def getGear(self,arg):
data = {'acceleration':engine['acceleration'],\
'pointError':str(ephem.degrees(self.m.axis1.minMotorStep)),\
'vmax':str(ephem.degrees(self.m.axis1.vmax)),\
'FullTurnSteps':self.m.axis1.FullTurnSteps}
print data
return json.dumps(data)
def __init__(self,config_file,base_directory='.'):
#S want to get the site from the control class, makes easy computing
#S LST and such
self.base_directory = base_directory
self.config_file = config_file
self.dt_fmt = '%Y%m%dT%H:%M:%S'
# load the config file
self.load_config()
# make the observer which will be used in calculations and what not
self.obs = ephem.Observer()
self.obs.lat = ephem.degrees(str(self.latitude)) # N
self.obs.lon = ephem.degrees(str(self.longitude)) # E
self.obs.horizon = ephem.degrees(str(self.sun_horizon))
self.obs.elevation = self.elevation # meters
self.time = datetime.datetime(2000,1,1,12,00,00)
self.obs.date = self.time
# an ephem sun and moon object for tracking the sun
self.sun = ephem.Sun()
self.sun.compute(self.obs)
self.moon = ephem.Moon()
self.moon.compute(self.obs)
# seconds between three obs
self.sep_limit = 120.*60.
# if you are using the simbad reader target list
self.target_list = simbad_reader.read_simbad(self.targets_file)
self.make_fixedBodies()
def planetstransit(date):
"""returns SHA and meridian passage for the navigational planets
"""
v = ephem.Venus()
mars = ephem.Mars()
j = ephem.Jupiter()
sat = ephem.Saturn()
obs = ephem.Observer()
obs.date = date
v.compute(date)
vsha = nadeg(2 * math.pi - ephem.degrees(v.g_ra).norm)
vtrans = time(obs.next_transit(v))
hpvenus = "%0.1f" % ((math.tan(6371 / (v.earth_distance * 149597870.7))) * 60 * 180 / math.pi)
obs.date = date
mars.compute(date)
marssha = nadeg(2 * math.pi - ephem.degrees(mars.g_ra).norm)
marstrans = time(obs.next_transit(mars))
hpmars = "%0.1f" % ((math.tan(6371 / (mars.earth_distance * 149597870.7))) * 60 * 180 / math.pi)
obs.date = date
j.compute(date)
jsha = nadeg(2 * math.pi - ephem.degrees(j.g_ra).norm)
jtrans = time(obs.next_transit(j))
obs.date = date
sat.compute(date)
satsha = nadeg(2 * math.pi - ephem.degrees(sat.g_ra).norm)
sattrans = time(obs.next_transit(sat))
return [vsha, vtrans, marssha, marstrans, jsha, jtrans, satsha, sattrans, hpmars, hpvenus]
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 __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 print_pyephem_parallactic_angle():
lat = 19.826218*u.deg
lon = -155.471999*u.deg
time = Time('2015-01-01 00:00:00')
LST = time.sidereal_time('mean', longitude=lon)
desired_HA_1 = 3*u.hourangle
desired_HA_2 = 19*u.hourangle # = -5*u.hourangle
obs = ephem.Observer()
obs.lat = '19:49:34.3848'
obs.lon = '-155:28:19.1964'
obs.elevation = 0
obs.date = time.datetime
pyephem_target1 = ephem.FixedBody()
pyephem_target1._ra = ephem.degrees((LST - desired_HA_1).to(u.rad).value)
pyephem_target1._dec = ephem.degrees((-30*u.deg).to(u.rad).value)
pyephem_target1.compute(obs)
pyephem_q1 = (float(pyephem_target1.parallactic_angle())*u.rad).to(u.deg)
pyephem_target2 = ephem.FixedBody()
pyephem_target2._ra = ephem.degrees((LST - desired_HA_2).to(u.rad).value)
pyephem_target2._dec = ephem.degrees((-30*u.deg).to(u.rad).value)
pyephem_target2.compute(obs)
pyephem_q2 = (float(pyephem_target2.parallactic_angle())*u.rad).to(u.deg)
print(pyephem_q1, pyephem_q2)
assert (obs.astropy_to_local_time(obs.local_to_astropy_time(dt)).replace(
tzinfo=None) == dt)
def dname(dec):
one = str((int(str(ephem.degrees(dec*n.pi/180)).split(':')[0])+100000))[-2::]
two = str((int(str(ephem.degrees(dec*n.pi/180)).split(':')[1])+100000))[-2::]
if dec < 0: add = '-'
else: add = '+'
ret = add + one + two
return ret
def print_pyephem_vega_rise_set():
"""
To run:
python -c 'from astroplan.tests.test_observer import print_pyephem_vega_rise_set as f; f()'
"""
lat = '00:00:00'
lon = '00:00:00'
elevation = 0.0 * u.m
pressure = 0
time = Time('2000-01-01 12:00:00')
vega_ra, vega_dec = (279.23473479*u.degree, 38.78368896*u.degree)
vega = SkyCoord(vega_ra, vega_dec)
obs = ephem.Observer()
obs.lat = lat
obs.lon = lon
obs.elevation = elevation
obs.date = time.datetime
obs.pressure = pressure
target = ephem.FixedBody()
target._ra = ephem.degrees(vega.ra.radian)
target._dec = ephem.degrees(vega.dec.radian)
target.compute(obs)
next_rising = obs.next_rising(target).datetime()
next_setting = obs.next_setting(target).datetime()
prev_rising = obs.previous_rising(target).datetime()
prev_setting = obs.previous_setting(target).datetime()
print(map(repr, [next_rising, next_setting, prev_rising, prev_setting]))
def run(self):
# Pegando as informações
self.get_info()
# Criando um Observatório
self.set_observer(self.longitude, self.latitude, self.elevation)
while True:
now_datetime = datetime.utcnow()
self.obs.date = ephem.date(now_datetime)
sun = ephem.Sun(self.obs)
moon = ephem.Moon(self.obs)
frac = moon.moon_phase
sun_alt = ephem.degrees(sun.alt)
moon_alt = ephem.degrees(moon.alt)
sun_elevation = "{:.2f}º".format(float(math.degrees(sun_alt)))
moon_elevation = "{:.2f}º".format(float(math.degrees(moon_alt)))
moon_phase = "{0:.2f}%".format(frac * 100)
self.signal_update_sun_moon.emit([sun_elevation, moon_elevation, moon_phase])
time.sleep(1)
def print_pyephem_vega_sirius_transit():
"""
To run:
python -c 'from astroplan.tests.test_observer import print_pyephem_vega_sirius_transit as f; f()'
"""
lat = '47:36:34.92'
lon = '122:19:59.16'
elevation = 0.0 * u.m
pressure = 0
time = Time('1990-01-01 12:00:00')
vega_coords = SkyCoord(279.23473479*u.degree, 38.78368896*u.degree)
sirius_coords = SkyCoord(101.28715533*u.degree, -16.71611586*u.degree)
obs = ephem.Observer()
obs.lat = lat
obs.lon = lon
obs.elevation = elevation
obs.date = time.datetime
obs.pressure = pressure
vega = ephem.FixedBody()
vega._ra = ephem.degrees(vega_coords.ra.radian)
vega._dec = ephem.degrees(vega_coords.dec.radian)
vega.compute(obs)
sirius = ephem.FixedBody()
sirius._ra = ephem.degrees(sirius_coords.ra.radian)
sirius._dec = ephem.degrees(sirius_coords.dec.radian)
sirius.compute(obs)
vega_next_transit = obs.next_transit(vega).datetime()
sirius_next_transit = obs.next_transit(sirius).datetime()
print(map(repr, [vega_next_transit, sirius_next_transit]))
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 _compute_elevations(self, date):
"""Compute the object and solar elevation across Earth using PyEphem"""
# Sun Pyephem object
sun = ephem.Sun()
result = [] # list containing radiant altitudes (or NaN if daylight)
for lat in self.latitudes:
for lon in self.longitudes:
# Create a PyEphem "Observer" object at the given lon/lat
observer = ephem.Observer()
observer.lat = ephem.degrees('%s' % lat)
observer.long = ephem.degrees('%s' % lon)
observer.date = date
# Compute target and solar elevation
self.target.compute(observer)
target_alt = np.degrees(self.target.alt)
sun.compute(observer)
sun_alt = np.degrees(sun.alt)
if sun_alt > -6 or target_alt < 0:
result.append(np.NaN)
else:
result.append(target_alt)
# Return the result as a matrix
return np.array(result).reshape(len(self.latitudes),
len(self.longitudes))
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 extract(self):
if not self.active:
return default
ret = default
## do some tests on the data
try:
if self.ra < 0.0 or self.ra >= 360.0:
ret.update({'ra': None})
else:
ret.update({'ra': ephem.degrees(str(self.ra))})
except:
ret.update({'ra': None})
try:
if self.dec < -90.0 or self.dec > 90.0:
ret.update({'dec': None})
else:
ret.update({'dec': ephem.degrees(str(self.dec))})
except:
ret.update({'dec': None})
if ret['dec'] is not None and ret['ra'] is not None:
np = ephem.Equatorial(ret['ra'],ret['dec'],epoch='2000')
else:
return ret
g = ephem.Galactic(np)
e = ephem.Ecliptic(np)
ret = {'galb': rad2deg*float(g.lat), 'gall': rad2deg*float(g.long), \
'ecb': rad2deg*float(e.lat), 'ecl': rad2deg*float(e.long), \
'ra': rad2deg*float(np.ra), 'dec': rad2deg*float(np.dec)}
return ret
def day_night(sdate, edate, alma):
datet = alma.date
alma.horizon = ephem.degrees(str('-20'))
obj = ephem.Sun()
alma.date = sdate
lst_start = alma.sidereal_time()
sun_set = alma.next_setting(obj)
alma.date = sun_set
alma.horizon = ephem.degrees(str('0'))
lst_dark = alma.sidereal_time()
alma.horizon = ephem.degrees(str('-20'))
alma.date = edate
lst_end = alma.sidereal_time()
sun_rise = alma.previous_rising(obj)
alma.date = sun_rise
alma.horizon = ephem.degrees(str('0'))
lst_dawn = alma.sidereal_time()
alma.date = datet
lst_start = np.rad2deg(lst_start) / 15.
lst_dark = np.rad2deg(lst_dark) / 15.
lst_end = np.rad2deg(lst_end) / 15.
lst_dawn = np.rad2deg(lst_dawn) / 15.
return pd.Series([lst_start, lst_dark, lst_end, lst_dawn],
index=['lst_start', 'lst_dusk', 'lst_end', 'lst_dawn'])
def ellipse(self):
# An approximation to the DECam field of view, suitable e.g. for plotting
semimajor_deg = ephem.degrees('1.08')
semiminor_deg = ephem.degrees('0.98')
center = (self.ra, self.dec)
rotation = 0
return Ellipse(center, 2*semimajor_deg, 2*semiminor_deg, rotation)
def hadec2altaz(obs, ha, dec):
"""Convert (ha, dec) to (alt, az)
Inputs, outputs same as radec2altaz(obs, ra, dec)
except replacing ra with ha
ha: hour angle in RADIANS, may use ephem.hours, degrees
"""
lat = obs.lat
x = np.cos(dec) * np.cos(ha)
y = np.cos(dec) * np.sin(ha)
z = np.sin(dec)
vec = np.array([x,y,z])
# TODO: don't keep regenerating this matrix
# Ideally we would calculate by hand the simplest possible transformation
# But I'm too lazy and it doesn't really matter
# Not important since I don't use this for actual observation
rotmat = np.array(
[[-1*np.sin(lat), 0., np.cos(lat)],
[0., -1., 0.],
[np.cos(lat), 0., np.sin(lat)]])
vec_rot = np.dot(rotmat, vec)
alt = np.arcsin(vec_rot[2])
az = np.arctan2(vec_rot[1], vec_rot[0])
if az < 0:
az = az + 2*np.pi
return (ephem.degrees(alt), ephem.degrees(az))
def _createObserver(self, elevation, latitude, longitude, horizon, temp, pressure):
self.long = ephem.degrees(str(longitude))
self.lat = ephem.degrees(str(latitude))
self.elevation = float(elevation)
self.horizon = str(horizon)
self.temp = float(temp) #temperature will be corrected by PLC later
self.pressure = float(pressure)
def get_schedule_by_priority(src_data, config):
N_src = np.shape(src_data)[0]
print "Using schedule by priority algorithm for %s sources" % N_src
src_data = np.column_stack((src_data, np.zeros(N_src, dtype=int)))
start_date_time, end_date_time = obsim.get_start_end_dates(config)
tz_offset = config['time_zone'] * ephem.hour
wait_time = config['priority_wait_time'] * ephem.second
loc = obsim.init_loc(config)
src = obsim.init_src()
# Initializing current position and time
curr_time = start_date_time
curr_tel_pos = [ ephem.degrees(str(config["telescope_azimuth"])), ephem.degrees(str(config["telescope_altitude"])) ]
slew_rate = [ config["slew_rate_az"], config["slew_rate_alt"] ]
schedule = []
while (curr_time < end_date_time):
schedule, status = get_next_src(src_data, N_src, src, loc, curr_time, tz_offset, curr_tel_pos, slew_rate, schedule)
if (status[0]):
src_data[status[1]][7] = 1
curr_time = status[2]
curr_tel_pos = [status[3], status[4]]
else:
from_time_local = ephem.Date(curr_time + tz_offset)
curr_time = ephem.Date(curr_time + wait_time)
if (curr_time > end_date_time):
curr_time = end_date_time
curr_time_local = ephem.date(curr_time + tz_offset)
time_diff = (curr_time_local - from_time_local)*24.*3600
schedule.append( [ 'Wait', str(from_time_local), str(curr_time_local), int(round(time_diff)), '0', '0' ] )
return schedule
def __init__(self, name, timezone=None, longitude=None, latitude=None,
elevation=None, pressure=None, temperature=None,
date=None, description=None):
super(Observer, self).__init__()
self.name = name
self.timezone = timezone
self.longitude = longitude
self.latitude = latitude
self.elevation = elevation
self.pressure = pressure
self.temperature = temperature
self.date = date
self.horizon = -1 * np.sqrt(2 * elevation / ephem.earth_radius)
if timezone is None:
# default to UTC
timezone = pytz.timezone('UTC')
self.tz_local = timezone
self.tz_utc = pytz.timezone('UTC')
self.site = self.get_site(date=date)
# used for sunset, sunrise calculations
self.horizon6 = -1.0 * ephem.degrees('06:00:00.0')
self.horizon12 = -1.0 * ephem.degrees('12:00:00.0')
self.horizon18 = -1.0 * ephem.degrees('18:00:00.0')
self.sun = ephem.Sun()
self.moon = ephem.Moon()
self.sun.compute(self.site)
self.moon.compute(self.site)
def calc_airmass(self, alt):
"""Compute airmass"""
if alt < ephem.degrees('03:00:00'):
alt = ephem.degrees('03:00:00')
sz = 1.0/np.sin(alt) - 1.0
xp = 1.0 + sz*(0.9981833 - sz*(0.002875 + 0.0008083*sz))
return xp
def secz(alt):
"""Compute airmass"""
if alt < E.degrees('03:00:00'):
alt = E.degrees('03:00:00')
sz = 1.0/np.sin(alt) - 1.0
xp = 1.0 + sz*(0.9981833 - sz*(0.002875 + 0.0008083*sz))
return xp
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 lbdeg2radec(l, b):
"""Takes galactic coords in degrees (floats), output ephem.Angle() ra/dec
"""
l_r = ephem.degrees(str(l))
b_r = ephem.degrees(str(b))
c = ephem.Equatorial(ephem.Galactic(l_r, b_r, epoch=ephem.J2000))
return c.ra, c.dec
def compute_chip(rockra, rockdec, expra, expdec):
deltara = 180/np.pi*ephem.degrees(rockra-expra).znorm # compute difference in degrees (normalized between -180, +180)
deltadec = 180/np.pi*ephem.degrees(rockdec-expdec).znorm # the 180/pi is because ephem.Angle objects are natively in radians
ccdname = 'None'
for k in ccdBounds.keys():
if deltara > ccdBounds[k][0] and deltara < ccdBounds[k][1] and deltadec > ccdBounds[k][2] and deltadec < ccdBounds[k][3]:
ccdname = k
return ccdname
def main():
# Try some SN fields:
C1 = ephem.readdb("C1,f,03:37:05.83,-27:06:41.8,23.0,2000")
C1.compute()
C1field = DECamField(C1.ra, C1.dec)
print C1field.ra, C1field.dec
print C1field.contains(C1.ra, C1.dec+ephem.degrees('0.979'))
print C1field.contains(ephem.degrees('04:00:00'),ephem.degrees('-30:00:00'))
def make_cat(infile):
df = pd.read_csv(infile)
# rename some columns:
df.rename(columns={'date_obs':'date', 'snobjid':'objid', 'snfake_id':'fakeid'}, inplace=True)
df['ra'] = df.apply(lambda row: hours(degrees(str(row['ra']))), axis=1)
df['dec'] = df.apply(lambda row: degrees(str(row['dec'])), axis=1)
df['date'] = df.apply(lambda row: toDateTime(row['date']), axis=1)
return df
def riseset(year, month, day, position):
thob = ephem.Observer()
thob.long = ephem.degrees("-119.1773417")
thob.lat = ephem.degrees("34.467028")
thob.elevation = 504.4
#thob.date = "2017/8/21"
#sun = ephem.Sun(thob)
a = []
t = range(0,1440) #np.array([datetime.datetime(2016,4,6,i,m,0) for i in range(24) for m in range(60)])
for d in [datetime.datetime(year,month,day,i,m,0) for i in range(24) for m in range(60)]:
thob.date = d
sun = ephem.Sun(thob) #put coordinate of star here
a.append(sun.alt + np.radians(0.25))
a = np.array(a)
t = np.array(t)
pl.title('The Altitude of the Sun')
pl.ylabel('Time in minutes',)
pl.xlabel('Altitude')
pl.plot(a, t, 'ro')#, xnew, ynew, '-')
pl.axvline(x=0, color = 'b',linestyle = 'dashdot')
pl.axvline(x=-0.20943951,color = 'b',linestyle = 'dashdot')
pl.axvline(x=-0.314159265, color = 'b',linestyle = 'dashdot')
inds, = np.where((a>-0.4) & (a<0.1))
pl.plot(a[inds],t[inds],'ko')
pl.show()
m = np.diff(a[inds])
rinds = np.where(m > 0)
risea = a[inds][rinds]
riset = t[inds][rinds]
risefunc = interpolate.interp1d(risea, riset)
risetime = risefunc(np.radians(position))
risehour = risetime//60
riseminute = risetime % 60
risesecond = int((risetime - int(risetime))*60)
sunrise = '%d:%d:%d' % (risehour, riseminute, risesecond)
sinds = np.where(m < 0)
seta = a[inds][sinds]
sett = t[inds][sinds]
setfunc = interpolate.interp1d(seta, sett)
settime = setfunc(np.radians(position))
sethour = settime//60
setminute = settime % 60
setsecond = int((settime - int(settime))*60)
sunset = '%d:%d:%d' % (sethour, setminute, setsecond)
return sunrise, sunset
def createVisibleSatsFile(observer, satSystem, listSat, predDates, elevation, azimuth, cutoff, verbose=False):
'''
createVisibleSatsFile writes info to a file
Parameters:
observer: info about the observation station and date
satSystem: used satellite system
listSat: list of satellites
predDates: contains the prediction dates
elevation, azimuth contain the angles (elevation only if greater than cutoff angle)
'''
filename = observer.name + '-' + satSystem.replace(',', '-') + '-%04d%02d%02d.txt' % (observer.getYMD())
if verbose:
print(' Creating visibility file: %s' % filename)
try:
fid = open(filename, 'w')
# write the observer info out
fid.write('Observer: %s\n' % observer.name)
fid.write(' lat: %s\n' % ephem.degrees(observer.lat))
fid.write(' lon: %s\n' % ephem.degrees(observer.lon))
fid.write(' date: %04d/%02d/%02d' % observer.getYMD())
fid.write(' cutoff: %2d\n\n' % cutoff)
# write the sat IDs on first line
satLine1 = ''
satLine2 = ''
for j, sat in enumerate(listSat):
if len(sat.name) < 11:
satLine1 += ' %10s' % sat.name
else:
satLine1 += ' %10s' % sat.name[:10]
endChar = min(20, len(sat.name))
satLine2 += ' %10s' % sat.name[10:endChar]
fid.write(' |#Vis|%s' % satLine1)
fid.write('\n')
if len(satLine2) > 0:
fid.write(' %s' % satLine2)
fid.write('\n')
fid.write('\n')
# print the number of visible SVs and their elev/azim
for i, predDate in enumerate(predDates):
fid.write('%02d:%02d' % (predDate.hour, predDate.minute))
# number of visible satellites
fid.write(' | %2d |' % np.count_nonzero(~np.isnan(elevation[i, :])))
for j, sat in enumerate(listSat):
if math.isnan(elevation[i, j]):
fid.write(' ---- -----')
else:
fid.write(' %4.1f %5.1f' % (elevation[i, j], azimuth[i, j]))
fid.write('\n')
# close the file
fid.close()
except IOError:
print(' Access to file %s failed' % filename)
def __init__(self, latitude, longitude, elevation, horizon, output_base):
self.proc = None
self.frequency = None
self.observer = ephem.Observer()
self.observer.lat = ephem.degrees(latitude)
self.observer.long = ephem.degrees(longitude)
self.observer.elevation = float(elevation)
self.observer.horizon = ephem.degrees(horizon)
self.output_base = output_base
def extend(target, year='Y4', chisq_cut=10, teff_min=0.3):
'''
Identifies matches to the target object in the SE catalog from the given year and returns them as a dataframe.
:param target: dataframe of observations
:param year: DES observing year to be searched, e.g. 'Y4'
:param chisq_cut: delta_chisq cut for matches, default=10
:param teff_min: minimum t_eff of exposures to consider
:return: dataframe of matches
'''
matched_good = pd.DataFrame()
orbit = getOrbit(target)
search_exps = search_exposures(target, orbit, year=year, teff_min=teff_min)
if len(search_exps):
print 'Number of exposures to be searched: ', len(search_exps)
print (search_exps[['expnum', 'date','band','ccd','nite','t_eff','fwhm_asec']]).head(20)
matched_obs = find_observations(search_exps, target, orbit, year=year, nsigma=5)
else:
matched_obs = []
print 'No exposures to search'
if len(matched_obs):
matched_obs['ccd'] = matched_obs.apply(lambda row: get_ccd(row, search_exps), axis=1)
matched_obs['ccd'] = matched_obs['ccd'].astype(int)
matched_good = matched_obs[matched_obs['delta_chisq'] < chisq_cut]
print 'Number of good matches: ', len(matched_good)
if len(matched_good) > 0:
matched_good['date'] = matched_good.apply(lambda row: str(ephem.date(row['date'])), axis=1)
matched_good['ra'] = matched_good.apply(lambda row: str(ephem.hours(np.radians(row['ra']))), axis=1)
matched_good['dec'] = matched_good.apply(lambda row: str(ephem.degrees(np.radians(row['dec']))), axis=1)
try:
matched_good['mag'] = matched_good.apply(lambda row: round(mag_calib(row), 2), axis=1)
except TypeError as e:
print e
return matched_good
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
def above_horizon(target,
observer,
horizon=20.0,
duration=0.0):
"""Check target visibility.
Utility function to calculate ephem horizontal coordinates
"""
# use local copies so you do not overwrite target time attribute
horizon = ephem.degrees(str(horizon))
# must be celestial target (ra, dec)
# check that target is visible at start of track
start_ = timestamp2datetime(time.time())
[azim, elev] = _horizontal_coordinates(target,
observer,
start_)
user_logger.trace(
"TRACE: target at start (az, el)= ({}, {})".format(azim, elev)
)
if not elev > horizon:
return False
# check that target will be visible at end of track
if duration:
end_ = timestamp2datetime(time.time() + duration)
[azim, elev] = _horizontal_coordinates(target,
observer,
end_)
user_logger.trace(
"TRACE: target at end (az, el)= ({}, {})".format(azim, elev)
)
return elev > horizon
return True
def getBearingFromPoint(ra1, dec1, ra2, dec2, ): """ Given ephem.Angle instances for two sets of RA/dec values, compute the initial bearing and distance of the second point from the first. From: http://www.movable-type.co.uk/scripts/latlong.html """ # Distance (via PyEphem) distance = ephem.separation((ra1,dec1), (ra2,dec2)) # Bearing bearing = math.atan2(math.sin(ra2-ra1)*math.cos(dec2), math.cos(dec1)*math.sin(dec2)-math.sin(dec1)*math.cos(dec2)*math.cos(ra2-ra1)) return ephem.degrees(bearing), ephem.degrees(distance)
def test_observer(self):
"""Test the ephem.Observer portion of an LWAStation."""
lwa1 = stations.lwa1
jov = ephem.Jupiter()
lwa1.date = '2013/7/10 22:07:07'
lwa1.compute(jov)
# RA/Dec
self.assertAlmostEqual(jov.ra, ephem.hours('6:14:41.01'), 6)
self.assertAlmostEqual(jov.dec, ephem.degrees('23:11:49.1'), 6)
#Az/Alt
self.assertAlmostEqual(jov.az, ephem.degrees('274:40:27.7'), 6)
self.assertAlmostEqual(jov.alt, ephem.degrees('37:24:10.5'), 6)
def doSteps(self, delta):
#Distribute steps on
#delta is in radians. Calculate actual steps
steps = delta / self.minMotorStep + self.stepsRest
Isteps = round(steps)
#acumultate the fractional part to the next step
self.stepsRest = steps - Isteps
if self.log:
motorBeta = float(self.motorBeta) * self.minMotorStep
self.saveDebug(self.stepTarget - self.motorBeta, motorBeta)
#self.saveDebug(self.deltavFine,motorBeta)
#self.saveDebug(self.stepTarget,motorBeta)
#calculate direction of motion
'''Now is done in setPWMSpeed() '''
#calculate target steps
self.stepTarget = self.stepTarget + Isteps
self.deltavFine = ephem.degrees(self.beta -
self.motorBeta * self.minMotorStep)
self.setPWMspeed(self.v + self.deltavFine)
#self.setPWMspeed(self.v)
'''
def __init__(self, site_info, date):
"""Computes an astronomical almanac for a given site and date"""
self.site_info = site_info
self.site = site_info.observer()
self.localdate = date
self.ltz = timezone(self.site_info.timezone)
self.utc = timezone('UTC')
self.date = self.local2utc(date)
self.site.date = self.date
self.horizon = self.site.horizon
self.horizon12 = -1.0 * E.degrees('12:00:00.0')
self.horizon18 = -1.0 * E.degrees('18:00:00.0')
self.sun = E.Sun()
self.moon = E.Moon()
self.sun.compute(self.site)
self.moon.compute(self.site)
def gearInit(self):
self.socketHUBCmd.send('@getGear')
reply = self.socketHUBCmd.recv()
print(reply)
reply = json.loads(reply)
self.pointError = ephem.degrees(str(reply['pointError']))
print(self.pointError)
def above_horizon(target, observer, horizon=20.0, duration=0.0):
"""Check target visibility."""
# use local copies so you do not overwrite target time attribute
horizon = ephem.degrees(str(horizon))
if type(target) is not ephem.FixedBody:
# anticipate katpoint special target for AzEl targets
if 'alt' not in vars(target):
raise RuntimeError('Unknown target type, exiting...')
# 'StationaryBody' objects do not have RaDec coordinates
# check pointing altitude is above minimum elevation limit
return bool(target.alt >= horizon)
# must be celestial target (ra, dec)
# check that target is visible at start of track
start_ = timestamp2datetime(time.time())
[azim, elev] = __horizontal_coordinates__(target, observer, start_)
user_logger.trace("TRACE: target at start (az, el)= ({}, {})".format(
azim, elev))
if not elev > horizon:
return False
# check that target will be visible at end of track
if duration:
end_ = timestamp2datetime(time.time() + duration)
[azim, elev] = __horizontal_coordinates__(target, observer, end_)
user_logger.trace("TRACE: target at end (az, el)= ({}, {})".format(
azim, elev))
return elev > horizon
return True
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 make_fixedBodies(self):
for target in self.target_list:
target['fixedbody'] = ephem.FixedBody()
target['fixedbody']._ra = ephem.hours(target['ra'])
target['fixedbody']._dec = ephem.degrees(target['dec'])
# target['fixedbody']._epoch = 2000.0
target['fixedbody'].compute(self.obs)
def arduinoToStellarium(pAzimuth, pAltitude):
s = str(
home.radec_of(float(ephem.degrees(pAzimuth)),
float(ephem.degrees(pAltitude))))
home.date = datetime.datetime.utcnow()
pos = home.radec_of(float(ephem.degrees(str(pAzimuth))),
float(ephem.degrees(str(pAltitude))))
if args.verbose:
print('arduinoToStellarium Az/pAltitude: ' + str(pAzimuth) + ' / ' +
str(pAltitude))
print('arduinoToStellarium Ra/Dec: ' + str(pos[0]) + ' / ' +
str(pos[1]))
#print(float(pos[0])*180/M_PI)
#print(float(pos[1])*180/M_PI)
return angleToStellarium(pos[0]), angleToStellarium(pos[1])
def solve_coordinates(self, index):
self.observer = Observer()
(lon, lat, ele) = self.get_location()
self.observer.lon = degrees(lon)
self.observer.lat = degrees(lat)
self.observer.elevation = ele
self.observer.date = now()
self.observer.epoch = now()
for i in range(index):
self.pyephem_routine(self.show_satellite_list[i],
self.tle_first_line_list[i],
self.tle_second_line_list[i])
def genStars(star_table):
"""pyephem_objs = genStars(star_table)
given a star_table returned by parseCodex (or initStarTable) returns
a list of pyephem objects for every object in the table
Inputs star_table - astropy Table that must have the RA and Dec in
sexigresimal format with each column for each part of the
coordinates separate
"""
stars = []
if 'name' in star_table.colnames:
for i in range(0, len(star_table['name'])):
star = ephem.FixedBody()
star.name = star_table['name'][i]
star._ra = ephem.hours(
str(":".join([
star_table["RA hr"][i], star_table["RA min"][i],
star_table["RA sec"][i]
])))
star._dec = ephem.degrees(
str(":".join([
star_table["Dec deg"][i], star_table["Dec min"][i],
star_table["Dec sec"][i]
])))
stars.append(star)
return stars
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 get_pyephem_instance_for_type(target):
"""
Constructs a pyephem body corresponding to the proper object type
in order to perform positional calculations for the target
:returns: FixedBody or EllipticalBody
:raises Exception: When a target type other than sidereal or non-sidereal is supplied
"""
if target.type == target.NON_SIDEREAL:
body = ephem.EllipticalBody()
body._inc = ephem.degrees(
target.inclination) if target.inclination else 0
body._Om = target.lng_asc_node if target.lng_asc_node else 0
body._om = target.arg_of_perihelion if target.arg_of_perihelion else 0
body._a = target.semimajor_axis if target.semimajor_axis else 0
body._M = target.mean_anomaly if target.mean_anomaly else 0
if target.ephemeris_epoch:
epoch_M = Time(target.ephemeris_epoch, format='jd')
epoch_M.format = 'datetime'
body._epoch_M = ephem.Date(epoch_M.value)
else:
body._epoch_M = ephem.Date(DEFAULT_VALUES['epoch'])
body._epoch = target.epoch if target.epoch else ephem.Date(
DEFAULT_VALUES['epoch'])
body._e = target.eccentricity if target.eccentricity else 0
return body
else:
raise Exception(
"Object type is unsupported for visibility calculations")
def test_attributes(self):
"""Test aipy.phs.RadioFixedBody attributes"""
epoch = ephem.B1950
s = a.phs.RadioFixedBody('0:00',
'0:00',
mfreq=.200,
name='src1',
epoch=epoch,
ionref=(.0, .0),
srcshape=(.003, .005, .6))
self.assertEqual(s._ra, ephem.hours('0:00'))
self.assertEqual(s._dec, ephem.degrees('0:00'))
self.assertEqual(s.mfreq, .200)
self.assertEqual(s.src_name, 'src1')
self.assertAlmostEqual(s._epoch, epoch, 3)
self.assertEqual(s.ionref, [.0, .0])
self.assertEqual(s.srcshape, [.003, .005, .6])
self.assertRaises(RuntimeError, lambda: s.ra)
self.assertRaises(RuntimeError, lambda: s.dec)
self.assertRaises(AttributeError, lambda: s.map)
o = a.phs.ArrayLocation(('0:00', '0:00'))
o.set_ephemtime(epoch)
s.compute(o)
self.assertEqual(len(s.get_crds('eq', ncrd=2)), 2)
self.assertEqual(len(s.get_crds('top', ncrd=2)), 2)
self.assertEqual(len(s.get_crds('eq', ncrd=3)), 3)
self.assertEqual(len(s.get_crds('top', ncrd=3)), 3)
self.assertEqual(s.map.shape, (3, 3))
def observation_info(self, observer):
p_object = self.fixed_body
p_object.compute(observer)
up = True if ephem.degrees(p_object.alt) > 0 else False
info = {
'alt': str(p_object.alt),
'az': str(p_object.az),
'up': up,
'neverup': p_object.neverup
}
try:
next_rising = observer.next_rising(p_object)
next_setting = observer.next_setting(p_object)
info.update({
'rise':
timezone.make_aware(next_rising.datetime(), pytz.UTC)
if next_rising else None,
'set':
timezone.make_aware(next_setting.datetime(), pytz.UTC)
if next_setting else None
})
except ephem.AlwaysUpError:
info.update({'alwaysup': True})
except:
pass
return info
def parseStarlist(starlist):
""" Parse a scriptobs-compatible starlist for the scheduler.
names, star_table, lines, stars = parseStarlist(starlist)
starlist - a filename
names - a list of stars in the starlist
star_table - a numpy array
lines - a list of strings that can be used for scriptobs input
stars - a list of pyEphem objects
"""
names = []
lines = []
stars = []
star_table = []
try:
f = open(starlist, 'r')
except IOError:
apflog("Warning: Could not open %s. No target can be selected." %
starlist,
echo=True)
return None
else:
for line in f:
if not re.search("\A\#", line):
ls = line.split()
names.append(ls[0])
row = []
# RA value in radians
row.append(getRARad(ls[1], ls[2], ls[3]))
# Dec value in radians
row.append(getDECRad(ls[4], ls[5], ls[6]))
# PM RA
row.append(float(ls[8].split('=')[-1]))
# PM Dec
row.append(float(ls[9].split('=')[-1]))
# V mag
row.append(float(ls[10].split('=')[-1]))
# Exposure time
row.append(float(ls[11].split('=')[-1]))
# Desired Counts
row.append(float(ls[16].split('=')[-1]))
# Filler not used here
row.append(0.)
row.append(0.)
# Number of exposures
row.append(int(ls[19].split('=')[-1]))
star_table.append(row)
# Save the scriptobs line for later
lines.append(line)
# Generate a pyEphem object for this target
star = ephem.FixedBody()
star._ra = ephem.hours(":".join([ls[1], ls[2], ls[3]]))
star._dec = ephem.degrees(":".join([ls[4], ls[5], ls[6]]))
stars.append(star)
return names, np.array(star_table), lines, stars
def basic_skysurvey_plot_setup(from_plane=ephem.degrees('0')):
# # EmulateApJ columnwidth=245.26 pts
# fig_width_pt = 246.0
# inches_per_pt = 1.0 / 72.27
# golden_mean = (sqrt(5.) - 1.0) / 2.0
# fig_width = fig_width_pt * inches_per_pt
# fig_height = fig_width * golden_mean * 1.5
# fig_size = [fig_width, fig_height]
fig = plt.figure()
ax = fig.add_subplot(111) # , aspect="equal")
handles = [
] # this handles the creation of the legend properly at the end of plotting
labels = []
handles, labels = plot_galactic_plane(handles, labels)
# handles, labels = plot_ecliptic_plane(handles, labels)
handles, labels = plot_invariable_plane(handles, labels, from_plane)
fontP = FontProperties()
fontP.set_size('small') # make the fonts smaller
plt.xlabel('RA (deg)')
plt.ylabel('Declination (deg)')
plt.grid(True, which='both')
# plot_fanciness.remove_border(ax)
return handles, labels, ax, fontP
def main():
day_local = '2020/8/03 21:00:00'
moon = ephem.Moon()
wild_horse = ephem.Observer()
wild_horse.date = day_local
wild_horse.lat = ephem.degrees('46.968359')
wild_horse.lon = ephem.degrees('-119.966648')
wild_horse.elevation = 330
output(wild_horse,
moon,
wild_horse.date,
inc=0.5,
iterations=120,
time_offset=7)
def is_observable(self, ra, dec, restrictions={}):
result = False
# Create the object, Moon and Sun
obj = ephem.readdb(
"Object,f|S,%s,%s,0.0,2000.0" %
(ephem.hours(deg2rad(ra)), ephem.degrees(deg2rad(dec))))
moon = ephem.Moon()
sun = ephem.Sun()
date = ephem.now()
print ra, dec, restrictions
# Simulate the next 24 hours
for t in (0.01 * x + date for x in xrange(0, 100)):
self.obs.date = t
obj.compute(self.obs)
moon.compute(self.obs)
sun.compute(self.obs)
# Is it night time?
if rad2deg(sun.alt) < -10:
# Now let's check the restrictions, if any
if (rad2deg(obj.alt) >= restrictions.get('min_altitude', 0.0)
and rad2deg(ephem.separation(obj, moon)) >=
restrictions.get('min_moon_distance', 0.0)
and moon.alt <= restrictions.get(
'max_moon_altitude', 90.0)):
result = True
break
return result
def equatorial(data):
"""
Returns the J2000 right ascension and declination
Taken from keyed data or computed from from ecliptic or galactic
coordinates, whatever is given.
@return: hours (float), degrees (float)
"""
ra = get(data, 'RAJ')
if ra != '':
decl = get(data, 'DECJ')
ra = E.hours(data['RAJ']) # E.Angle(data['RAJ'], A.u.hourangle)
decl = E.degrees(data['DECJ']) # E.Angle(data['DECJ'], A.u.deg)
return ra, decl
else:
elong = get(data, 'ELONG')
module_logger.debug("equatorial: elong is %s", elong)
if elong != '':
elat = float(get(data, 'ELAT'))
try:
mjd = float(get(data, 'POSEPOCH'))
except (IndexError, ValueError):
try:
mjd = float(get(data, 'PEPOCH'))
except (IndexError, ValueError):
# default to J2000
mjd = 51544
ra, decl = A.ecliptic_to_J2000(elong, elat, mjd)
return ra * 12 / math.pi, decl * 180 / math.pi
else:
# try galactic coordinates
return "", "" # for now
return None
def searchPass(aoi, satInfo, startdate, enddate, maxOffNadir):
sat = satInfo.sat
osat = satInfo.osat
orbitOffset = satInfo.orbitOffset
aoi.date = startdate
sat.compute(aoi)
passes = []
i = 0
while True:
(_, _, mat, _, st, _) = aoi.next_pass(sat)
if mat > enddate:
break
# Move sat to Max Alt Time
aoi.date = mat
sat.compute(aoi)
# Compute off-nadir angle
alt = sat.alt
h = sat.elevation / 1000
offNadir = ephem.degrees(asin(R / (R + h) * cos(alt)))
eclipsed = sat.eclipsed
if offNadir < maxOffNadir and not eclipsed:
i = i + 1
orbit = osat.get_orbit_number(jday2datetime(mat)) + orbitOffset
apass = Pass(sat, aoi, orbit, offNadir)
passes.append(apass)
# Move sat to end of pass + 1 sec.
aoi.date = st + ephem.second
sat.compute(aoi)
return passes
def isSafelyUp(obj):
exam_venue.date = ephem.now()
obj.compute(exam_venue)
# if not(obj.alt > ephem.degrees(MIN_ALTITUDE)) :
# print obj.name
# print obj.alt
return obj.alt > ephem.degrees(MIN_ALTITUDE)
def calcOrbit(self):
#converts every coordinate into correct units
#time0 = time.time()
mag = max([x.mag for x in self.dets])
errs = 0.1
if mag <= 21:
errs = 0.1
else:
errs = 0.1 + (mag - 21.0) / 10.0
ralist = [ephem.hours(np.deg2rad(det.ra)) for det in self.dets]
#time1 = time.time()
declist = [ephem.degrees(np.deg2rad(det.dec)) for det in self.dets]
#time2 = time.time()
datelist = [
ephem.date((Time(det.mjd, format='mjd')).datetime)
for det in self.dets
]
#time3 = time.time()
orbit = Orbit(dates=datelist,
ra=ralist,
dec=declist,
obscode=np.ones(len(self.dets), dtype=int) * 807,
err=errs)
self.orbit = orbit
#time4 = time.time()
#print('time1: ' + str(time1-time0))
#print('time2: ' + str(time2-time1))
# print('time3: ' + str(time3-time2))
#print('time4: ' + str(time4-time3))
orbit.get_elements()
self.chiSq = orbit.chisq
self.elements, self.errs = orbit.get_elements()
return self.elements, self.errs
def updateMoonInfo(self):
"""
"""
self.moon.compute(self.site)
self.moon_alt = self.moon.alt
self.moon_dms = np.degrees(ephem.degrees(self.moon_alt))
self.moonphase = self.moon.moon_phase
def vis_strip():
site = salt_site()
cat = hr_catalog(site)
good = []
upper = ephem.degrees('65.0')
lower = ephem.degrees('43.0')
for key, star in cat.items():
lst = site.sidereal_time()
ha = ephem.hours(lst - star.ra)
if star.alt < upper and star.alt > lower:
good.append(key)
good.sort(lambda x, y: cmp(cat[x].mag, cat[y].mag))
return good
def planetsGHA(date): # used in planetstab(m)
# this function returns a tuple of strings with ephemerids in the format used by the nautical almanac.
# following are objects and their values:
#Aries gha
#Venus gha dec
#Mars gha dec
#Jupiter gha dec
#Saturn gha dec
obs = ephem.Observer()
obs.date = date
#Aries, First Point of
deg = ephem.degrees(obs.sidereal_time()).norm
ghaa = nadeg(deg)
#Venus
ephem_venus.compute(date, epoch=date)
deg = ephem.degrees(obs.sidereal_time() - ephem_venus.g_ra).norm
ghav = nadeg(deg)
degv = ephem_venus.g_dec
decv = nadeg(degv, 2)
#Mars
ephem_mars.compute(date, epoch=date)
deg = ephem.degrees(obs.sidereal_time() - ephem_mars.g_ra).norm
ghamars = nadeg(deg)
degmars = ephem_mars.g_dec
decmars = nadeg(degmars, 2)
#Jupiter
ephem_jupiter.compute(date, epoch=date)
deg = ephem.degrees(obs.sidereal_time() - ephem_jupiter.g_ra).norm
ghaj = nadeg(deg)
degj = ephem_jupiter.g_dec
decj = nadeg(degj, 2)
#Saturn
ephem_saturn.compute(date, epoch=date)
deg = ephem.degrees(obs.sidereal_time() - ephem_saturn.g_ra).norm
ghasat = nadeg(deg)
degsat = ephem_saturn.g_dec
decsat = nadeg(degsat, 2)
# degv, degmars, degj, degsat have been added for the planetstab function
return ghaa, ghav, decv, ghamars, decmars, ghaj, decj, ghasat, decsat, degv, degmars, degj, degsat
def radecFromStr(txt):
"""
Takes a string that contains ra in decimal degrees or in hh:mm:ss.s and dec in decimal degrees or dd:mm:ss.s
returns (ra, dec) in decimal degrees
"""
def check_str(text, rem_char=None):
if not isinstance(rem_char, str):
raise Exception("rem_char argument must be a string")
reps = {}
for elmt in rem_char:
reps.update({elmt: ""})
text = replace_multi(text, reps)
return text
def replace_multi(text, reps):
"""
Return the string obtained by replacing the leftmost non-overlapping occurrences of pattern in string by the replacement repl.
"""
rep = dict((re.escape(k).lower(), v) for k, v in reps.iteritems())
pattern = re.compile("|".join(rep.keys()), re.IGNORECASE)
return pattern.sub(lambda m: rep[re.escape(m.group(0)).lower()], text)
deli = check_str(txt, rem_char="+-.,0123456789abcdefghijklmnopqrstuvwxyz")
if len(deli) == 1:
ra, dec = txt.split(deli)
elif len(deli) < 5:
raise ValueError("Could not understand ra-dec formating")
elif len(deli) == 5 or (deli[0] == deli[1] and deli[3] == deli[4]):
ra = txt[:txt.find(deli[2],
txt.find(deli[0],
txt.find(deli[0]) + 1) + 1)].strip()
txt = txt.replace(ra, "")
dec = txt[txt.find(deli[2]) + 1:].strip()
else:
raise ValueError("Could not understand ra-dec formating")
try:
ra = E.degrees(float(ra)) # test si decmal degrees
except:
try:
ra = Angle(ra + 'h').deg # hourangle
except:
raise ValueError("Could not understand ra-dec formating")
try:
dec = E.degrees(dec) # decimal degrees or hms
except:
raise ValueError("Could not understand ra-dec formating")
return ra, dec
