def date2dict_times(date):
day = Time(date, format='iso')
longitude = '78d57m53s'
latitude = '32d46m44s'
elevation = 4500 * u.m
location = EarthLocation.from_geodetic(longitude, latitude, elevation)
iaohanle = Observer(location=location,
name="IAO",
timezone='Asia/Kolkata',
description="GROWTH-India 70cm telescope")
sunset_iao = iaohanle.sun_set_time(day, which='next')
sunrise_iao = iaohanle.sun_rise_time(day, which='next')
twelve_twil_eve_iao = iaohanle.twilight_evening_nautical(day, which='next')
eighteen_twil_eve_iao = iaohanle.twilight_evening_astronomical(
day, which='next')
twelve_twil_morn_iao = iaohanle.twilight_morning_nautical(day,
which='next')
eighteen_twil_morn_iao = iaohanle.twilight_morning_astronomical(
day, which='next')
dict_times = OrderedDict()
dict_times['Sunset '] = time2utc_ist(sunset_iao)
dict_times['Sunrise '] = time2utc_ist(sunrise_iao)
dict_times['Twelve degree Evening Twilight '] = time2utc_ist(
twelve_twil_eve_iao)
dict_times['Eighteen degree Evening Twilight '] = time2utc_ist(
eighteen_twil_eve_iao)
dict_times['Twelve degree Morning Twilight '] = time2utc_ist(
twelve_twil_morn_iao)
dict_times['Eighteen degree Morning Twilight '] = time2utc_ist(
eighteen_twil_morn_iao)
return dict_times
def astronomical_twilight(self, date_obs,
site_longitude=30.335555,
site_latitude=36.824166,
site_elevation=2500,
site_name="tug",
time_zone="Europe/Istanbul",
which="next"):
"""
It calculates astronomical twilight.
@param date_obs
@type date_obs: date
@param site_longitude: Site longitude.
@type site_longitude: float
@param site_latitude: Site latitude.
@type site_latitude: float
@param site_elevation: Site elevation.
@type site_elevation: float
@param site_name: Station name: T60|T100|RTT150.
@type site_name: string
@param time_zone: Time zone.
@type time_zone: int
@param which: Which.
@type which: string
@return: tuple
"""
# TUG's location info settings
tug = Observer(longitude=site_longitude*u.deg,
latitude=site_latitude*u.deg,
elevation=site_elevation*u.m,
name=site_name,
timezone=time_zone)
# convert date astropy date format
astropy_time = Time(date_obs)
# evening tw calculate
et = tug.twilight_evening_astronomical(astropy_time,
which=which)
# morning tw calculate
mt = tug.twilight_morning_astronomical(astropy_time,
which=which)
# localized time conversion
return(tug.astropy_time_to_datetime(mt),
tug.astropy_time_to_datetime(et))
def astronomical_twilight(self,
date_obs,
site_longitude=30.335555,
site_latitude=36.824166,
site_elevation=2500,
site_name="tug",
time_zone="Europe/Istanbul",
which="next"):
"""
It calculates astronomical twilight.
@param date_obs
@type date_obs: date
@param site_longitude: Site longitude.
@type site_longitude: float
@param site_latitude: Site latitude.
@type site_latitude: float
@param site_elevation: Site elevation.
@type site_elevation: float
@param site_name: Station name: T60|T100|RTT150.
@type site_name: string
@param time_zone: Time zone.
@type time_zone: int
@param which: Which.
@type which: string
@return: tuple
"""
# TUG's location info settings
tug = Observer(longitude=site_longitude * u.deg,
latitude=site_latitude * u.deg,
elevation=site_elevation * u.m,
name=site_name,
timezone=time_zone)
# convert date astropy date format
astropy_time = Time(date_obs)
# evening tw calculate
et = tug.twilight_evening_astronomical(astropy_time, which=which)
# morning tw calculate
mt = tug.twilight_morning_astronomical(astropy_time, which=which)
# localized time conversion
return (tug.astropy_time_to_datetime(mt),
tug.astropy_time_to_datetime(et))
def get_twilights(start, end):
""" Determine sunrise and sunset times """
location = EarthLocation(
lat=+19.53602,
lon=-155.57608,
height=3400,
)
obs = Observer(location=location, name='VYSOS', timezone='US/Hawaii')
sunset = obs.sun_set_time(Time(start), which='next').datetime
sunrise = obs.sun_rise_time(Time(start), which='next').datetime
# Calculate and order twilights and set plotting alpha for each
twilights = [
(start, 'start', 0.0),
(sunset, 'sunset', 0.0),
(obs.twilight_evening_civil(Time(start),
which='next').datetime, 'ec', 0.1),
(obs.twilight_evening_nautical(Time(start),
which='next').datetime, 'en', 0.2),
(obs.twilight_evening_astronomical(Time(start),
which='next').datetime, 'ea', 0.3),
(obs.twilight_morning_astronomical(Time(start),
which='next').datetime, 'ma', 0.5),
(obs.twilight_morning_nautical(Time(start),
which='next').datetime, 'mn', 0.3),
(obs.twilight_morning_civil(Time(start),
which='next').datetime, 'mc', 0.2),
(sunrise, 'sunrise', 0.1),
]
twilights.sort(key=lambda x: x[0])
final = {
'sunset': 0.1,
'ec': 0.2,
'en': 0.3,
'ea': 0.5,
'ma': 0.3,
'mn': 0.2,
'mc': 0.1,
'sunrise': 0.0
}
twilights.append((end, 'end', final[twilights[-1][1]]))
return twilights
def get_twilights(self, config=None):
""" Determine sunrise and sunset times """
print(' Determining sunrise, sunset, and twilight times')
if config is None:
from pocs.utils.config import load_config as pocs_config
config = pocs_config()['location']
location = EarthLocation(
lat=config['latitude'],
lon=config['longitude'],
height=config['elevation'],
)
obs = Observer(location=location, name='PANOPTES',
timezone=config['timezone'])
sunset = obs.sun_set_time(Time(self.start), which='next').datetime
sunrise = obs.sun_rise_time(Time(self.start), which='next').datetime
# Calculate and order twilights and set plotting alpha for each
twilights = [(self.start, 'start', 0.0),
(sunset, 'sunset', 0.0),
(obs.twilight_evening_civil(Time(self.start),
which='next').datetime, 'ec', 0.1),
(obs.twilight_evening_nautical(Time(self.start),
which='next').datetime, 'en', 0.2),
(obs.twilight_evening_astronomical(Time(self.start),
which='next').datetime, 'ea', 0.3),
(obs.twilight_morning_astronomical(Time(self.start),
which='next').datetime, 'ma', 0.5),
(obs.twilight_morning_nautical(Time(self.start),
which='next').datetime, 'mn', 0.3),
(obs.twilight_morning_civil(Time(self.start),
which='next').datetime, 'mc', 0.2),
(sunrise, 'sunrise', 0.1),
]
twilights.sort(key=lambda x: x[0])
final = {'sunset': 0.1, 'ec': 0.2, 'en': 0.3, 'ea': 0.5,
'ma': 0.3, 'mn': 0.2, 'mc': 0.1, 'sunrise': 0.0}
twilights.append((self.end, 'end', final[twilights[-1][1]]))
return twilights
def get_twilights(start, end, webcfg, nsample=256):
""" Determine sunrise and sunset times """
location = c.EarthLocation(
lat=webcfg['site'].getfloat('site_lat'),
lon=webcfg['site'].getfloat('site_lon'),
height=webcfg['site'].getfloat('site_elevation'),
)
obs = Observer(location=location, name=webcfg['site'].get('name', ''))
sunset = obs.sun_set_time(Time(start), which='next').datetime
sunrise = obs.sun_rise_time(Time(start), which='next').datetime
# Calculate and order twilights and set plotting alpha for each
twilights = [
(start, 'start', 0.0),
(sunset, 'sunset', 0.0),
(obs.twilight_evening_civil(Time(start),
which='next').datetime, 'ec', 0.1),
(obs.twilight_evening_nautical(Time(start),
which='next').datetime, 'en', 0.2),
(obs.twilight_evening_astronomical(Time(start),
which='next').datetime, 'ea', 0.3),
(obs.twilight_morning_astronomical(Time(start),
which='next').datetime, 'ma', 0.5),
(obs.twilight_morning_nautical(Time(start),
which='next').datetime, 'mn', 0.3),
(obs.twilight_morning_civil(Time(start),
which='next').datetime, 'mc', 0.2),
(sunrise, 'sunrise', 0.1),
]
twilights.sort(key=lambda x: x[0])
final = {
'sunset': 0.1,
'ec': 0.2,
'en': 0.3,
'ea': 0.5,
'ma': 0.3,
'mn': 0.2,
'mc': 0.1,
'sunrise': 0.0
}
twilights.append((end, 'end', final[twilights[-1][1]]))
return twilights
def calculate_twilights(date):
""" Determine sunrise and sunset times """
from astropy import units as u
from astropy.time import Time
from astropy.coordinates import EarthLocation
from astroplan import Observer
h = 4.2 * u.km
R = (1.0 * u.earthRad).to(u.km)
d = np.sqrt(h * (2 * R + h))
phi = (np.arccos((d / R).value) * u.radian).to(u.deg)
MK = phi - 90 * u.deg
location = EarthLocation(
lat=19 + 49 / 60 + 33.40757 / 60**2,
lon=-(155 + 28 / 60 + 28.98665 / 60**2),
height=4159.58,
)
obs = Observer(location=location, name='Keck', timezone='US/Hawaii')
date = Time(dt.strptime(f'{date} 18:00:00', '%Y-%m-%d %H:%M:%S'))
t = {}
sunset = obs.sun_set_time(date, which='nearest', horizon=MK).datetime
t['seto'] = sunset
t['ento'] = obs.twilight_evening_nautical(Time(sunset),
which='next').datetime
t['eato'] = obs.twilight_evening_astronomical(Time(sunset),
which='next').datetime
t['mato'] = obs.twilight_morning_astronomical(Time(sunset),
which='next').datetime
t['mnto'] = obs.twilight_morning_nautical(Time(sunset),
which='next').datetime
t['riseo'] = obs.sun_rise_time(Time(sunset), which='next').datetime
t['set'] = t['seto'].strftime('%H:%M UT')
t['ent'] = t['ento'].strftime('%H:%M UT')
t['eat'] = t['eato'].strftime('%H:%M UT')
t['mat'] = t['mato'].strftime('%H:%M UT')
t['mnt'] = t['mnto'].strftime('%H:%M UT')
t['rise'] = t['riseo'].strftime('%H:%M UT')
return t
def calculate_twilights(date):
""" Determine sunrise and sunset times """
from astropy import units as u
from astropy.time import Time
from astropy.coordinates import EarthLocation
from astroplan import Observer
h = 4.2*u.km
R = (1.0*u.earthRad).to(u.km)
d = np.sqrt(h*(2*R+h))
phi = (np.arccos((d/R).value)*u.radian).to(u.deg)
MK = phi - 90*u.deg
location = EarthLocation(
lat=19+49/60+33.40757/60**2,
lon=-(155+28/60+28.98665/60**2),
height=4159.58,
)
obs = Observer(location=location, name='Keck', timezone='US/Hawaii')
date = Time(dt.strptime(f'{date} 18:00:00', '%Y-%m-%d %H:%M:%S'))
t = {}
sunset = obs.sun_set_time(date, which='nearest', horizon=MK).datetime
t['seto'] = sunset
t['ento'] = obs.twilight_evening_nautical(Time(sunset), which='next').datetime
t['eato'] = obs.twilight_evening_astronomical(Time(sunset), which='next').datetime
t['mato'] = obs.twilight_morning_astronomical(Time(sunset), which='next').datetime
t['mnto'] = obs.twilight_morning_nautical(Time(sunset), which='next').datetime
t['riseo'] = obs.sun_rise_time(Time(sunset), which='next').datetime
t['set'] = t['seto'].strftime('%H:%M UT')
t['ent'] = t['ento'].strftime('%H:%M UT')
t['eat'] = t['eato'].strftime('%H:%M UT')
t['mat'] = t['mato'].strftime('%H:%M UT')
t['mnt'] = t['mnto'].strftime('%H:%M UT')
t['rise'] = t['riseo'].strftime('%H:%M UT')
return t
def observe(request, method="POST"):
if request.POST['observing_date'] == "":
messages.error(request, 'Please choose a date!')
if request.POST['name'] == "":
messages.error(request, 'Object name cannot be empty!')
if request.POST['ra'] == "":
messages.error(request, 'Object RA cannot be empty!')
if request.POST['dec'] == "":
messages.error(request, 'Object Dec cannot be empty!')
if request.POST['observing_date'] == "" or request.POST[
'name'] == "" or request.POST['ra'] == "" or request.POST[
'dec'] == "":
return redirect('/')
observatory = None
offset = None
for idx, val in enumerate(T['name']):
if val == request.POST['observatory']:
observatory = Observer(longitude=T['longitude'][idx] * u.deg,
latitude=T['latitude'][idx] * u.deg,
elevation=T['altitude'][idx] * u.m,
name=T['name'][idx])
today = datetime.now()
if tf.certain_timezone_at(lat=T['latitude'][idx],
lng=T['longitude'][idx]) == None:
return redirect('/error')
tz_target = timezone(
tf.certain_timezone_at(lat=T['latitude'][idx],
lng=T['longitude'][idx]))
# ATTENTION: tf.certain_timezone_at(...) could be None! handle error case
today_target = tz_target.localize(today)
today_utc = utc.localize(today)
offset = (today_utc - today_target).total_seconds() * u.s
# # offset = offsetfunction(observatory)
observe_date = Time(request.POST['observing_date'] + ' 00:00:00',
format='iso')
sunset_here = observatory.sun_set_time(observe_date,
which="nearest") + offset
sunrise_here = observatory.sun_rise_time(observe_date,
which="next") + offset
midnight_here = observatory.midnight(observe_date,
which="nearest") + offset
astro_set = observatory.twilight_evening_astronomical(observe_date,
which='nearest')
astro_rise = observatory.twilight_morning_astronomical(observe_date,
which='next')
coords = SkyCoord(request.POST['ra'], request.POST['dec'], frame='icrs')
target = FixedTarget(name=request.POST['name'], coord=coords)
start_time = astro_set
end_time = astro_rise
delta_t = end_time - start_time
observe_time = start_time + delta_t * np.linspace(0.0, 2.0, 100)
plt.ioff()
sky = plot_sky(target, observatory, observe_time)
sky.figure.savefig('apps/project_app/static/project_app/plot_sky.png')
plt.close()
plt.ioff()
airmass = plot_airmass(target, observatory, observe_time)
airmass.figure.savefig(
'apps/project_app/static/project_app/plot_airmass.png')
plt.close()
plt.ioff()
finder_image = plot_finder_image(target)
finder_image[0].figure.savefig(
'apps/project_app/static/project_app/plot_finder_image.png')
plt.close()
request.session['context'] = {
"sunset": Time(sunset_here, format="iso").value,
"sunrise": Time(sunrise_here, format="iso").value,
"date": Time(observe_date, format="iso").value,
"midnight": Time(midnight_here, format="iso").value,
"site": request.POST['observatory'],
"ra": request.POST['ra'],
"dec": request.POST['dec'],
"name": request.POST['name']
}
return redirect('/display')
def main(args=None):
p = parser()
opts = p.parse_args(args)
# Late imports
import operator
import sys
from astroplan import Observer
from astroplan.plots import plot_airmass
from astropy.coordinates import EarthLocation, SkyCoord
from astropy.table import Table
from astropy.time import Time
from astropy import units as u
from matplotlib import dates
from matplotlib.cm import ScalarMappable
from matplotlib.colors import Normalize
from matplotlib.patches import Patch
from matplotlib import pyplot as plt
from tqdm import tqdm
import pytz
from ..io import fits
from .. import moc
from .. import plot # noqa
from ..extern.quantile import percentile
if opts.site is None:
if opts.site_longitude is None or opts.site_latitude is None:
p.error('must specify either --site or both '
'--site-longitude and --site-latitude')
location = EarthLocation(lon=opts.site_longitude * u.deg,
lat=opts.site_latitude * u.deg,
height=(opts.site_height or 0) * u.m)
if opts.site_timezone is not None:
location.info.meta = {'timezone': opts.site_timezone}
observer = Observer(location)
else:
if not ((opts.site_longitude is None) and
(opts.site_latitude is None) and (opts.site_height is None) and
(opts.site_timezone is None)):
p.error('argument --site not allowed with arguments '
'--site-longitude, --site-latitude, '
'--site-height, or --site-timezone')
observer = Observer.at_site(opts.site)
m = fits.read_sky_map(opts.input.name, moc=True)
# Make an empty airmass chart.
t0 = Time(opts.time) if opts.time is not None else Time.now()
t0 = observer.midnight(t0)
ax = plot_airmass([], observer, t0, altitude_yaxis=True)
# Remove the fake source and determine times that were used for the plot.
del ax.lines[:]
times = Time(np.linspace(*ax.get_xlim()), format='plot_date')
theta, phi = moc.uniq2ang(m['UNIQ'])
coords = SkyCoord(phi, 0.5 * np.pi - theta, unit='rad')
prob = moc.uniq2pixarea(m['UNIQ']) * m['PROBDENSITY']
levels = np.arange(90, 0, -10)
nlevels = len(levels)
percentiles = np.concatenate((50 - 0.5 * levels, 50 + 0.5 * levels))
airmass = np.column_stack([
percentile(condition_secz(coords.transform_to(observer.altaz(t)).secz),
percentiles,
weights=prob) for t in tqdm(times)
])
cmap = ScalarMappable(Normalize(0, 100), plt.get_cmap())
for level, lo, hi in zip(levels, airmass[:nlevels], airmass[nlevels:]):
ax.fill_between(
times.plot_date,
clip_verylarge(lo), # Clip infinities to large but finite values
clip_verylarge(hi), # because fill_between cannot handle inf
color=cmap.to_rgba(level),
zorder=2)
ax.legend([Patch(facecolor=cmap.to_rgba(level)) for level in levels],
['{}%'.format(level) for level in levels])
# ax.set_title('{} from {}'.format(m.meta['objid'], observer.name))
# Adapted from astroplan
start = times[0]
twilights = [
(times[0].datetime, 0.0),
(observer.sun_set_time(Time(start), which='next').datetime, 0.0),
(observer.twilight_evening_civil(Time(start),
which='next').datetime, 0.1),
(observer.twilight_evening_nautical(Time(start),
which='next').datetime, 0.2),
(observer.twilight_evening_astronomical(Time(start),
which='next').datetime, 0.3),
(observer.twilight_morning_astronomical(Time(start),
which='next').datetime, 0.4),
(observer.twilight_morning_nautical(Time(start),
which='next').datetime, 0.3),
(observer.twilight_morning_civil(Time(start),
which='next').datetime, 0.2),
(observer.sun_rise_time(Time(start), which='next').datetime, 0.1),
(times[-1].datetime, 0.0),
]
twilights.sort(key=operator.itemgetter(0))
for i, twi in enumerate(twilights[1:], 1):
if twi[1] != 0:
ax.axvspan(twilights[i - 1][0],
twilights[i][0],
ymin=0,
ymax=1,
color='grey',
alpha=twi[1],
linewidth=0)
if twi[1] != 0.4:
ax.axvspan(twilights[i - 1][0],
twilights[i][0],
ymin=0,
ymax=1,
color='white',
alpha=0.8 - 2 * twi[1],
zorder=3,
linewidth=0)
# Add local time axis
timezone = (observer.location.info.meta or {}).get('timezone')
if timezone:
tzinfo = pytz.timezone(timezone)
ax2 = ax.twiny()
ax2.set_xlim(ax.get_xlim())
ax2.set_xticks(ax.get_xticks())
ax2.xaxis.set_major_formatter(dates.DateFormatter('%H:%M', tz=tzinfo))
plt.setp(ax2.get_xticklabels(), rotation=-30, ha='right')
ax2.set_xlabel("Time from {} [{}]".format(
min(times).to_datetime(tzinfo).date(), timezone))
if opts.verbose:
# Write airmass table to stdout.
times.format = 'isot'
table = Table(masked=True)
table['time'] = times
table['sun_alt'] = np.ma.masked_greater_equal(
observer.sun_altaz(times).alt, 0)
table['sun_alt'].format = lambda x: '{}'.format(int(np.round(x)))
for p, data in sorted(zip(percentiles, airmass)):
table[str(p)] = np.ma.masked_invalid(data)
table[str(p)].format = lambda x: '{:.01f}'.format(np.around(x, 1))
table.write(sys.stdout, format='ascii.fixed_width')
# Show or save output.
opts.output()
sunsets = np.unique(np.round(sunsets.mjd, decimals=4))
names = [
'night', 'sunset', 'sun_n12_setting', 'sun_n18_setting',
'sun_n18_rising', 'sun_n12_rising', 'sunrise', 'moonrise', 'moonset'
]
types = [int]
types.extend([float] * (len(names) - 1))
almanac = np.zeros(sunsets.size, dtype=list(zip(names, types)))
almanac['sunset'] = sunsets
times = Time(sunsets, format='mjd')
print('evening twilight 1')
almanac['sun_n12_setting'] = observer.twilight_evening_nautical(times).mjd
almanac['sun_n18_setting'] = observer.twilight_evening_astronomical(
times).mjd
almanac['sun_n18_rising'] = observer.twilight_morning_astronomical(
times).mjd
almanac['sun_n12_rising'] = observer.twilight_morning_nautical(times).mjd
almanac['sunrise'] = observer.sun_rise_time(times).mjd
almanac['moonset'] = observer.moon_set_time(times).mjd
print('moonrise')
almanac['moonrise'] = observer.moon_rise_time(times).mjd
results.append(almanac)
almanac = np.concatenate(results)
umjds, indx = np.unique(almanac['sunset'], return_index=True)
almanac = almanac[indx]
almanac['night'] = np.arange(almanac['night'].size)
np.savez('sunsets.npz', almanac=almanac)
def eop(self):
IERS_A_in_cache()
# astroplan.get_IERS_A_or_workaround()
iers.conf.auto_download = False
iers.conf.auto_max_age = None
now = Time.now()
longitude = '78d57m53s'
latitude = '32d46m44s'
elevation = 4500 * u.m
location = EarthLocation.from_geodetic(longitude, latitude, elevation)
iaohanle = Observer(location=location,
timezone='Asia/Kolkata',
name="IAO",
description="IAO Hanle telescopes")
iaohanle
# Calculating the sunset, midnight and sunrise times for our observatory
sunset_iao = iaohanle.sun_set_time(now, which='nearest')
eve_twil_iao = iaohanle.twilight_evening_astronomical(now,
which='nearest')
midnight_iao = iaohanle.midnight(now, which='next')
morn_twil_iao = iaohanle.twilight_morning_astronomical(now,
which='next')
sunrise_iao = iaohanle.sun_rise_time(now, which='next')
moon_rise = iaohanle.moon_rise_time(eve_twil_iao, which='nearest')
moon_set = iaohanle.moon_set_time(now, which='nearest')
# moon_alt = iaohanle.moon_altaz(now).alt
# moon_az = iaohanle.moon_altaz(now).az
#lst_now = iaohanle.local_sidereal_time(now)
#lst_mid = iaohanle.local_sidereal_time(midnight_iao)
#print("LST at IAO now is {0:.2f}".format(lst_now))
#print("LST at IAO at local midnight will be {0:.2f}".format(lst_mid))
Automation.moon_strength = moon_illumination(midnight_iao)
observing_time = (morn_twil_iao - eve_twil_iao).to(u.h)
#print("Total Night hours at IAO tonight {0:.1f} ".format(observing_time))
img = Image.new('RGB', (850, 320), color=(0, 0, 0))
fnt = ImageFont.truetype(
'/var/lib/defoma/gs.d/dirs/fonts/DejaVuSerif.ttf', 15)
d = ImageDraw.Draw(img)
d.text((10, 11),
"IAO Hanle Coordinates: " + str(iaohanle),
font=fnt,
fill=(255, 255, 255))
d.text((10, 71),
"Moon Illumination Strength : " +
str(moon_illumination(midnight_iao)),
font=fnt,
fill=(255, 255, 255))
d.text((10, 101),
"Sunset : " +
Time(sunset_iao, out_subfmt='date_hms').iso + " UTC",
font=fnt,
fill=(255, 255, 255))
d.text((10, 131),
"Astronomical evening twilight : " +
Time(eve_twil_iao, out_subfmt='date_hms').iso + " UTC",
font=fnt,
fill=(255, 255, 255))
d.text((10, 161),
"Astronomical morning twilight : " +
Time(morn_twil_iao, out_subfmt='date_hms').iso + " UTC",
font=fnt,
fill=(255, 255, 255))
d.text((10, 191),
"Sunrise : " +
Time(sunrise_iao, out_subfmt='date_hms').iso + " UTC",
font=fnt,
fill=(255, 255, 255))
d.text((10, 221),
"Moon Rise : " +
Time(moon_rise, out_subfmt='date_hms').iso + " UTC",
font=fnt,
fill=(255, 255, 255))
d.text((10, 251),
"Moon Set : " +
Time(moon_set, out_subfmt='date_hms').iso + " UTC",
font=fnt,
fill=(255, 255, 255))
d.text((10, 281),
"Total Astronomical hours tonight : " +
str(observing_time),
font=fnt,
fill=(255, 255, 255))
img.save('tonight.png')
img.close()
t_start = eve_twil_iao
t_end = morn_twil_iao
# We can turn solar system objects into 'pseudo-fixed' targets to plan observations
mercury_midnight = FixedTarget(name='Mercury',
coord=get_body('mercury', midnight_iao))
mercury_midnight.coord
venus_midnight = FixedTarget(name='Venus',
coord=get_body('venus', midnight_iao))
venus_midnight.coord
uranus_midnight = FixedTarget(name='Uranus',
coord=get_body('uranus', midnight_iao))
uranus_midnight.coord
neptune_midnight = FixedTarget(name='Neptune',
coord=get_body('neptune', midnight_iao))
neptune_midnight.coord
saturn_midnight = FixedTarget(name='Saturn',
coord=get_body('saturn', midnight_iao))
saturn_midnight.coord
jupiter_midnight = FixedTarget(name='Jupiter',
coord=get_body('jupiter', midnight_iao))
jupiter_midnight.coord
mars_midnight = FixedTarget(name='Mars',
coord=get_body('mars', midnight_iao))
mars_midnight.coord
targets = [
mercury_midnight, venus_midnight, mars_midnight, jupiter_midnight,
saturn_midnight, uranus_midnight, neptune_midnight
]
targets
#for target in targets:
#print(iaohanle.target_rise_time(now, target, which='next', horizon=10 * u.deg).iso)
# iaohanle.altaz(now, targets[0])
# print(iaohanle.target_rise_time(now, target, which='next', horizon=10 * u.deg).iso)
# iaohanle.altaz(now, targets[0])
times = (t_start - 0.5 * u.h) + (t_end - t_start +
1 * u.h) * np.linspace(0.0, 1.0, 20)
for target in targets:
plot_sky(target, iaohanle, times)
plt.legend(loc=[1.0, 0])
plt.xlabel('Planets motion tonight')
# plt.ylim(4,0.5)
# plt.legend()
plt.savefig('planets_motion.png')
plt.close()
# plt.legend(loc=[1.1,0])
coords1 = SkyCoord(
'15h58m3s', '-18d10m0.0s',
frame='icrs') # coordinates of Andromeda Galaxy (M32)
tt1 = FixedTarget(name='Moon', coord=coords1)
tt1.coord
t_observe = t_start + (t_end - t_start) * np.linspace(0.0, 1.0, 20)
plot_sky(tt1, iaohanle, t_observe)
plt.xlabel('Moon motion tonight')
plt.savefig('moon_motion.png')
plt.close()
if (eve_twil_iao <= now):
Automation.eve_twilight_flag = 1
Automation.mor_twilight_flag = 0
Automation.moon_setting_flag = 0
elif (morn_twil_iao <= now):
Automation.eve_twilight_flag = 0
Automation.mor_twilight_flag = 1
Automation.moon_setting_flag = 0
elif (Automation.moon_strength > 0.30):
if (moon_rise <= now):
Automation.eve_twilight_flag = 0
Automation.mor_twilight_flag = 0
Automation.moon_setting_flag = 1
elif (moon_set <= now):
Automation.eve_twilight_flag = 1
Automation.mor_twilight_flag = 0
Automation.moon_setting_flag = 0
name="Lulin",
description="Lulin 1.0-m telescope")
# define functions
def getyearDate(year):
months = range(1, 13)
date_list = []
for month in months:
for day in range(monthrange(year, month)[1] + 1)[1:]:
str1 = '{}-{:02d}-{:02d}'.format(year, month, day)
date_list.append(str1)
return date_list
theyear = int(input('input year\n'))
days = getyearDate(theyear)
txtwrite = []
for day in days:
t = Time(day) + 15 * u.h
eve_twil = lulin.twilight_evening_astronomical(t, which='previous')
morn_twil = lulin.twilight_morning_astronomical(t, which='next')
eve_twil.format = 'unix'
morn_twil.format = 'unix'
print('{}\n'.format(day))
txtwrite.append('{} {} {}\n'.format(day, eve_twil.value, morn_twil.value))
with open('twil_time.txt', 'w') as f:
list(map(f.write, txtwrite))
def plan_when_transits_will_occur(
filename='targets.txt',
observatory='Southern African Large Telescope',
start='2017-06-22',
end='2017-06-28',
airmass_limit=2.5,
moon_distance=10,
do_secondary=True,
method='by_night'):
'''
Plan when targets will be visibile and transiting from a site.
Inputs
------
filename : str
A plain text file with the following columns:
target : The name of the target (e.g. J0555-57).
RA : The right ascension of the target (e.g. 05h55m32.62s).
DEC : The declination of the target (e.g. -57d17m26.1s).
epoch* : The epoch of the transit. Youc can either use:
epoch_HJD-2400000 : HJD - 24500000
epoch_BJD-2455000 : MJD
Period : The period of the system (days).
Secondary : can be True or False depending on whether you want
to see when the secondary transits will be.
observatory : str
The observatory you are observing from. See later for list of available
observatories (accepted by astropy).
start : str
The first night of observation (e.g. 2017-08-31).
end : str
The last night of observation (e.g. 2017-09-10).
airmass_limit : float
The maximum airmass you want to observe through.
moon_distance : float
The closest the target can be t the moon in arcmins.
do_secondary = True:
Look for secondary eclipses assuming circularised orbits.
Available observator names are:
'ALMA',
'Anglo-Australian Observatory',
'Apache Point',
'Apache Point Observatory',
'Atacama Large Millimeter Array',
'BAO',
'Beijing XingLong Observatory',
'Black Moshannon Observatory',
'CHARA',
'Canada-France-Hawaii Telescope',
'Catalina Observatory',
'Cerro Pachon',
'Cerro Paranal',
'Cerro Tololo',
'Cerro Tololo Interamerican Observatory',
'DCT',
'Discovery Channel Telescope',
'Dominion Astrophysical Observatory',
'Gemini South',
'Hale Telescope',
'Haleakala Observatories',
'Happy Jack',
'Jansky Very Large Array',
'Keck Observatory',
'Kitt Peak',
'Kitt Peak National Observatory',
'La Silla Observatory',
'Large Binocular Telescope',
'Las Campanas Observatory',
'Lick Observatory',
'Lowell Observatory',
'Manastash Ridge Observatory',
'McDonald Observatory',
'Medicina',
'Medicina Dish',
'Michigan-Dartmouth-MIT Observatory',
'Mount Graham International Observatory',
'Mt Graham',
'Mt. Ekar 182 cm. Telescope',
'Mt. Stromlo Observatory',
'Multiple Mirror Telescope',
'NOV',
'National Observatory of Venezuela',
'Noto',
'Observatorio Astronomico Nacional, San Pedro Martir',
'Observatorio Astronomico Nacional, Tonantzintla',
'Palomar',
'Paranal Observatory',
'Roque de los Muchachos',
'SAAO',
'SALT',
'SRT',
'Siding Spring Observatory',
'Southern African Large Telescope',
'Subaru',
'Subaru Telescope',
'Sutherland',
'Vainu Bappu Observatory',
'Very Large Array',
'W. M. Keck Observatory',
'Whipple',
'Whipple Observatory',
'aao',
'alma',
'apo',
'bmo',
'cfht',
'ctio',
'dao',
'dct',
'ekar',
'example_site',
'flwo',
'gemini_north',
'gemini_south',
'gemn',
'gems',
'greenwich',
'haleakala',
'irtf',
'keck',
'kpno',
'lapalma',
'lasilla',
'lbt',
'lco',
'lick',
'lowell',
'mcdonald',
'mdm',
'medicina',
'mmt',
'mro',
'mso',
'mtbigelow',
'mwo',
'noto',
'ohp',
'paranal',
'salt',
'sirene',
'spm',
'srt',
'sso',
'tona',
'vbo',
'vla'.
'''
###################
# Try reading table
###################
try:
target_table = Table.read(filename, format='ascii')
except:
raise ValueError(
'I cant open the target file (make sure its ascii with the following first line:\ntarget RA DEC epoch_HJD-2400000 Period Secondary'
)
##############################
# try reading observation site
##############################
try:
observation_site = coord.EarthLocation.of_site(observatory)
observation_handle = Observer(location=observation_site)
observation_handle1 = Observer.at_site(observatory)
except:
print(coord.EarthLocation.get_site_names())
raise ValueError('The site is not understood')
###################################
# Try reading start and end times
###################################
try:
start_time = Time(start + ' 12:01:00', location=observation_site)
end_time = Time(end + ' 12:01:00', location=observation_site)
number_of_nights = int(end_time.jd - start_time.jd)
time_range = Time([start + ' 12:01:00', end + ' 12:01:00'])
print('Number of nights: {}'.format(number_of_nights))
except:
raise ValueError('Start and end times not understood')
#####################
# Now do constraints
#####################
#try:
constraints = [
AltitudeConstraint(0 * u.deg, 90 * u.deg),
AirmassConstraint(3),
AtNightConstraint.twilight_civil()
]
#except:
# raise ValueError('Unable to get set constraints')
if method == 'by_night':
for i in range(number_of_nights):
start_time_tmp = start_time + TimeDelta(
i,
format='jd') # get start time (doesent need to be accurate)
end_time_tmp = start_time + TimeDelta(
i + 1,
format='jd') # get start time (doesent need to be accurate)
print('#' * 80)
start_time_tmpss = start_time_tmp.datetime.ctime().split(
) # ['Fri', 'Dec', '24', '12:00:00', '2010']
print('Night {} - {} {} {} {}'.format(i + 1, start_time_tmpss[0],
start_time_tmpss[2],
start_time_tmpss[1],
start_time_tmpss[-1]))
print('#' * 80)
# Now print Almnac information (sunset and end of evening twilight
print('Almnac:')
sun_set = observation_handle.sun_set_time(start_time_tmp,
which='next')
print('Sunset:\t\t\t\t\t\t\t' + sun_set.utc.datetime.ctime())
twilight_evening_astronomical = observation_handle.twilight_evening_astronomical(
start_time_tmp, which='next') # -18
twilight_evening_nautical = observation_handle.twilight_evening_nautical(
start_time_tmp, which='next') # -12
twilight_evening_civil = observation_handle.twilight_evening_civil(
start_time_tmp, which='next') # -6 deg
print('Civil evening twilight (-6 deg) (U.T.C):\t\t' +
twilight_evening_civil.utc.datetime.ctime())
print('Nautical evening twilight (-12 deg) (U.T.C):\t\t' +
twilight_evening_nautical.utc.datetime.ctime())
print('Astronomical evening twilight (-18 deg) (U.T.C):\t' +
twilight_evening_astronomical.utc.datetime.ctime())
print('\n')
twilight_morning_astronomical = observation_handle.twilight_morning_astronomical(
start_time_tmp, which='next') # -18
twilight_morning_nautical = observation_handle.twilight_morning_nautical(
start_time_tmp, which='next') # -12
twilight_morning_civil = observation_handle.twilight_morning_civil(
start_time_tmp, which='next') # -6 deg
print('Astronomical morning twilight (-18 deg) (U.T.C):\t' +
twilight_morning_astronomical.utc.datetime.ctime())
print('Nautical morning twilight (-12 deg) (U.T.C):\t\t' +
twilight_morning_nautical.utc.datetime.ctime())
print('Civil morning twilight (-6 deg) (U.T.C):\t\t' +
twilight_morning_civil.utc.datetime.ctime())
sun_rise = observation_handle.sun_rise_time(start_time_tmp,
which='next')
print('Sunrise:\t\t\t\t\t\t' + sun_rise.utc.datetime.ctime())
print('\n')
# stuff for creating plot
plot_mids = []
plot_names = []
plot_widths = []
for j in range(len(target_table)):
# Extract information
star_coordinates = coord.SkyCoord('{} {}'.format(
target_table['RA'][j], target_table['DEC'][j]),
unit=(u.hourangle, u.deg),
frame='icrs')
star_fixed_coord = FixedTarget(coord=star_coordinates,
name=target_table['target'][j])
####################
# Get finder image
####################
'''
plt.close()
try:
finder_image = plot_finder_image(star_fixed_coord,reticle=True,fov_radius=10*u.arcmin)
except:
pass
plt.savefig(target_table['target'][j]+'_finder_chart.eps')
'''
P = target_table['Period'][j]
Secondary_transit = target_table['Secondary'][j]
transit_half_width = TimeDelta(
target_table['width'][j] * 60 * 60 / 2,
format='sec') # in seconds for a TimeDelta
# now convert T0 to HJD -> JD -> BJD so we can cout period
if 'epoch_HJD-2400000' in target_table.colnames:
#print('Using HJD-2400000')
T0 = target_table['epoch_HJD-2400000'][j]
T0 = Time(T0 + 2400000, format='jd') # HJD given by WASP
ltt_helio = T0.light_travel_time(star_coordinates,
'heliocentric',
location=observation_site)
T0 = T0 - ltt_helio # HJD -> JD
ltt_bary = T0.light_travel_time(star_coordinates,
'barycentric',
location=observation_site)
T0 = T0 + ltt_bary # JD -> BJD
elif 'epoch_BJD-2455000' in target_table.colnames:
#print('Using BJD-2455000')
T0 = target_table['epoch_BJD-2455000'][j] + 2455000
T0 = Time(T0, format='jd') # BJD
else:
print('\n\n\n\n FAILE\n\n\n\n')
continue
##########################################################
# Now start from T0 and count in periods to find transits
##########################################################
# convert star and end time to BJD
ltt_bary_start_time = start_time_tmp.light_travel_time(
star_coordinates, 'barycentric',
location=observation_site) # + TimeDelta(i,format='jd')
start_time_bary = start_time_tmp + ltt_bary_start_time # + TimeDelta(i,format='jd') # convert start time to BJD
ltt_bary_end_time_tmp = end_time_tmp.light_travel_time(
star_coordinates, 'barycentric',
location=observation_site) # + TimeDelta(i,format='jd')
end_time_bary = end_time_tmp + ltt_bary_start_time #+ TimeDelta(i+1,format='jd') # convert end time to BJD and add 1 day 12pm -> 12pm the next day
elapsed = end_time_bary - start_time_bary # now this is 24 hours from the start day 12:00 pm
# now count transits
time = Time(T0.jd, format='jd') # make a temporary copy
transits = []
primary_count, secondary_count = 0, 0
while time.jd < end_time_bary.jd:
if (time.jd > start_time_bary.jd) and (time.jd <
end_time_bary.jd):
if is_observable(constraints,
observation_handle,
[star_fixed_coord],
times=[time])[0] == True:
transits.append(time)
primary_count += 1
if Secondary_transit == 'yes':
timesecondary = time + TimeDelta(P / 2, format='jd')
if (timesecondary.jd > start_time_bary.jd) and (
timesecondary.jd < end_time_bary.jd):
if is_observable(constraints,
observation_handle,
[star_fixed_coord],
times=[timesecondary])[0] == True:
transits.append(timesecondary)
secondary_count += 1
time = time + TimeDelta(P,
format='jd') # add another P to T0
# Now find visible transits
transits = [
i for i in transits
if is_observable(constraints,
observation_handle, [star_fixed_coord],
times=[i])[0] == True
]
if len(transits) == 0:
message = '{} has no transits.'.format(
target_table['target'][j])
print('-' * len(message))
print(message)
print('-' * len(message))
print('\n')
plt.close()
continue
else:
message = '{} has {} primary transits and {} secondary transits.'.format(
target_table['target'][j], primary_count,
secondary_count)
print('-' * len(message))
print(message)
print('RA: {}'.format(target_table['RA'][j]))
print('DEC: {}'.format(target_table['DEC'][j]))
print('Epoch: 2000')
print('T0 (BJD): {}'.format(T0.jd))
print('Period: {}'.format(P))
print('Transit width (hr): {}'.format(
target_table['width'][j]))
print('-' * len(message))
print('\n')
for i in transits:
# currently transit times are in BJD (need to convert to HJD to check
ltt_helio = i.light_travel_time(star_coordinates,
'barycentric',
location=observation_site)
ii = i - ltt_helio
ltt_helio = ii.light_travel_time(star_coordinates,
'heliocentric',
location=observation_site)
ii = ii + ltt_helio
transit_1 = i - transit_half_width - TimeDelta(
7200, format='sec') # ingress - 2 hr
transit_2 = i - transit_half_width - TimeDelta(
3600, format='sec') # ingress - 2 hr
transit_3 = i - transit_half_width # ingress
transit_4 = i + transit_half_width # egress
transit_5 = i + transit_half_width + TimeDelta(
3600, format='sec') # ingress - 2 hr
transit_6 = i + transit_half_width + TimeDelta(
7200, format='sec') # ingress - 2 hr
if (((i.jd - time.jd) / P) - np.floor(
(i.jd - time.jd) / P) < 0.1) or ((
(i.jd - time.jd) / P) - np.floor(
(i.jd - time.jd) / P) > 0.9):
print('Primary Transit:')
print('-' * len('Primary Transit'))
if 0.4 < ((i.jd - time.jd) / P) - np.floor(
(i.jd - time.jd) / P) < 0.6:
print('Secondary Transit')
print('-' * len('Secondary Transit'))
##################
# now get sirmass
##################
altaz = star_coordinates.transform_to(
AltAz(obstime=transit_1, location=observation_site))
hourangle = observation_handle1.target_hour_angle(
transit_1, star_coordinates)
hourangle = 24 * hourangle.degree / 360
if hourangle > 12:
hourangle -= 24
print('Ingress - 2hr (U.T.C):\t\t\t\t\t' +
transit_1.utc.datetime.ctime() +
'\tAirmass: {:.2f}\tHA:{:.2f}'.format(
altaz.secz, hourangle))
altaz = star_coordinates.transform_to(
AltAz(obstime=transit_2, location=observation_site))
hourangle = observation_handle1.target_hour_angle(
transit_2, star_coordinates)
hourangle = 24 * hourangle.degree / 360
if hourangle > 12:
hourangle -= 24
print('Ingress - 1hr (U.T.C):\t\t\t\t\t' +
transit_2.utc.datetime.ctime() +
'\tAirmass: {:.2f}\tHA:{:.2f}'.format(
altaz.secz, hourangle))
altaz = star_coordinates.transform_to(
AltAz(obstime=transit_3, location=observation_site))
hourangle = observation_handle1.target_hour_angle(
transit_3, star_coordinates)
hourangle = 24 * hourangle.degree / 360
if hourangle > 12:
hourangle -= 24
print('Ingress (U.T.C):\t\t\t\t\t' +
transit_3.utc.datetime.ctime() +
'\tAirmass: {:.2f}\tHA:{:.2f}'.format(
altaz.secz, hourangle))
altaz = star_coordinates.transform_to(
AltAz(obstime=i, location=observation_site))
hourangle = observation_handle1.target_hour_angle(
i, star_coordinates)
hourangle = 24 * hourangle.degree / 360
if hourangle > 12:
hourangle -= 24
print('Mid transit (U.T.C):\t\t\t\t\t' +
i.utc.datetime.ctime() +
'\tAirmass: {:.2f}\tHA:{:.2f}'.format(
altaz.secz, hourangle))
altaz = star_coordinates.transform_to(
AltAz(obstime=transit_4, location=observation_site))
hourangle = observation_handle1.target_hour_angle(
transit_4, star_coordinates)
hourangle = 24 * hourangle.degree / 360
if hourangle > 12:
hourangle -= 24
print('Egress (U.T.C):\t\t\t\t\t\t' +
transit_4.utc.datetime.ctime() +
'\tAirmass: {:.2f}\tHA:{:.2f}'.format(
altaz.secz, hourangle))
altaz = star_coordinates.transform_to(
AltAz(obstime=transit_5, location=observation_site))
hourangle = observation_handle1.target_hour_angle(
transit_5, star_coordinates)
hourangle = 24 * hourangle.degree / 360
if hourangle > 12:
hourangle -= 24
print('Egress + 1hr (U.T.C):\t\t\t\t\t' +
transit_5.utc.datetime.ctime() +
'\tAirmass: {:.2f}\tHA:{:.2f}'.format(
altaz.secz, hourangle))
altaz = star_coordinates.transform_to(
AltAz(obstime=transit_6, location=observation_site))
hourangle = observation_handle1.target_hour_angle(
transit_6, star_coordinates)
hourangle = 24 * hourangle.degree / 360
if hourangle > 12:
hourangle -= 24
print('Egress + 2hr (U.T.C):\t\t\t\t\t' +
transit_6.utc.datetime.ctime() +
'\tAirmass: {:.2f}\tHA:{:.2f}'.format(
altaz.secz, hourangle))
print('HJD {} (to check with http://var2.astro.cz/)\n'.
format(ii.jd))
# append stuff for plots
plot_mids.append(i) # astropy Time
plot_names.append(target_table['target'][j])
plot_widths.append(target_table['width'][j])
# Now plot
plt.close()
if len(plot_mids) == 0:
continue
date_formatter = dates.DateFormatter('%H:%M')
#ax.xaxis.set_major_formatter(date_formatter)
# now load dummy transit lightcurves
xp, yp = np.load('lc.npy')
xs, ys = np.load('lcs.npy')
# x = np.linspace(0, 2*np.pi, 400)
# y = np.sin(x**2)
subplots_adjust(hspace=0.000)
number_of_subplots = len(
plot_names) # number of targets transiting that night
time = sun_set + np.linspace(-1, 14,
100) * u.hour # take us to sunset
for i, v in enumerate(xrange(number_of_subplots)):
# exctract params
width = plot_widths[v]
name = plot_names[v]
mid = plot_mids[v]
# now set up dummy lc plot
x_tmp = mid + xp * (width /
2) * u.hour # get right width in hours
# now set up axis
v = v + 1
ax1 = subplot(number_of_subplots, 1, v)
ax1.xaxis.set_major_formatter(date_formatter)
if v == 1:
ax1.set_title(start)
# plot transit model
ax1.plot_date(x_tmp.plot_date, ys, 'k-')
# plot continuum
#xx =time.plot_date
#xx = [uu for uu in xx if (uu<min(x_tmp.plot_date)) or (uu>max(x_tmp.plot_date))]
#ax1.plot_date(xx, np.ones(len(xx)),'k--', alpha=0.3)
ax1.set_xlim(min(time.plot_date), max(time.plot_date))
#ax1.plot_date(mid.plot_date, 0.5, 'ro')
plt.setp(ax1.get_xticklabels(), rotation=30, ha='right')
ax1.set_ylabel(name, rotation=45, labelpad=20)
twilights = [
(sun_set.datetime, 0.0),
(twilight_evening_civil.datetime, 0.1),
(twilight_evening_nautical.datetime, 0.2),
(twilight_evening_astronomical.datetime, 0.3),
(twilight_morning_astronomical.datetime, 0.4),
(twilight_morning_nautical.datetime, 0.3),
(twilight_morning_civil.datetime, 0.2),
(sun_rise.datetime, 0.1),
]
for ii, twii in enumerate(twilights[1:], 1):
ax1.axvspan(twilights[ii - 1][0],
twilights[ii][0],
ymin=0,
ymax=1,
color='grey',
alpha=twii[1])
ax1.grid(alpha=0.5)
ax1.get_yaxis().set_ticks([])
if v != number_of_subplots:
ax1.get_xaxis().set_ticks([])
plt.xlabel('Time [U.T.C]')
#plt.tight_layout()
#plt.savefig('test.eps',format='eps')
plt.show()
obs.sun_rise_time(time_obs, which='previous') # moon rise obs.moon_rise(time_obs, which='nearest') # moon set obs.moon_set(time_obs, which='nearest') # The above functions can be called with an `angle` keyword argument to specify # a particular horizon angle for rising or setting, or can be called with # convenience functions for particular morning/evening twilight. # For example, to compute astronomical twilight by specifying the `angle`: obs.sun_set_time(time_obs, which='next', angle=18*u.degree) # evening (astronomical) twilight obs.twilight_evening_astronomical(time_obs) # evening (nautical) twilight obs.twilight_evening_nautical(time_obs) # evening (civil) twilight obs.twilight_evening_civil(time_obs) # morning (nautical) twilight obs.twilight_morning_nautical(time_obs) # morning (civil) twilight obs.twilight_morning_civil(time_obs) # morning (astronomical) twilight obs.twilight_morning_astronomical(time_obs)
import numpy as np
from astroplan import Observer
from astropy.coordinates import EarthLocation
import astropy.units as u
from astropy.time import Time
observer = Observer(longitude=-70.7494 * u.deg,
latitude=-30.2444 * u.deg,
elevation=2650.0 * u.m,
name="LSST")
mjd_start = 59853.5
times = Time(np.arange(mjd_start, mjd_start + 356.25 * 3, .3), format='mjd')
tt = observer.twilight_evening_astronomical(times)
ack = observer.moon_rise_time(times)
round_ack = np.round(ack.mjd, decimals=5)
def post_save_night(sender, **kwargs):
if not kwargs.get('raw', False):
night = kwargs['instance']
location = night.location
astropy_time = Time(datetime.combine(night.date, time(12)))
astropy_time_delta = TimeDelta(600.0, format='sec')
# guess if the moon is waxing or waning
if ephem.next_full_moon(night.date) - ephem.Date(night.date) < ephem.Date(night.date) - ephem.previous_full_moon(night.date):
waxing_moon = True
else:
waxing_moon = False
observer = Observer(
longitude=location.longitude,
latitude=location.latitude,
timezone='UTC'
)
moon_phase = observer.moon_phase(astropy_time).value
if waxing_moon:
moon_phase = (math.pi - moon_phase) / (2 * math.pi)
else:
moon_phase = (math.pi + moon_phase) / (2 * math.pi)
times = {
'sunset': observer.sun_set_time(astropy_time, which='next'),
'civil_dusk': observer.twilight_evening_civil(astropy_time, which='next'),
'nautical_dusk': observer.twilight_evening_nautical(astropy_time, which='next'),
'astronomical_dusk': observer.twilight_evening_astronomical(astropy_time, which='next'),
'midnight': observer.midnight(astropy_time, which='next'),
'astronomical_dawn': observer.twilight_morning_astronomical(astropy_time, which='next'),
'nautical_dawn': observer.twilight_morning_nautical(astropy_time, which='next'),
'civil_dawn': observer.twilight_morning_civil(astropy_time, which='next'),
'sunrise': observer.sun_rise_time(astropy_time, which='next'),
}
night.mjd = int(astropy_time.mjd) + 1
night.moon_phase = moon_phase
for key in times:
if times[key].jd > 0:
setattr(night, key, times[key].to_datetime(timezone=utc))
post_save.disconnect(post_save_night, sender=sender)
night.save()
post_save.connect(post_save_night, sender=sender)
moon_positions = []
for i in range(144):
moon_altitude = observer.moon_altaz(astropy_time).alt.degree
moon_position = MoonPosition(
timestamp=astropy_time.to_datetime(timezone=utc),
altitude=moon_altitude,
location=location
)
moon_positions.append(moon_position)
astropy_time += astropy_time_delta
MoonPosition.objects.bulk_create(moon_positions)
class tnsVis():
"""
Object visability methods for calculating airmass, lengths of observable
time for transient name server objects for different observing locations
and dates
"""
def __init__(self,
lat,
lon,
elevation,
ra,
dec,
discDate,
airmassConstraint=2):
self.airmassConstraint = airmassConstraint
self.altConstraint = math.degrees(math.asin(1 /
self.airmassConstraint))
self.location = EarthLocation(lat=lat, lon=lon, height=elevation * u.m)
self.discDate = discDate
self.observer = Observer(location=self.location, name="LT")
self.target = SkyCoord(ra=ra, dec=dec, unit=(u.hourangle, u.deg))
self.constraints = [
AirmassConstraint(self.airmassConstraint),
AtNightConstraint.twilight_astronomical()
]
print("Discovery Date :", discDate.value)
def time_since_discovery(self):
"""
Returns astropy Time delta object of time since Discovery to time now
"""
return Time.now() - self.discDate
def visible_time(self, date):
"""
For the evening after the date, specify the visible time within the
constraintsself.
Not really working at present
"""
# Find astronomical times for next night
darkStart = self.observer.twilight_evening_astronomical(date,
which=u'next')
darkEnd = self.observer.twilight_morning_astronomical(darkStart,
which=u'next')
# Find rise and set times
riseTime = self.observer.target_rise_time(date,
self.target,
which=u'next',
horizon=self.altConstraint *
u.deg)
setTime = self.observer.target_set_time(date,
self.target,
which=u'next',
horizon=self.altConstraint *
u.deg)
if (darkStart.value < riseTime.value) and (darkEnd.value >
setTime.value):
print("During night")
return setTime - riseTime
elif (darkStart.value > riseTime.value) and (darkEnd.value >
setTime.value):
print("Darkstart")
elif (darkStart.value < riseTime.value) and (darkEnd.value <
setTime.value):
print("Darkend")
elif (darkStart.value > riseTime.value) and (darkEnd.value <
setTime.value):
print("DarkstartandEnd")
else:
print("No Constraints matched!!")
def reportDate(self, name):
"""
Input ATel name and scrape TNS web page for value using regex
report the in astropy datetime format??
"""
# Find AT or SN name. Seems best to take off 1st 3 characters
objectAT = name[3:]
print(objectAT)
# Pull html down
try:
page = urllib.request.urlopen(
('https://wis-tns.weizmann.ac.il/object/' + objectAT))
bytes = page.read()
text = bytes.decode("utf8")
except urllib.error.HTTPError:
return ('notFound')
# Find the time_received value
pattern = re.compile(
r'class=\"cell-time_received\">\d\d\d\d-\d\d-\d\d \d\d:\d\d:\d\d')
match = re.findall(pattern, text)
if match:
# get down to YYYY-MM-DD HH:MM:SS value
pattern = re.compile(r'\d\d\d\d\-\d\d-\d\d \d\d:\d\d:\d\d')
reportDate = re.findall(pattern, match[0])[0]
return reportDate
else:
return 'notFound'
def reportDelay(self, date):
"""
Input the report date as an astropy Time object
return the difference between the discovery and report in units of days
"""
reportDelay = date - self.discDate
print("report : ", date)
print("discdate : ", self.discDate)
print("report.Delay : ", reportDelay)
return reportDelay
def plot(self, date):
"""
Produce plot of the object visability for date
Modified from https://docs.astropy.org/en/stable/generated/examples/coordinates/plot_obs-planning.html
"""
import matplotlib.pyplot as plt
from astropy.visualization import astropy_mpl_style
plt.style.use(astropy_mpl_style)
midnight = self.observer.midnight(date, which='next')
delta_midnight = np.linspace(-2, 10, 100) * u.hour
frame_night = AltAz(obstime=midnight + delta_midnight,
location=self.location)
targetaltazs_night = self.target.transform_to(frame_night)
# Use `~astropy.coordinates.get_sun` to find the location of the Sun at 1000
from astropy.coordinates import get_sun
delta_midnight = np.linspace(-12, 12, 1000) * u.hour
times = midnight + delta_midnight
frame = AltAz(obstime=times, location=self.location)
sunaltazs = get_sun(times).transform_to(frame)
# Do the same with `~astropy.coordinates.get_moon` to find when the moon is
# up. Be aware that this will need to download a 10MB file from the internet
# to get a precise location of the moon.
from astropy.coordinates import get_moon
moon = get_moon(times)
moonaltazs = moon.transform_to(frame)
##############################################################################
# Find the alt,az coordinates of M33 at those same times:
targetaltazs = self.target.transform_to(frame)
##############################################################################
# Make a beautiful figure illustrating nighttime and the altitudes of M33 and
# the Sun over that time:
plt.plot(delta_midnight, sunaltazs.alt, color='r', label='Sun')
plt.plot(delta_midnight,
moonaltazs.alt,
color=[0.75] * 3,
ls='--',
label='Moon')
plt.scatter(delta_midnight,
targetaltazs.alt,
c=targetaltazs.az,
label='Target',
lw=0,
s=8,
cmap='viridis')
plt.fill_between(delta_midnight.to('hr').value,
0,
90,
sunaltazs.alt < -0 * u.deg,
color='0.5',
zorder=0)
plt.fill_between(delta_midnight.to('hr').value,
0,
90,
sunaltazs.alt < -18 * u.deg,
color='k',
zorder=0)
plt.hlines(self.altConstraint,
-12,
12,
colors='red',
linestyles='dotted',
lw=1)
plt.colorbar().set_label('Azimuth [deg]')
plt.legend(loc='upper left')
plt.xlim(-12, 12)
plt.xticks(np.arange(13) * 2 - 12)
plt.ylim(0, 90)
plt.xlabel('Hours from Local Midnight')
plt.ylabel('Altitude [deg]')
plt.show()
def get_info(self, date):
"""
Prints useful info for a given time, for debugging mainly
Alt - Az of target
Alt - Az of sun
Alt - Az of moon
.....
"""
return
def objVis(self):
"""
Checks if transit is in between twilight hours. If not return error
Returns the amount of time the object is above given airmass
"""
objVis = is_observable(self.constraints,
self.observer,
self.target,
time_range=(self.discDate,
self.discDate + 1 * u.day))[0]
return objVis
types.extend([float] * (len(names) - 1))
base_al = np.zeros(1, dtype=list(zip(names, types)))
while mjd < (mjd_start + duration):
times = Time(mjd, format='mjd')
sunsets = observer.sun_set_time(times, which='next')
times = sunsets
almanac = base_al.copy()
almanac['sunset'] = sunsets.mjd
almanac['moonset'] = observer.moon_set_time(times, which='next').mjd
almanac['moonrise'] = observer.moon_rise_time(times, which='next').mjd
almanac['sun_n12_setting'] = observer.twilight_evening_nautical(
times, which='next').mjd
times = observer.twilight_evening_astronomical(times, which='next')
almanac['sun_n18_setting'] = times.mjd
almanac['sun_n18_rising'] = observer.twilight_morning_astronomical(
times, which='next').mjd
almanac['sun_n12_rising'] = observer.twilight_morning_nautical(
times, which='next').mjd
almanac['sunrise'] = observer.sun_rise_time(times, which='next').mjd
results.append(almanac)
mjd = almanac['sunrise'] + t_step
progress = (mjd - mjd_start) / duration * 100
text = "\rprogress = %.2f%%" % progress
sys.stdout.write(text)
sys.stdout.flush()
almanac = np.concatenate(results)
