def angsep(self, other):
"""
Calculate the Great Circle Distance from other.
@param other: position to calculate distance from.
@type other: L{Position}
@returns: The distance from this point to L{other}.
@rtype: L{Coord} in degress (convertable, as this is a Coord).
"""
return Coord.fromR(CoordUtil.gcdist(self.R, other.R)).toD()
def angsep(self, other):
"""
Calculate the Great Circle Distance from other.
@param other: position to calculate distance from.
@type other: L{Position}
@returns: The distance from this point to L{other}.
@rtype: L{Coord} in degress (convertable, as this is a Coord).
"""
return Coord.fromR(CoordUtil.gcdist(self.R, other.R)).toD()
def altAzToRaDec(altAz, latitude, lst):
altR = CoordUtil.coordToR(altAz.alt)
latR = CoordUtil.coordToR(latitude)
azR = CoordUtil.coordToR(altAz.az)
decR, haR = CoordUtil.coordRotate(altR, latR, azR)
ra = CoordUtil.haToRa(haR, lst)
return Position.fromRaDec(CoordUtil.makeValid0to360(ra), CoordUtil.makeValid180to180(decR))
def raDecToAltAz(raDec, latitude, lst):
decR = CoordUtil.coordToR(raDec.dec)
latR = CoordUtil.coordToR(latitude)
ha = CoordUtil.raToHa(raDec.ra, lst)
haR = CoordUtil.coordToR(ha)
altR, azR = CoordUtil.coordRotate(decR, latR, haR)
return Position.fromAltAz(
Coord.fromR(CoordUtil.makeValid180to180(altR)),
Coord.fromR(CoordUtil.makeValid0to360(azR)))
def raDecToAltAz(raDec, latitude, lst):
decR = CoordUtil.coordToR(raDec.dec)
latR = CoordUtil.coordToR(latitude)
ha = CoordUtil.raToHa(raDec.ra, lst)
haR = CoordUtil.coordToR(ha)
altR, azR = CoordUtil.coordRotate(decR, latR, haR)
return Position.fromAltAz(
Coord.fromR(CoordUtil.makeValid180to180(altR)),
Coord.fromR(CoordUtil.makeValid0to360(azR)))
def solve_dome_azimuth(self, telescope_pos, lst, nloops=10):
# Find the altitude and azimuth of the current pointing
# This should be valid in either hemisphere
pos = Position.raDecToAltAz(telescope_pos, self.site_latitude, lst)
telaz, telalt, ha = pos.az.R, pos.alt.R, CoordUtil.raToHa(
telescope_pos.ra, lst).R
# Find the reference point on the optical axis in dome coordinates
# z: vertical
# y: north - south
# x: east - west
# theta: altitude of the polar axis from the horizontal plane
# phi: rotation of dec axis about polar axis
# Meaning of x and y compared to sky depends on the hemisphere!
# z: always + up
# y: always + toward N for +lat or S for -lat
# x: maintains right-handed coordinate system with z and y
# thus x is + to E for +lat and to W for -lat
# theta: always positive from the horizontal plane to the pole
# phi: rotation about polar axis
# and is +90 for a horizontal axis with OTA toward +x
# and is 0 for OTA over mount with dec axis counterweight down
# and is -90 for a horizontal axis with OTA toward -x
# We have a German equatorial and the origin changes with ha
# Assign phi based on an assumption about the basis derived from the ha
phi = ha
# Assign theta
theta = abs(self.site_latitude.R)
# Find the dome coordinates of the OTA reference point for a German equatorial
# This works in either hemisphere
x0 = self.mount_dec_length * sin(phi)
y0 = -self.mount_dec_length * cos(phi) * sin(
theta) + self.mount_dec_offset
z0 = self.mount_dec_length * cos(phi) * cos(
theta) + self.mount_dec_height
# (x,y,z) is on the optical axis
# Iterate to make this point also lie on the dome surface
# Begin iteration assuming the zero point is at the center of the dome
# Telescope azimuth is measured from the direction to the pole
d = 0.
r = self.dome_radius
if self.site_latitude.R <= 0.:
telaz2 = telaz - pi
# between (0, 2pi):
if telaz2 > 2 * pi:
telaz2 -= 2 * pi
elif telaz2 < 0:
telaz2 += 2 * pi
telalt2 = telalt
# Iterate for convergence
n = 0
while n < nloops:
d -= r - self.dome_radius
rp = self.dome_radius + d
x = x0 + rp * cos(telalt2) * sin(telaz2)
y = y0 + rp * cos(telalt2) * cos(telaz2)
z = z0 + rp * sin(telalt2)
r = sqrt(x * x + y * y + z * z)
# Repeat the calculation correcting the assumed OTA path length each time
# This converges quickly so just do a few loops and assume it is ok
# print "n, r, rp: ", n, r, rp
n += 1
# Use (x,y,0) from the interation to find the azimuth of the dome
# Azimuth is N (0), E (90), S (180), W (270) in both hemispheres
# However x and y are different in the hemispheres so we fix that here
zeta = atan2(x, y)
if (zeta > -2. * pi) and (zeta < 2. * pi):
if self.site_latitude.R <= 0.:
zeta += pi
else:
zeta = telaz
if zeta < 0:
zeta = zeta + 2 * pi
elif zeta > 2 * pi:
zeta - 2 * pi
return zeta * 180 / pi
def haToRa(self, ha):
return CoordUtil.raToHa(ha, self.LST_inRads())
def raToHa(self, ra):
return CoordUtil.raToHa(ra, self.LST_inRads())
def haToRa(self, ha):
return CoordUtil.raToHa(ha, self.LST_inRads())
def raToHa(self, ra):
return CoordUtil.raToHa(ra, self.LST_inRads())
def solve_dome_azimuth(self, telescope_pos, lst, nloops=10):
# Find the altitude and azimuth of the current pointing
# This should be valid in either hemisphere
pos = Position.raDecToAltAz(telescope_pos, self.site_latitude, lst)
telaz, telalt, ha = pos.az.R, pos.alt.R, CoordUtil.raToHa(telescope_pos.ra, lst).R
# Find the reference point on the optical axis in dome coordinates
# z: vertical
# y: north - south
# x: east - west
# theta: altitude of the polar axis from the horizontal plane
# phi: rotation of dec axis about polar axis
# Meaning of x and y compared to sky depends on the hemisphere!
# z: always + up
# y: always + toward N for +lat or S for -lat
# x: maintains right-handed coordinate system with z and y
# thus x is + to E for +lat and to W for -lat
# theta: always positive from the horizontal plane to the pole
# phi: rotation about polar axis
# and is +90 for a horizontal axis with OTA toward +x
# and is 0 for OTA over mount with dec axis counterweight down
# and is -90 for a horizontal axis with OTA toward -x
# We have a German equatorial and the origin changes with ha
# Assign phi based on an assumption about the basis derived from the ha
phi = ha
# Assign theta
theta = abs(self.site_latitude.R)
# Find the dome coordinates of the OTA reference point for a German equatorial
# This works in either hemisphere
x0 = self.mount_dec_length * sin(phi)
y0 = -self.mount_dec_length * cos(phi) * sin(theta) + self.mount_dec_offset
z0 = self.mount_dec_length * cos(phi) * cos(theta) + self.mount_dec_height
# (x,y,z) is on the optical axis
# Iterate to make this point also lie on the dome surface
# Begin iteration assuming the zero point is at the center of the dome
# Telescope azimuth is measured from the direction to the pole
d = 0.
r = self.dome_radius
if self.site_latitude.R <= 0.:
telaz2 = telaz - pi
# between (0, 2pi):
if telaz2 > 2 * pi:
telaz2 -= 2 * pi
elif telaz2 < 0:
telaz2 += 2 * pi
telalt2 = telalt
# Iterate for convergence
n = 0
while n < nloops:
d -= r - self.dome_radius
rp = self.dome_radius + d
x = x0 + rp * cos(telalt2) * sin(telaz2)
y = y0 + rp * cos(telalt2) * cos(telaz2)
z = z0 + rp * sin(telalt2)
r = sqrt(x * x + y * y + z * z)
# Repeat the calculation correcting the assumed OTA path length each time
# This converges quickly so just do a few loops and assume it is ok
# print "n, r, rp: ", n, r, rp
n += 1
# Use (x,y,0) from the interation to find the azimuth of the dome
# Azimuth is N (0), E (90), S (180), W (270) in both hemispheres
# However x and y are different in the hemispheres so we fix that here
zeta = atan2(x, y)
if (zeta > - 2. * pi) and (zeta < 2. * pi):
if self.site_latitude.R <= 0.:
zeta += pi
else:
zeta = telaz
if zeta < 0:
zeta = zeta + 2 * pi
elif zeta > 2 * pi:
zeta - 2 * pi
return zeta * 180 / pi
# model_file.write('Latitude, %s\n' % site["latitude"].R)
#
# model_file.write('Dome Azm, Scope Ha, Scope Dec, Pier Side\n')
i = 1
try:
# for az, alt in [(ii, jj) for ii in np.arange(15, 360, 10) for jj in np.arange(25, 90, 20)]:
while sheet.cell(i, 1).value != '':
if sheet.cell(i, 9).value == '':
az, alt = float(sheet.cell(i, 1).value), float(sheet.cell(i, 2).value)
print '@> alt, az', alt, az
telescope.slewToAltAz(Position.fromAltAz(Coord.fromD(alt), Coord.fromD(az)))
etiqueta = raw_input('Etiqueta: ')
alt, az, ra, dec = telescope.getAlt().R, telescope.getAz().R, telescope.getRa().R, telescope.getDec().R
lst = site.LST()
ha = CoordUtil.raToHa(ra, lst).R
j = 3
for val in (alt, az, ha, ra, dec, lst, etiqueta, str(datetime.datetime.now())):
sheet.update_cell(i, j, val) #model_file.write('%f,%f,%f,pierWest\n' % (az, ha, dec))
j += 1
# i += 1
# raw_input('Move the telescope, re-center, and press ENTER to grab. CRTL+C to finish.')
i += 1
except KeyboardInterrupt:
# model_file.close()
print '\nDone'
# Generate the file like:
# Latitude, 51,07861
# Dome Azm, Scope Ha, Scope Dec, Pier Side
# 180,-4,44089209850063E-16,-3,18055468146352E-15,pierWest
