def track(self):
self.dish.home()
self.set_lo(lo_amp, lo_freq)
self.point()
takespec.takeSpec(args)
def main():
"""Records 1 minute of test data from the Leuschner dish.
"""
parser = argparse.ArgumentParser(description="Record test data from the dish.")
parser.add_argument(
"--home", action="store_true", default=False, help="run homing routine (warning, takes a few minutes)"
)
parser.add_argument("--verbose", action="store_true", default=True, help="print verbose output")
parser.add_argument("--lon", type=float, default=220, help="LO frequency.")
args = parser.parse_args()
# Set lat and long (for Leuschner from Google Maps), and date
obs = ephem.Observer()
obs.lat = 37.919481 * np.pi / 180
obs.long = -122.153435 * np.pi / 180
# Compute number of spectra to record (integration time=1 min)
length = 60 # integration time in seconds
num_spec = length / 3
print "Observing galactic coordinates long=%s, lat=0" % (str(args.lon))
point_gal = ephem.Galactic(args.lon * np.pi / 180, 0)
point_eq = ephem.Equatorial(point_gal)
# Compute az alt
point = ephem.FixedBody()
point._ra = point_eq.ra
point._dec = point_eq.dec
# Create synthesizer interface
s = dish_synth.Synth(verbose=args.verbose)
s.set_freq(1272.4) # frequency in MHZ
s.set_amp(10) # amplitude in dbM
# Create dish interface
d = dish.Dish(verbose=args.verbose)
d.noise_off()
if args.home:
d.home()
obs.date = ephem.now()
point.compute(obs)
print "RA: " + str(point.ra)
print "DEC: " + str(point.dec)
d.point(point.alt * 180 / np.pi, point.az * 180 / np.pi)
# Record spectra noise off
takespec.takeSpec("test_" + str(args.lon) + "_0_noise_off", numSpec=num_spec)
d.noise_on()
# Record spectra noise on
takespec.takeSpec("test_" + str(args.lon) + "_0_noise_on", numSpec=num_spec)
# Record spectra with LO set 4MHz lower and noise off
s.set_freq(1268.4) # frequency in MHZ
d.noise_off()
takespec.takeSpec("test_" + str(args.lon) + "_0_noise_off_low", numSpec=num_spec)
def main():
"""Quick script to point telescope and stuff"""
obs = cat.obs_leuschner()
target = cat.make_lbdeg_obj(300, 60) # l, b
obs.date = ephem.now()
target.compute(obs)
d = dish.Dish(verbose=True)
# d.home()
s = dish_synth.Synth(verbose=True)
s.set_amp(10)
s.set_freq(1270) # Usually 1270, just to match Vikram's LO freq
print 'Alt, az of target: %s, %s' % (target.alt, target.az)
canpnt = check_pnt(obs, target, d)
print 'Can point? %s' % canpnt
if canpnt:
pnt_obj(obs, target, d)
started = datetime.now()
takespec.takeSpec('single_pnt_test', numSpec=60)
ended = datetime.now()
print 'Time elapsed: %s' % (ended - started)
except (ValueError):
lst_now = rlab.getLST() # Local Sidereal Time
if isup[0] - lst_now < .2 and isup[
0] - lst_now > 0: # If point rises in 10 minutes
print 'Waiting for point to rise'
time.sleep(600) # Waiting 10 minutes
else:
condition2 = False
print 'ValueError returned, moving to next point!'
if not condition2: continue
## Finishing to check. If waited 10 min or ValueError returned,
## breaks code and move on to next point. Else, takes spectra (next).
takespec.takeSpec('specON/bubbleON' + str(j) + ',' + str(i),
numSpec=128)
print
print 'Spectra taken!'
while True: # Retry for noise
try:
d.noise_on()
break
except:
print 'Noise set failed... trying again'
d.point(alt, az)
takespec.takeSpec('noiseON/bubbleNOISE_ON' + str(j) + ',' +
str(i),
numSpec=32)
except (ValueError):
lst_now = rlab.getLST() # Local Sidereal Time
if isup[0] - lst_now < .2 and isup[0] - lst_now > 0: # If point rises in 10 minutes
print 'Waiting for point to rise'
time.sleep(600) # Waiting 10 minutes
else:
condition2 = False
print 'ValueError returned, moving to next point!'
if not condition2: continue
## Finishing to check. If waited 10 min or ValueError returned,
## breaks code and move on to next point. Else, takes spectra (next).
takespec.takeSpec('specON/bubbleON' + str(j) + ','+ str(i), numSpec = 128)
print
print 'Spectra taken!'
while True: # Retry for noise
try:
d.noise_on()
break
except:
print 'Noise set failed... trying again'
d.point(alt, az)
takespec.takeSpec('noiseON/bubbleNOISE_ON' + str(j) + ',' + str(i), numSpec = 32)
print
print 'Noise taken!'
def data_taker():
#update date
date = 'Apr_30'
d = dish.Dish(verbose=True)
s = dish_synth.Synth()
obs = ephem.Observer()
obs.lat = 37.832*np.pi/180
obs.long = -122.2573*np.pi/180
#d.home()
b_lat = np.loadtxt('gal_lat_b.gz')
l_long = np.loadtxt('gal_long_l.gz')
for i in range (0, len(l_long), 1):
#update log name
sys.stdout = open('obs_log_Apr_30_6_to_10pm.txt', 'a')
b = b_lat[i]
l = l_long[i]
#lower LO frequency
s.set_freq(1272.4)
s.set_amp(10.0)
try:
az, alt= gal_to_eq(b_lat[i], l_long[i])
d.point(az, alt, validate=True)
except ValueError:
print 'invalid pointing, skipping point'
continue
#if pointing fails, will move on to the next pointing (go back to for loop)
while True:
try:
d.point(az, alt)
break
except:
print 'Pointing failed, trying again'
while True:
try:
d.noise_off()
break
except:
print "Turning noise off failed, trying again"
obs.date = ephem.now()
LST = obs.sidereal_time()
takespec.takeSpec('spec_low_freq_noise_off_%s_%s_%s_%s.gz' % (b, l, LST, date), numSpec=120)
print 'low freq noise off spectra done, b = %s, l = %s' % (b, l)
while True:
try:
d.noise_on()
break
except:
print "Turning noise on failed, trying again"
obs.date = ephem.now()
LST = obs.sidereal_time()
takespec.takeSpec('spec_low_freq_noise_on_%s_%s_%s_%s.gz' % (b, l, LST, date), numSpec=40)
print 'low freq noise on spectra done, b = %s, l = %s' % (b, l)
#higher LO frequency
s.set_freq(1268.4)
s.set_amp(10.0)
try:
az, alt= gal_to_eq(b_lat[i], l_long[i])
d.point(az, alt,validate=True)
except ValueError:
print "invalid pointing, skipping point"
continue
while True:
try:
d.point(az, alt)
break
except:
print "Pointing failed, trying again"
while True:
try:
d.noise_off()
break
except:
print "Turning noise off failed, trying again"
obs.date = ephem.now()
LST = obs.sidereal_time()
takespec.takeSpec('spec_up_freq_noise_off_%s_%s_%s_%s.gz' % (b, l, LST, date), numSpec=120)
print 'upper lo freq noise off spectra done, b = %s, l = %s' % (b, l)
while True:
try:
d.noise_on()
break
except:
print "Turning noise on failed, trying again"
obs.date = ephem.now()
LST = obs.sidereal_time()
takespec.takeSpec('spec_up_freq_noise_on_%s_%s_%s_%s.gz' % (b, l, LST, date), numSpec=40)
print 'upper lo freq noise on spectra done, b = %s, l = %s' % (b, l)
def record_pointing(d, s, l, b, point, file_name='raw/'+time.strftime("%m-%d-%Y_%H%M%S"),
int_time=150, repoint_freq=30):
"""Records data from a point on the sky for a specified integration time.
Spectra for an observation at two different LO frequencies and a separate
10 second observation with the noise diode on are saved in the specified
files.
Args:
d (dish.Dish): an interface to the Leuschner dish
s (dish_synth.Synth): an interface to the synthesizer used to set the LO
frequency
file_name (String, optional): file name prefix to save the data
int_time (float, optional): integration time (in seconds).
"""
logger = logging.getLogger('leuschner')
logger.debug('Recording data')
status = 0
# lets us keep data from this pointing in unique directory,
# since each time we point we will have different noise/background spectrums
record_id = time.strftime("%m-%d-%Y_%H%M%S")
# Compute number of spectra to record (integration time/3)
num_spec = int(int_time*3)
num_spec_noise = 5 * 3
OBS.date = ephem.now()
point.compute(OBS)
d.point(np.rad2deg(point.alt), np.rad2deg(point.az))
# Take measurement with noise diode off at the higher LO frequency (ON frequency)
s.set_freq(LO_ON)
s.set_amp(10.0)
d.noise_off()
try:
takespec.takeSpec(file_name+'_ON', numSpec=num_spec)
except IOError:
logger.error('%s not saved or averaged.' % (file_name+'_ON'))
status = -1
else:
# Only want to average if the takespec was successful!
averager.average(file_name+'_ON0.log', lo=LO_ON, l=l, b=b, record_id=record_id)
# Take 10 second measurement with the noise diode on at the ON frequency
d.noise_on()
try:
takespec.takeSpec(file_name+'_ON_noise', numSpec=num_spec_noise)
except IOError:
logger.error('%s not saved or averaged.' % (file_name+'_ON_noise'))
status = -1
else:
averager.average(file_name+'_ON_noise0.log', lo=LO_ON, l=l, b=b, record_id=record_id, noise=True)
# repoint for the second half of the measurement
OBS.date = ephem.now()
point.compute(OBS)
d.point(np.rad2deg(point.alt), np.rad2deg(point.az))
# Take 10 second measurement with the noise diode on at the OFF frequency
s.set_freq(LO_OFF)
s.set_amp(10.0)
try:
takespec.takeSpec(file_name+'_OFF_noise', numSpec=num_spec_noise)
except IOError:
logger.error('%s not saved or averaged.' % (file_name+'_OFF_noise'))
status = -1
else:
averager.average(file_name+'_OFF_noise0.log', lo=LO_OFF, l=l, b=b, record_id=record_id, noise=True)
d.noise_off()
# Take measurement with noise diode off at the lower LO frequency (OFF frequency)
s.set_freq(LO_OFF)
s.set_amp(10.0)
d.noise_off()
try:
takespec.takeSpec(file_name+'_OFF', numSpec=num_spec)
except IOError:
logger.error('%s not saved or averaged.' % (file_name+'_OFF'))
status = -1
else:
averager.average(file_name+'_OFF0.log', lo=LO_OFF, l=l, b=b, record_id=record_id)
logger.debug('Finished recording data')
