given_date = ep.localtime(astro_obj.rise_time)
rise_az_on_given_date = ep.degrees(astro_obj.rise_az)
set_time_on_given_date = ep.localtime(astro_obj.set_time)
set_az_on_given_date = ep.degrees(astro_obj.set_az)
return coordinates_given_time, transit_time, \
transit_alt, rise_time_on_given_date, rise_az_on_given_date, \
set_time_on_given_date, set_az_on_given_date, sidereal_time
def __repr__(self):
if self.radius is not None:
radius = '%.2f' % (self.radius)
else:
radius = 'NA'
return "<SNR %s RA=%s Dec=%s Radius=%s\">" % \
(self.name, ephem.hours(np.deg2rad(self.ra)), ephem.degrees(np.deg2rad(self.dec)), radius)
def write_hits(self,sidtime):
# Create localtime structure for producing filename
foo = time.localtime()
pfx = self.prefix
filenamestr = "%s/%04d%02d%02d%02d" % (pfx, foo.tm_year,
foo.tm_mon, foo.tm_mday, foo.tm_hour)
# Open the data file, appending
hits_file = open (filenamestr+".seti","a")
# Write sidtime first
hits_file.write(str(ephem.hours(sidtime))+" "+str(self.decln)+" ")
#
# Then write the hits/hit intensities buffers with enough
# "syntax" to allow parsing by external (not yet written!)
# "stuff".
#
for i in range(0,self.nhitlines):
hits_file.write(" ")
for j in range(0,self.nhits):
hits_file.write(str(self.hits_array[j,i])+":")
hits_file.write(str(self.hit_intensities[j,i])+",")
hits_file.write("\n")
hits_file.close()
return
def __init__(self, obsnum=' ', MPprovisional=' ', discovery=' ', note1=' ',
note2='C', obsdate=ephem.date('2000/01/01'), ra_obs_J2000=ephem.hours(0), dec_obs_J2000=ephem.degrees(0),
mag=99, band='r', observatoryCode='W84', newobject=True):
self.spaces = []
a = ''
one_space = ' '
for i in range(20):
self.spaces.append(a)
a += one_space
self.newobject = newobject
self.obsnum = self.setobsnum(obsnum)
self.MPprovisional = self.setMPprovisional(MPprovisional)
if discovery==' ' or discovery=='*':
self.discovery = discovery
else:
print 'Error, unrecognized discovery flag, should be * or one blank space'
if len(note1)==1:
self.note1 = note1
else:
print 'Error, note1 must have length 1'
if len(note2)==1:
self.note2 = note2
else:
print 'Error, note2 must have length 1'
self.obsdate = self.setObsdate(obsdate) # YYYY MM DD.dddddd, with precision normally given to 0.00001d (about 0.8s). For DES data should use 0.000001d
self.ra_obs_J2000 = self.setRa(ra_obs_J2000)
self.dec_obs_J2000 = self.setDec(dec_obs_J2000)
self.mag_band = self.setMagBand(mag, band)
self.observatoryCode = observatoryCode
self.record = self.obsnum+self.MPprovisional+self.discovery+self.note1+self.note2+self.obsdate+self.ra_obs_J2000 \
+self.dec_obs_J2000+self.spaces[9]+self.mag_band+self.spaces[6]+self.observatoryCode
def sexagesimal(ra, dec):
'''
Return the sexagesimal representation, as pyEphem
objects, of the coordinates (ra, dec), which are
taken to be in decimal degree format.
'''
return hours(float(ra) * np.pi/180), degrees(float(dec) * np.pi/180)
def decimal(ra, dec):
'''
Return the decimal degree representation of the
coordinates (ra, dec), which are taken to be in
radians (or pyEphem objects stored that way).
'''
return hours(ra) * 180/np.pi, degrees(dec) * 180/np.pi
def xy2radec(x, y):
lon, lat = map(x, y, inverse=True)
lon = (180 + kwds["ra"] - lon) % 360 # lon = (360 - lon) % 360
lon *= a.img.deg2rad
lat *= a.img.deg2rad
ra, dec = ephem.hours(lon), ephem.degrees(lat)
return ra, dec