def CalcAlt(conf, eqcoords, timebins):
Altitudes = []
hmsSystem = sidereal.MixedUnits((60, 60))
RA, DEC = eqcoords
if conf.tabobdec:
RA = float(RA)
DEC = float(DEC)
else:
RA = ToSingleValue(RA) * 15 #RA in degrees
DEC = ToSingleValue(DEC)
calc_date = datetime.strptime(date, "%Y-%m-%d %H:%M:%S")
year = calc_date.year
month = calc_date.month
day = calc_date.day
for time in timebins:
hour, minute, second = hmsSystem.singleToMix(time)
curtime = datetime(year, month, day, hour, minute, int(second))
Gst = sidereal.SiderealTime.fromDatetime(curtime) #FIXME
Lst = Gst.lst(math.radians(conf.longitude))
Lst = Lst.hours * 15 #local siderial time - in degrees
Hourangle = red_to_pos(Lst - RA)
RADec = sidereal.RADec(math.radians(RA), math.radians(DEC))
AltAz = RADec.altAz(math.radians(Hourangle * 15.0),
math.radians(conf.latitude))
Altitudes.append(math.degrees(AltAz.alt))
return Altitudes
def checkRADec(rawRADec):
"""Check and convert a pair of equatorial coordinates.
[ rawRADec is a string ->
if rawRADec is a valid set of equatorial coordinates ->
return those coordinates as a sidereal.RADec instance
else ->
sys.stderr +:= error message
stop execution ]
"""
#-- 1 --
# [ if rawRADec contains either a '+' or a '-' ->
# m := a re.match instance describing the first matching
# character
# else ->
# sys.stderr +:= error message
# stop execution ]
m = SIGN_PAT.search(rawRADec)
if m is None:
usage("Equatorial coordinates must be separated by " "'+' or '-'.")
#-- 2 --
# [ rawRA := rawRADec up to the match described by m
# sign := characters matched by m
# rawDec := rawRADec past the match described by m ]
rawRA = rawRADec[:m.start()]
sign = m.group()
rawDec = rawRADec[m.end():]
#-- 3 --
# [ if rawRA is a valid hours expression ->
# ra := rawRA as radians
# else ->
# sys.stderr +:= error message
# stop execution ]
try:
raHours = sidereal.parseHours(rawRA)
ra = sidereal.hoursToRadians(raHours)
except SyntaxError as detail:
usage("Right ascension '%s' should have the form "
"'NNh[NNm[NN.NNNs]]'." % rawRA)
#-- 4 --
# [ if rawDec is a valid angle expression ->
# absDec := that angle in radians
# sys.stderr +:= error message
# stop execution ]
try:
absDec = sidereal.parseAngle(rawDec)
except SyntaxError as detail:
usage("Right ascension '%s' should have the form "
"'NNd[NNm[NN.NNNs]]'." % rawDec)
#-- 5 --
if sign == '-': dec = -absDec
else: dec = absDec
#-- 6 --
return sidereal.RADec(ra, dec)
def getAzAlt(self, Ra, Dec):
RaDec = sidereal.RADec(Ra.r, Dec.r)
AltAz = RaDec.altAz(RaDec.hourAngle(self.sysTime, self.Lon.r),
self.Lat.r)
Az = angles.Angle(r=AltAz.az)
Alt = angles.Angle(r=AltAz.alt)
return [Az, Alt]
def CalcAlt(self, ev):
if self.conf.is_utc:
curtime = datetime.now()
else:
curtime = datetime.utcnow()
Gst = sidereal.SiderealTime.fromDatetime(curtime)
Lst = Gst.lst(math.radians(self.conf.longitude))
Lst = Lst.hours * 15 #local siderial time - in degrees
hourangle = red_to_pos(Lst - ev.RA)
RADec = sidereal.RADec(math.radians(ev.RA), math.radians(ev.DEC))
AltAz = RADec.altAz(math.radians(hourangle * 15.0),
math.radians(self.conf.latitude))
return math.degrees(AltAz.alt)
plt.xlim([binned.index.min(), binned.index.max()])
plt.grid(axis='x')
ax1.xaxis.set_major_formatter(plt.NullFormatter())
ax1.fill_between(binned.index, 0, binned.counts, alpha=.3, color='blue')
ax1.spines["top"].set_visible(False)
ax1.spines["right"].set_visible(False)
# Plot radiant altitude
if show_radiant_altitude:
JDs = map(utils.toJD, rad_pos.keys())
pos = np.deg2rad(rad_pos.values()).tolist()
retrieve = interpolate.interp1d(JDs, pos, axis=0)
ax1b = ax1.twinx()
for utc in utils.perdelta(min(dt), max(dt), timedelta(minutes=60)):
RA, Dec = retrieve(utils.toJD(utc))
equ_coord = sidereal.RADec(RA, Dec)
h = equ_coord.hourAngle(utc, lon)
horiz_coord = equ_coord.altAz(h, lat)
ax1b.set_ylabel('Radiant elevation [$\degree$]',
size=14,
style='italic',
color='green')
ax1b.scatter(utc,
np.rad2deg(horiz_coord.alt),
marker='.',
color='green')
ax1.autoscale(True, axis='x', tight=True)
ax2 = plt.subplot(2, 1, 2)
ax2.spines["top"].set_visible(False)
ax2.spines["right"].set_visible(False)