def log_message(msg, level='info', boldtype=False, colourtext='black'):
bold = boldtype
colour = colourtext
if level == 'debug':
user_logger.debug(str(msg))
elif level == 'info':
user_logger.info(str(msg))
elif level == 'warn':
user_logger.warn(str(msg))
colour = 'orange'
bold = True
elif level == 'error':
user_logger.error(str(msg))
colour = 'red'
bold = True
if not bold and colour == 'black':
email_msg.append(timestamp() + level.upper() + ' ' + str(msg))
elif colour != 'black' and not(bold):
email_msg.append('<font color="{colour}">{timestamp} {level} {msg}</font>'.format(
colour=colour, timestamp=timestamp(), level=level.upper(), msg=str(msg)))
else:
email_msg.append('<font color="{colour}"><b>{timestamp} {level} {msg}</b></font>'.format(
colour=colour, timestamp=timestamp(), level=level.upper(), msg=str(msg)))
def move_antennas(ants, azim, elev):
if (-185.0 > azim) or (azim > 275.0):
raise ParametersExceedTravelRange("Cannot perform requested slew, "
"azimuth travel range exceeded.")
if (14.65 > elev) or (elev > 92.0):
raise ParametersExceedTravelRange("Cannot perform requested slew, "
"elevation travel range exceeded.")
# Use slew to bypass pointing model
ants.req.ap_slew(azim, elev)
# Since we are not using the proxy request we will have to explicitly
# wait for the servo brakes to open and on-target sensor to update.
time.sleep(4)
try:
ants.wait('ap.on-target', True, timeout=300)
time.sleep(2) # Track for a bit to allow deacceleration
except:
user_logger.error(
"Timed out while waiting for AP to reach starting position.")
raise
user_logger.info("AP has reached start position.")
ants.req.mode('STOP')
time.sleep(3)
current_az = ants.req.sensor_value('ap.actual-azim')
current_el = ants.req.sensor_value('ap.actual-elev')
current_ridx = ants.req.sensor_value('ap.indexer-position-raw')
user_logger.info("Azimuth readings: %s", current_az)
user_logger.info("Elevation readings: %s", current_el)
user_logger.info("Indexer position readings: %s", current_ridx)
def compare_sensors(sensors1, sensors2, num):
""" return True if sensors2 - sensors1 > num"""
return_value = False
for sen in sensors1.keys():
if sensors2[sen] - sensors1[sen] > num:
return_value = True
user_logger.error('%s has changed by %g from %g to %g')
return return_value
def stop_ants(kat):
if not kat.dry_run and kat.ants.req.mode('STOP') :
user_logger.info("Setting Antenna Mode to 'STOP', Powering on Antenna Drives.")
cntr = 60
for ant in kat.ants:
while ant.sensor.mode.get_value() not in ['STOP']:
time.sleep(1)
cntr -= 1
if cntr < 0:
break
else:
user_logger.error("Unable to set Antenna mode to 'STOP'.")
def test_sequence(ants, disable_corrections=False, dry_run=False):
# Disable ACU pointing corrections
if disable_corrections:
ants.req.ap_enable_point_error_systematic(False)
ants.req.ap_enable_point_error_tiltmeter(False)
if not dry_run:
try:
ants.wait('ap.enable-point-error-systematic', False, timeout=1)
ants.wait('ap.enable-point-error-tiltmeter', False, timeout=1)
except:
user_logger.error(
"Failed to disable ACU pointing corrections.")
raise
user_logger.warning("ACU pointing corrections have been disabled.")
for azim in [-45, 45, 135, 225]:
# Start at low elevation
elev = 20
# Set this target for the receptor target sensor
target = katpoint.Target('Name, azel, %s, %s' % (azim, elev))
user_logger.info("Starting position: '%s' ", target.description)
if not dry_run:
move_antennas(ants, azim, elev)
# Move to high elevation
elev = 80
# Set this target for the receptor target sensor
target = katpoint.Target('Name, azel, %s, %s' % (azim, elev))
user_logger.info("Move to high elevation: '%s' ", target.description)
if not dry_run:
move_antennas(ants, azim, elev)
# Wait for 10 minutes before moving to next position
user_logger.info(
"Dwell at high elevation for 10 minutes to check if indexer slips."
)
time.sleep(600)
# Return to low elevation
elev = 20
# Set this target for the receptor target sensor
target = katpoint.Target('Name, azel, %s, %s' % (azim, elev))
user_logger.info("Return to low elevation: '%s' ", target.description)
if not dry_run:
move_antennas(ants, azim, elev)
user_logger.info("Sequence Completed!")
def stow_test(ants, taz, tel, dry_run=False):
# send this target to the antenna.
target = katpoint.Target('Name, azel, %s, %s' % (taz, tel))
if not dry_run:
# Use slew to bypass pointing model
ants.req.ap_slew(taz, tel)
# Since we are not using the proxy mode we will have to explicitly wait
# for the servo brakes to open and on-target sensor to update.
time.sleep(4)
user_logger.info("Starting target description: '%s' ", target.description)
if not dry_run:
try:
ants.wait('ap.on-target', True, timeout=300)
time.sleep(2) # Track for a bit to allow deacceleration
except:
user_logger.error("Timed out while waiting for AP to reach "
"starting position.")
raise
user_logger.info("AP has reached start position, beginning stow test")
user_logger.info("Activating receptor windstows")
ants.req.set_windstow(1)
ants.wait('ap.mode', 'stowed', timeout=120)
# Wait a bit before clearing
user_logger.info("Stow position reached. Monitoring for 20 seconds.")
time.sleep(20)
user_logger.info("Clearing receptor windstow condition")
ants.req.set_windstow(0)
ants.wait('mode', 'STOP', timeout=120)
# Wait a bit and issue the windstow again to simulate wind picking up
user_logger.info("Waiting 30 seconds before next 'gust'.")
time.sleep(30)
user_logger.info("Triggering 2nd windstow event.")
ants.req.set_windstow(1)
ants.wait('mode', 'STOW', timeout=120)
user_logger.info("Montitoring for 20 seconds")
# Reduced this time since we should already be up at stow position
time.sleep(20)
user_logger.info("Test concluded. Clearing windstow.")
# Restore system to normal
ants.req.set_windstow(0)
ants.wait('mode', 'STOP', timeout=120)
def __exit__(self, exc_type, exc_value, traceback):
"""Exit the data capturing session, stopping the capture."""
if exc_value is not None:
exc_msg = str(exc_value)
msg = "Session interrupted by exception (%s%s)" % \
(exc_value.__class__.__name__,
(": '%s'" % (exc_msg,)) if exc_msg else '')
if exc_type is KeyboardInterrupt:
user_logger.warning(msg)
else:
user_logger.error(msg, exc_info=True)
self.cbf.req.dbe_capture_stop(self.instrument)
user_logger.info('beamformer stopped')
# Suppress KeyboardInterrupt so as not to scare the lay user,
# but allow other exceptions that occurred in the body of with-statement
return exc_type is KeyboardInterrupt
def point(ants, target, timeout=300):
# send this target to the antenna.
ants.req.target(target)
ants.req.mode("POINT")
user_logger.info("Slewing to target : %s" % (target, ))
# wait for antennas to lock onto target
ants.set_sampling_strategy("lock", "period 1.0")
success = ants.wait("lock", True, timeout)
if success:
user_logger.info("Tracking Target : %s " % (target, ))
else:
failed = [client for client in success if not success[client]]
msg = "Waiting for sensor 'lock' == True "
# Report failure to user (including list of clients that failed)
msg += "reached timeout of %.1f seconds. " % (timeout, )
msg += "Clients %r failed." % (sorted(failed), )
user_logger.error(msg)
return success
def move_to(ants, az, el):
user_logger.info("Slewing to Az: '%s' El: '%s'", az, el)
# Use slew to bypass pointing model
ants.req.ap_slew(az, el)
# Since we are not using the proxy mode we will have to explicitly wait
# for the servo brakes to open and on-target sensor to update.
time.sleep(4)
try:
ants.wait('ap.on-target', True, timeout=300)
time.sleep(2) # Track for a bit to allow deacceleration
user_logger.info("Position reached...")
except:
user_logger.error("Timed out while waiting for AP to reach "
"requested position.")
raise
# Arbitrary pause before next movement
time.sleep(10)
def __exit__(self, exc_type, exc_value, traceback):
"""Exit the data capturing session, closing all streams."""
if exc_value is not None:
exc_msg = str(exc_value)
msg = "Session interrupted by exception (%s%s)" % \
(exc_value.__class__.__name__,
(": '%s'" % (exc_msg,)) if exc_msg else '')
if exc_type is KeyboardInterrupt:
user_logger.warning(msg)
else:
user_logger.error(msg, exc_info=True)
self.capture_stop()
# Suppress KeyboardInterrupt so as not to scare the lay user,
# but allow other exceptions that occurred in the body of with-statement
if exc_type is KeyboardInterrupt:
report_compact_traceback(traceback)
return True
else:
return False
def move_ri(ants, ridx_pos, dry_run=False):
if ridx_pos not in ['u', 'l', 's', 'x']:
raise ValueError("indexer position {} does not exist. active bands are 'u', 'l', 's', and 'x'".format(ridx_pos))
user_logger.info("Moving receiver indexers to '{}' position".format(ridx_pos))
ants.set_sampling_strategy("ap.ridx-brakes-released","period 0.5")
ants.req.ap_set_indexer_position(ridx_pos)
time.sleep(10)
if not dry_run:
try:
# Wait for indexer brakes to engage again
ants.wait('ap.ridx-brakes-released', False, timeout=60)
user_logger.info('{} position reached'.format(ridx_pos))
except Exception:
not_on_pos = []
not_on_pos = [ant.name for ant in ants if ant.sensor.ap_indexer_position.get_value() != ridx_pos]
user_logger.error("Indexer brakes did not engage on: {}".format(', '.join(not_on_pos)))
finally:
# allow brakes to engage and put antennas to stop
time.sleep(3)
ants.req.mode('STOP')
time.sleep(2)
def report_sensors(kat, filter, status):
user_logger.info("Requesting sensor values... (filter={}, status={})"
"".format(filter, status))
sensors = kat.list_sensors(filter=filter)
for s in sensors:
try:
sensor_obj = getattr(kat.sensor, escape_name(s[1]))
sensor_obj.get_value()
except:
user_logger.error('Could not get the sensor value for {}'.format(
s.name))
user_logger.info("Waiting...")
for i in range(0, len(sensors) / 20 + 1):
time.sleep(0.1)
sensors = kat.list_sensors(filter=filter, status=status)
for s in sensors:
name = s.name
reading = s.reading
val = str(reading.value)
valTime = reading.received_timestamp
updateTime = reading.timestamp
stat = reading.status
colour = get_sensor_colour(stat)
# Print status with stratchar prefix - indicates strategy has been set
val = val if len(
val
) <= 45 else val[:42] + "..." # truncate value to first 45 character
val = r"\n".join(val.splitlines())
user_logger.info("{} {} {} {} {}"
"".format(
col(colour) + name.ljust(45),
str(stat).ljust(15),
get_time_str(valTime).ljust(15),
get_time_str(updateTime).ljust(15),
str(val).ljust(45) + col('normal')))
)
else:
# Start capture session, which creates HDF5 file
with start_session(kat, **vars(opts)) as session:
user_logger.info("Setting up the signal Generator ip:port %s:%i." %
(siggen_ip, siggen_port))
if not kat.dry_run or opts.force_siggen: # prevent verifiing script from messing with things and failing to connect
sigconn = SCPI.SCPI(siggen_ip, siggen_port)
testcon = sigconn.testConnect()
else:
sigconn = Temp()
testcon = False
with sigconn as sig:
if testcon == False:
user_logger.error(
'Test connection to signal generator failed.')
else:
user_logger.info("Connected to Signal Generator:%s" %
(testcon))
sig.reset()
user_logger.info("Signal Generator reset")
sig.outputOn()
user_logger.info("Signal Generator output on")
sig.setFrequency((siggen_freq + siggen_freq_minor) * 1.0e6)
user_logger.info(
"Signal Generator frequency is set to %7.3f MHz" %
(sig.getFrequency() * 1.0e-6))
siggen_freq = sig.getFrequency()
sig.setPower(siggen_power)
user_logger.info(
"Signal Generator Power is set to %f dBm" %
if atten < 32 and (voltage > adc_volt + 20): # Up
user_logger.info(
"'%s' band %s %s: Changing attenuation from %idB to %idB "
% (band, ant.name, pol, atten, atten + 1))
ant.req.dig_attenuation(pol, atten + 1)
ant_update[i] = True
if atten > 0 and (voltage < adc_volt
or std < adc_std_in):
user_logger.info(
"'%s' band %s %s: Changing attenuation from %idB to %idB "
% (band, ant.name, pol, atten, atten - 1))
ant.req.dig_attenuation(pol, atten - 1)
ant_update[i] = True
else:
user_logger.error(
"'%s' band %s %s band is not in the list of valid bands "
% (band, ant.name, pol))
lines = []
summary = []
atten_ref = {}
ant_list = []
lines.append('Changing attenuation , report of refine_attenuation.py')
for ant in kat.ants:
band = get_ant_band(ant)
if band in bandlist:
ant_list.append(ant.name)
for pol in {'h', 'v'}:
std, atten, voltage = sample_bits(ant, pol, band=band)
lines.append("'%s' band %s %s: ,%i # std:%f vol:%f" %
(band, ant.name, pol, atten, std, voltage))
atten_ref['%s_%s' % (ant.name, pol)] = [
for ant, value_h, value_v in tmp_data:
try:
atten_ref['%s_%s_%s' % (band, ant, 'h')] = np.int(value_h)
atten_ref['%s_%s_%s' % (band, ant, 'v')] = np.int(value_v)
except ValueError:
user_logger.warning(
"'%s' band %s: attenuation value '%s','%s' is not an integer "
% (band, ant, value_h, value_v))
if not kat.dry_run:
for pol in {'h', 'v'}:
for ant in kat.ants: # note ant is an katcp antenna object
band = get_ant_band(ant)
key_lookup = '%s_%s_%s' % (band, ant.name, pol)
if key_lookup not in atten_ref:
user_logger.error(
"'%s' band %s %s: Has no attenuation value in the file "
% (band, ant.name, pol))
continue
atten = measure_atten(ant,
pol,
atten_ref=atten_ref[key_lookup],
band=band)
if atten != atten_ref[key_lookup]:
user_logger.info(
"'%s' band %s %s: Changing attenuation from %idB to %idB "
% (band, ant.name, pol, atten, atten_ref[key_lookup]))
ant.req.dig_attenuation(pol, atten_ref[key_lookup])
user_logger.info("Sleeping for 30 seconds ")
time.sleep(30)
# The sleep is because there is a potential +/-30sec loop in the
# state machine in the digitiser and sending a second command
kat.ants.set_sampling_strategy("ap.enable-point-error-tiltmeter", "event")
if not kat.ants.req.mode('STOP'):
user_logger.info("Setting antennas to mode 'STOP'")
time.sleep(2)
else:
raise RuntimeError("Unable to set antennas to mode 'STOP'!")
try:
test_sequence(kat.ants,
disable_corrections=opts.no_corrections,
dry_run=kat.dry_run)
finally:
# Restore ACU pointing corrections
kat.ants.req.ap_enable_point_error_systematic(False)
kat.ants.req.ap_enable_point_error_tiltmeter(True)
if not kat.dry_run:
try:
kat.ants.wait('ap.enable-point-error-systematic',
False,
timeout=1)
kat.ants.wait('ap.enable-point-error-tiltmeter',
True,
timeout=1)
except:
user_logger.error("Failed to reset ACU pointing corrections.")
raise
kat.ants.req.mode('STOP')
user_logger.info("Stopping antennas")
#if len(args) == 0:
# raise ValueError("Please specify the sources to observe as arguments, either as "
# "description strings or catalogue filenames")
fl = '/../2.1-Tipping_Curve/TBGAL_CONVL.FITS'
hdulist = pyfits.open(fl)
Data = np.flipud(np.fliplr(
hdulist[0].data)) # data is in the first element of the fits file
ra = lambda x: int(x / 0.25) # helper functions
dec = lambda x: int((-x + 90) / 0.25)
with verify_and_connect(opts) as kat:
if not kat.dry_run and kat.ants.req.mode('STOP'):
user_logger.info(
"Setting Antenna Mode to 'STOP', Powering on Antenna Drives.")
else:
user_logger.error("Unable to set Antenna mode to 'STOP'.")
moon = kat.sources.lookup['moon']
with start_session(kat, **vars(opts)) as session:
if not opts.no_delays and not kat.dry_run:
if session.dbe.req.auto_delay('on'):
user_logger.info("Turning on delay tracking.")
else:
user_logger.error('Unable to turn on delay tracking.')
elif opts.no_delays and not kat.dry_run:
if session.dbe.req.auto_delay('off'):
user_logger.info("Turning off delay tracking.")
else:
user_logger.error('Unable to turn off delay tracking.')
if session.dbe.req.zero_delay():
user_logger.info("Zeroed the delay values.")
else:
def _set_dig_nd_(kat, timestamp, nd_setup=None, switch=0, cycle=False):
"""Setting and implementing digitiser noise diode command
Parameters
----------
kat : session kat container-like object
Container for accessing KATCP resources allocated to schedule block.
timestamp : float
Linux timestamp in seconds at which to switch noise diode
nd_setup : dict, optional (default = None, no pattern set)
Noise diode pattern setup, with keys:
'antennas': options are 'all', or 'm062', or ....,
'cycle_len': the cycle length [sec],
- must be less than 20 sec for L-band,
etc., etc.
switch : 0 or 1, optional (default = 0)
Switch all noise diodes off (0) or on (1)
Returns
-------
timestamp : float
Linux timestamp reported by digitiser
"""
if nd_setup is not None:
# selected antennas for nd pattern
nd_antennas = sorted(nd_setup['antennas'].split(","))
# nd pattern length [sec]
cycle_length = nd_setup['cycle_len']
# on fraction of pattern length [%]
on_fraction = nd_setup['on_frac']
msg = ('Repeat noise diode pattern every {} sec, '
'with {} sec on and apply pattern to {}'.format(
cycle_length,
float(cycle_length) * float(on_fraction), nd_antennas))
user_logger.info(msg)
else:
nd_antennas = sorted(ant.name for ant in kat.ants)
cycle_length = 1.
on_fraction = switch
# Noise diodes trigger is evaluated per antenna
replies = {}
for ant in nd_antennas:
ped = getattr(kat, ant)
# The digitiser master controller takes about 15-50 ms per request,
# so start panicking just before the deadline.
if time.time() > timestamp - 0.02:
user_logger.error(
'Requested noise diode timestamp %sZ will probably '
'be in the past - please increase lead time',
katpoint.Timestamp(timestamp))
skipped = ','.join(nd_antennas[len(replies):])
user_logger.error('Skipped setting these noise diodes: %s',
skipped)
break
replies[ant] = ped.req.dig_noise_source(timestamp, on_fraction,
cycle_length)
if kat.dry_run:
msg = ('Dry-run: Set noise diode for antenna {} at '
'timestamp {}'.format(ant, timestamp))
user_logger.debug(msg)
if cycle:
# add time [sec] to ensure all digitisers set at the same time
timestamp += cycle_length * on_fraction
# assuming ND for all antennas must be the same
# only display single timestamp
if not kat.dry_run:
timestamp = _katcp_reply_(replies)
# test incorrect reply check
if len(replies) < len(nd_antennas):
user_logger.error('Noise diode activation not in sync')
if np.isfinite(timestamp):
msg = (
'Set successful noise diodes with average timestamp {:.0f} ({}Z)'.
format(timestamp, katpoint.Timestamp(timestamp)))
user_logger.debug('DEBUG: {}'.format(msg))
return timestamp
def track(ant, taz, tel, total=1, dry_run=False):
# Direction variable ie. up/down, clockwise/anti-clockwise
h_direction = 1
v_direction = 1
# Number of cycles done
cycle_count = 0
# Total number of degrees travelled in each axis
az_total_angle = 0
el_total_angle = 0
#Total number of each type of slew completed
az_7_deg_slews = 0
el_7_deg_slews = 0
az_26_deg_slews = 0
el_23_deg_slews = 0
# send this target to the antenna.
target = katpoint.Target('Name, azel, %s, %s' % (taz, tel))
if not dry_run:
# Use slew to bypass pointing model
ant.req.ap_slew(taz, tel)
# Since we are not using the proxy mode we will have to explicitly wait
# for the servo brakes to open and on-target sensor to update.
time.sleep(4)
user_logger.info("Starting target description: '%s' ", target.description)
if not dry_run:
try:
ant.wait('ap.on-target', True, timeout=300)
time.sleep(2) # Track for a bit to allow deacceleration
except:
user_logger.error(
"Timed out while waiting for AP to reach starting position.")
raise
user_logger.info(
"AP has reached start position, beginning endurance cycle")
if not dry_run:
last_az = ant.sensor.ap_actual_azim.get_value()
last_el = ant.sensor.ap_actual_elev.get_value()
else:
last_az = -135
last_el = 15
while cycle_count <= total:
# Cycle loop
# Azimuth cycle is 7, 26, 7 degrees
# Elevation cycle is 7, 23.5, 7 degrees
# Azel = [(7,7),(26,23.5),(7,7)]
for az_offset, el_offset in [(7, 7), (26, 23), (7, 7)]:
taz += az_offset * h_direction # Find new coordinate based on current position
tel += el_offset * v_direction
# send this target to the antenna.
target = katpoint.Target('Name, azel, %s, %s' % (taz, tel))
if not dry_run:
# Use slew to bypass pointing model
ant.req.ap_slew(taz, tel)
# Since we are not using the proxy mode we will have to explicitly wait
# for the servo brakes to open and on-target sensor to update.
time.sleep(4)
user_logger.info("Target description: '%s' ( %s degree slew )",
target.description, str(az_offset))
if not dry_run:
try:
ant.wait('ap.on-target', True, timeout=300)
time.sleep(2) # Track for a bit to allow deacceleration
except:
user_logger.error(
"Timed out while waiting for AP to complete a slew.")
user_logger.info("7 deg slews: az - '%s', el - '%s' ",
az_7_deg_slews, el_7_deg_slews)
user_logger.info("26/23 deg slews: az - '%s', el - '%s' ",
az_26_deg_slews, el_23_deg_slews)
user_logger.info(
"Total degrees travelled: az - '%s', el - '%s' ",
az_total_angle, el_total_angle)
raise
# Get the current position
if not dry_run:
current_az = ant.sensor.ap_actual_azim.get_value()
current_el = ant.sensor.ap_actual_elev.get_value()
else:
current_az = -135
current_el = 15
# Add the angle travelled to the accumulated value
az_total_angle += abs(current_az - last_az)
el_total_angle += abs(current_el - last_el)
# Update last_<axis> values
last_az = current_az
last_el = current_el
if az_offset == 7:
az_7_deg_slews += 1
else:
az_26_deg_slews += 1
if el_offset == 7:
el_7_deg_slews += 1
else:
el_23_deg_slews += 1
# Update cycle counter
cycle_count += 1
# If we have done 2 elevation cycles then reverse direction
if cycle_count % 2 == 0:
v_direction = v_direction * -1
# If we have done 9 azimuth cycles then reverse direction
if cycle_count % 9 == 0:
h_direction = h_direction * -1
# Only need this bit if we are not doing indexer test
#if not dry_run:
# time.sleep(228)
if not dry_run:
ant.req.mode('STOP')
# Add a sleep since the indexer portion of the script
# does not use the waiting functionality that is part
# of the receptor proxy mode requests
time.sleep(3)
# NOTE: Using the indexer positioning time spec as we are more
# concerned with repetitions than accuracy for this test.
indexer_timeout = 60
# Position raw changed after indexer configurations
ridx_angle = {'s': -0.618, 'l': 39.248, 'x': 79.143, 'u': 119.405}
ridx_sequence = ['s', 'l', 'x', 'u']
# TODO: Revisit this once we have more information from AP team
# about indexer drift issues
if not dry_run:
# If we are closer to 'u' than 's', then start from 'u' instead
if ant.sensor.ap_indexer_position_raw.get_value() > 60:
ridx_sequence.reverse()
ridx_last_position = ant.sensor.ap_indexer_position.get_value()
else:
ridx_last_position = None
# NOTE: we skip the first position in the list if we are already
# there because the indexer seems to end up in a 'moving'
# state after a few cycles of operating the drive. Revisit
# this after feedback from Nico
if ridx_last_position == ridx_sequence[0]:
ridx_sequence = ridx_sequence[1:]
if not dry_run:
for pos in ridx_sequence:
ridx_movement_start_time = time.time()
user_logger.info("--- Moving RI to position: '%s' ---",
pos.upper())
ant.req.ap_set_indexer_position(pos)
# TODO: Add a promximity check for S position in case this increased
# sleep still does not help
# Wait for indexer brakes to open
time.sleep(3)
try:
# Wait for indexer brakes to engage again
ant.wait('ap.ridx-brakes-released',
False,
timeout=indexer_timeout)
except:
user_logger.error("Indexer brakes did not engage "
"(hunting issue). Giving up and "
"trying the next position.")
ant.req.mode('STOP')
time.sleep(3)
# NOTE: We do not raise the timeout exception as we want
# to try to continue.
# Wait for power to encoder to switch off
time.sleep(5)
ridx_current_position = ant.sensors.ap_indexer_position.get_value(
)
time_to_index = time.time() - ridx_movement_start_time
ridx_position_raw = ant.sensor.ap_indexer_position_raw.get_value(
)
ridx_brakes_released = ant.sensor.ap_ridx_brakes_released.get_value(
)
if ridx_current_position != pos:
user_logger.error(
"Indexer error after %s seconds! "
"Requested position: '%s'. "
"Current position: '%s'. "
"Encoder reading is %s degrees. "
"Position error: %.6f degrees. "
"Brakes released: '%s'. ", time_to_index, pos.upper(),
ridx_current_position, ridx_position_raw,
abs(ridx_angle[pos] - ridx_position_raw),
ridx_brakes_released)
# NOTE: We ignore the failed check here for now and
# continue the script by not raising an exception.
else:
user_logger.info(
"Brake engaged. The offset from the requested position: "
"'%s' is %.6f degree(s)", pos.upper(),
abs(ridx_angle[pos] - ridx_position_raw))
user_logger.info(
"Request for angle '%s' to final angle '%s' "
"took '%s' seconds.", ridx_angle[pos],
ridx_position_raw, time_to_index)
# Wait a little before requesting next indexer position
time.sleep(5)
# Print out slew numbers once all cycles are completed
user_logger.info("7 deg slews: az - '%s', el - '%s' ", az_7_deg_slews,
el_7_deg_slews)
user_logger.info("26/23 deg slews: az - '%s', el - '%s' ", az_26_deg_slews,
el_23_deg_slews)
user_logger.info("Total degrees travelled: az - '%s', el - '%s' ",
az_total_angle, el_total_angle)
def reversescan(session, target, nd_period=None, lead_time=None, **kwargs):
"""Reverse scan observation.
This scan is done in "Reverse"
This means that it is given an area to scan (via kwargs)
rather that a target and parameters
Parameters
----------
session: `CaptureSession`
target: katpoint.Target
nd_period: float
noisediode period
lead_time: float
noisediode trigger lead time
"""
# trigger noise diode if set
trigger(session.kat, duration=nd_period, lead_time=lead_time)
if 'radec_p1' in kwargs and 'radec_p2' in kwargs:
# means that there is a target area
# find lowest setting part or
# highest rising part
antenna = copy.copy(target.antenna)
target_list = []
for i in range(1, _MAX_POINTS_IN_SCAN_AREA_POLYGON + 1):
key = 'radec_p%i' % i
if key in kwargs:
target_list.append(
katpoint.Target(
't%i,radec,%s' % (i, kwargs[key]),
antenna=target.antenna,
))
else:
user_logger.error(
"No scan area defined - require radec_p1 and radec_p2")
return False
direction = kwargs.get("direction", False)
scan_speed = kwargs.get("scan_speed", _DEFAULT_SCAN_SPEED_ARCMIN_PER_SEC)
obs_start_ts = katpoint.Timestamp(time.time()).to_ephem_date()
# use 1 deg offset to pre-position >4 min in the future to take into account slewing
el, az_min, az_max, t_start, t_end = _get_scan_area_extents(target_list,
antenna,
obs_start_ts,
offset_deg=1)
# TODO: get horizon limit from observation - may want to pass limits of
# the "acceptable elevation extent" into _get_scan_area_extents.
if _MIN_HORIZON_EL_FOR_SCAN_DEG > np.degrees(el):
user_logger.warning(
"Source and scan below horizon: %s < %s",
np.degrees(el),
_MIN_HORIZON_EL_FOR_SCAN_DEG,
)
return False
scan_target = katpoint.construct_azel_target(katpoint.wrap_angle(az_min),
el)
scan_target.name = target.name
# katpoint destructively set dates and times during calculation
# restore datetime before continuing
scan_target.antenna = antenna
scan_target.antenna.observer.date = obs_start_ts
user_logger.info("Slew to scan start") # slew to target.
target_visible = session.track(scan_target, duration=0.0, announce=False)
if not target_visible:
user_logger.warning(
"Start of scan is not visible! Elevation: %.1f deg.",
np.degrees(el))
return False
# This is the real scan
obs_start_ts = katpoint.Timestamp(time.time()).to_ephem_date()
el, az_min, az_max, t_start, t_end = _get_scan_area_extents(
target_list, antenna, obs_start_ts)
scan_target = katpoint.construct_azel_target(
katpoint.wrap_angle((az_min + az_max) / 2.), el)
scan_target.name = target.name
# katpoint destructively set dates and times during calculation
# restore datetime before continuing
scan_target.antenna = antenna
scan_target.antenna.observer.date = obs_start_ts
scan_start = np.degrees(az_min - (az_min + az_max) / 2.)
scan_end = np.degrees(az_max - (az_min + az_max) / 2.)
scanargs = {}
if "projection" in kwargs:
scanargs["projection"] = kwargs["projection"]
# take into account projection effects of the sky and convert to degrees per second
# E.g., 5 arcmin/s should translate to 5/60/cos(el) deg/s
scan_speed = (scan_speed / 60.0) / np.cos(el)
scanargs["duration"] = abs(scan_start -
scan_end) / scan_speed # Duration in seconds
user_logger.info("Scan duration is %.2f and scan speed is %.2f deg/s",
scanargs["duration"], scan_speed)
user_logger.info("Start Time: %s", t_start)
user_logger.info("End Time: %s", t_end)
num_scan_lines = 0
while time.time() <= t_end.secs:
if direction:
scanargs["start"] = scan_start, 0.0
scanargs["end"] = scan_end, 0.0
else:
scanargs["start"] = scan_end, 0.0
scanargs["end"] = scan_start, 0.0
user_logger.info("Azimuth scan extent [%.1f, %.1f]" %
(scanargs["start"][0], scanargs["end"][0]))
target_visible = scan(session,
scan_target,
nd_period=nd_period,
lead_time=lead_time,
**scanargs)
direction = not direction
if target_visible:
num_scan_lines += 1
user_logger.info("Scan completed - %s scan lines", num_scan_lines)
return num_scan_lines > 0
def pattern(kat,
nd_setup,
lead_time=_DEFAULT_LEAD_TIME,
):
"""Start background noise diode pattern controlled by digitiser hardware.
Parameters
----------
kat : session kat container-like object
Container for accessing KATCP resources allocated to schedule block.
nd_setup : dict
Noise diode pattern setup, with keys:
'antennas': options are 'all', or 'm062', or ....,
'cycle_len': the cycle length [sec],
- must be less than 20 sec for L-band,
etc., etc.
lead_time : float, optional (default = system default lead time)
Lead time before digitisers pattern is set [sec]
Returns
-------
timestamp : float
Linux timestamp reported by digitiser
"""
# nd pattern length [sec]
max_cycle_len = _get_max_cycle_len(kat)
if float(nd_setup['cycle_len']) > max_cycle_len:
msg = 'Maximum cycle length is {} seconds'.format(max_cycle_len)
raise RuntimeError(msg)
user_logger.trace('TRACE: max cycle len {}'
.format(max_cycle_len))
# Try to trigger noise diodes on specified antennas in array simultaneously.
# - add a default lead time to ensure enough time for all digitisers
# to be set up
if lead_time >= max_cycle_len:
user_logger.error('Nonstandard ND usage: lead time > max cycle len')
raise RuntimeError('ND pattern setting cannot be achieved')
start_time = _get_nd_timestamp_(lead_time)
user_logger.trace('TRACE: desired start_time {} ({})'
.format(start_time,
time.ctime(start_time)))
msg = ('Request: Set noise diode pattern to activate at {} '
'(includes {} sec lead time)'
.format(start_time,
lead_time))
user_logger.warning(msg)
nd_antennas = nd_setup['antennas']
sb_ants = ",".join(str(ant.name) for ant in kat.ants)
nd_setup['antennas'] = sb_ants
if nd_antennas == 'all':
cycle = False
elif nd_antennas == 'cycle':
cycle = True
else:
cycle = False
nd_setup['antennas'] = ",".join(
ant.strip() for ant in nd_antennas.split(",") if ant.strip() in sb_ants
)
user_logger.info('Antennas found in subarray, setting ND: {}'
.format(nd_setup['antennas']))
# Noise Diodes are triggered simultaneously
# on specified antennas in the array
timestamp = _set_dig_nd_(kat,
start_time,
nd_setup=nd_setup,
cycle=cycle)
user_logger.trace('TRACE: now {} ({})'
.format(time.time(),
time.ctime(time.time())))
user_logger.trace('TRACE: timestamp {} ({})'
.format(timestamp,
time.ctime(timestamp)))
wait_time = timestamp - time.time()
user_logger.trace('TRACE: delta {}'
.format(wait_time))
time.sleep(wait_time)
user_logger.trace('TRACE: set nd pattern at {}, slept {}'
.format(time.time(),
wait_time))
msg = ('Report: Switch noise-diode pattern on at {}'
.format(timestamp))
user_logger.info(msg)
return timestamp
kind=opts.kind,
mirrorx=opts.mirrorx)
timeperstep = opts.sampletime
if len(args) == 0:
raise ValueError(
"Please specify a target argument via name ('Ori A'), "
"description ('azel, 20, 30') or catalogue file name ('sources.csv')")
# Check basic command-line options and obtain a kat object connected to the appropriate system
with verify_and_connect(opts) as kat:
if not kat.dry_run and kat.ants.req.mode('STOP'):
user_logger.info(
"Setting Antenna Mode to 'STOP', Powering on Antenna Drives.")
else:
user_logger.error("Unable to set Antenna mode to 'STOP'.")
catalogue = collect_targets(kat, args)
targets = catalogue.targets
if len(targets) == 0:
raise ValueError(
"Please specify a target argument via name ('Ori A'), "
"description ('azel, 20, 30') or catalogue file name ('sources.csv')"
)
target = targets[0] #only use first target
lasttargetel = target.azel()[1] * 180.0 / np.pi
# Initialise a capturing session (which typically opens an HDF5 file)
with start_session(kat, **vars(opts)) as session:
# Use the command-line options to set up the system
session.standard_setup(**vars(opts))
if not opts.no_delays and not kat.dry_run:
def rate_slew(ants,
azim,
elev,
speed=0.5,
reverse=False,
disable_corrections=False,
dry_run=False):
# Scale timeout with requested test speed. Full speed timeout is 5 min
rate_timeout = (float(2) / speed) * 300
# Only testing movement in azimuth, not elevation
azim_speed = speed
elev_speed = 0.0
sensor_name = "ap.actual-azim"
# Only testing 365 degrees, not full travel range (460 degrees)
expected_azim = (azim + 365.0 if speed > 0 else azim - 365.0)
# Position threshold 2 degrees to catch it at 0.5 second polling
# period at full speed (2 deg/sec).
threshold = 2
if (-185.0 < expected_azim < 275.0):
user_logger.info("Antennas will perform a rate slew to azimuth %s",
expected_azim)
else:
raise ParametersExceedTravelRange("Cannot perform 365 degree slew "
"within the AP azim travel range "
"from the given start position.")
# Set this target for the receptor target sensor
target = katpoint.Target('Name, azel, %s, %s' % (azim, elev))
if not dry_run:
# Use slew to bypass pointing model
ants.req.ap_slew(azim, elev)
# Since we are not using the proxy request we will have to explicitly
# wait for the servo brakes to open and on-target sensor to update.
time.sleep(4)
user_logger.info("Starting target description: '%s' ", target.description)
if not dry_run:
try:
ants.wait('ap.on-target', True, timeout=300)
time.sleep(2) # Track for a bit to allow deacceleration
except:
user_logger.error(
"Timed out while waiting for AP to reach starting position.")
raise
user_logger.info("AP has reached start position.")
if not dry_run:
if disable_corrections:
SPEM_state = False # np.any([a.sensors.ap_point_error_systematic_enabled.get_value() for a in ants]) # TODO finalize the commented-out snippet
TILT_state = True # np.any([a.sensors.ap_point_error_tiltmeter_enabled.get_value() for a in ants])
ants.req.ap_enable_point_error_systematic(False)
ants.req.ap_enable_point_error_tiltmeter(False)
ants.req.mode('STOP')
time.sleep(3)
ants.req.ap_rate(azim_speed, elev_speed)
user_logger.info("Performing rate slew to azimuth %s at %s deg/sec.",
expected_azim, azim_speed)
# Wait until we are within a threshold of the expected ending azimuth
ants.wait(sensor_name,
lambda c: abs(c.value - expected_azim) < threshold,
timeout=rate_timeout)
if reverse:
user_logger.info("Reverse slew selected...")
ants.req.mode('STOP')
time.sleep(8)
ants.req.ap_rate(-1 * azim_speed, elev_speed)
user_logger.info(
"Performing rate slew to azimuth %s at %s deg/sec.", azim,
azim_speed)
# Head back to the starting azim that was passed into the function
ants.wait(sensor_name,
lambda c: abs(c.value - azim) < threshold,
timeout=rate_timeout)
if disable_corrections:
ants.req.ap_enable_point_error_systematic(SPEM_state)
ants.req.ap_enable_point_error_tiltmeter(TILT_state)
user_logger.info("Sequence Completed!")
off1.name = 'off1'
off2_azel = katpoint.construct_azel_target(wrap_angle(moon.azel()[0] - np.radians(10)),
moon.azel()[1])
off2_azel.antenna = antenna
off2 = katpoint.construct_radec_target(off2_azel.radec()[0], off2_azel.radec()[1])
off2.antenna = antenna
off2.name = 'off2'
sources = katpoint.Catalogue(add_specials=False)
sources.add(moon)
sources.add(off2)
sources.add(off1)
txtlist = ', '.join(["'%s'" % (target.name,) for target in sources])
user_logger.info("Calibration targets are [%s]", txtlist)
for target in sources:
session.nd_params = nd_off
for nd in [nd_coupler]:
session.nd_params = nd_off
session.track(target, duration=0) # get onto the source
user_logger.info("Now capturing data - diode %s on", nd['diode'])
session.label('%s' % (nd['diode'],))
if not session.fire_noise_diode(announce=True, **nd):
user_logger.error("Noise diode %s did not fire", nd['diode'])
session.nd_params = nd_off
user_logger.info("Now capturing data - noise diode off")
session.label('track')
session.track(target, duration=opts.track_duration)
if opts.max_duration and time.time() > start_time + opts.max_duration:
user_logger.info('Maximum script duration (%d s) exceeded, stopping script',
opts.max_duration)
def _set_dig_nd_(kat,
timestamp,
nd_setup=None,
switch=0,
cycle=False):
"""Setting and implementing digitiser noise diode command
Parameters
----------
kat : session kat container-like object
Container for accessing KATCP resources allocated to schedule block.
timestamp : float
Linux timestamp in seconds at which to switch noise diode
nd_setup : dict, optional (default = None, no pattern set)
Noise diode pattern setup, with keys:
'antennas': options are 'all', or 'm062', or ....,
'cycle_len': the cycle length [sec],
- must be less than 20 sec for L-band,
etc., etc.
switch : 0 or 1, optional (default = 0)
Switch all noise diodes off (0) or on (1)
Returns
-------
timestamp : float
Linux timestamp reported by digitiser
"""
if nd_setup is not None:
# selected antennas for nd pattern
nd_antennas = sorted(nd_setup['antennas'].split(","))
# nd pattern length [sec]
cycle_length = nd_setup['cycle_len']
# on fraction of pattern length [%]
on_fraction = nd_setup['on_frac']
msg = ('Repeat noise diode pattern every {} sec, '
'with {} sec on and apply pattern to {}'
.format(cycle_length,
float(cycle_length) * float(on_fraction),
nd_antennas))
user_logger.info(msg)
else:
nd_antennas = sorted(ant.name for ant in kat.ants)
cycle_length = 1.
on_fraction = switch
# Noise diodes trigger is evaluated per antenna
timestamps = []
for ant in nd_antennas:
ped = getattr(kat, ant)
reply = ped.req.dig_noise_source(timestamp,
on_fraction,
cycle_length)
if not kat.dry_run:
timestamps.append(_katcp_reply_({ant: reply}))
else:
msg = ('Dry-run: Set noise diode for antenna {} at '
'timestamp {}'.format(ant, timestamp))
user_logger.debug(msg)
if cycle:
# add time [sec] to ensure all digitisers set at the same time
timestamp += cycle_length * on_fraction
# assuming ND for all antennas must be the same
# only display single timestamp
if not kat.dry_run:
# test incorrect reply check
if len(timestamps) < len(nd_antennas):
err_msg = 'Noise diode activation not in sync'
user_logger.error(err_msg)
timestamp = np.mean(timestamps)
msg = ('Set all noise diodes with timestamp {} ({})'
.format(int(timestamp),
time.ctime(timestamp)))
user_logger.debug('DEBUG: {}'.format(msg))
return timestamp
off2_azel.radec()[1])
off2.antenna = antenna
off2.name = 'off2'
sources = katpoint.Catalogue(add_specials=False)
sources.add(moon)
sources.add(off2)
sources.add(off1)
txtlist = ', '.join(
["'%s'" % (target.name, ) for target in sources])
user_logger.info("Calibration targets are [%s]" % (txtlist))
for target in sources:
session.nd_params = nd_off
for nd in [nd_coupler]:
session.nd_params = nd_off
session.track(target, duration=0) # get onto the source
user_logger.info("Now capturing data - diode %s on" %
nd['diode'])
session.label('%s' % (nd['diode']))
if not session.fire_noise_diode(announce=True, **nd):
user_logger.error(
"Noise Diode did not Fire , (%s did not fire)" %
nd['diode'])
session.nd_params = nd_off
user_logger.info("Now capturing data - noise diode off")
session.label('track')
session.track(target, duration=opts.track_duration)
if opts.max_duration and time.time() > start_time + opts.max_duration:
user_logger.info(
'Maximum script duration (%d s) exceeded, stopping script' %
(opts.max_duration, ))
def run_observation(opts, kat):
"""Extract control and observation information provided in observation file."""
obs_plan_params = opts.obs_plan_params
# remove observation specific instructions housed in YAML file
del opts.obs_plan_params
# set up duration periods for observation control
obs_duration = -1
if "durations" in obs_plan_params:
if "obs_duration" in obs_plan_params["durations"]:
obs_duration = obs_plan_params["durations"]["obs_duration"]
# check for nonsensical observation duration setting
if abs(obs_duration) < 1e-5:
user_logger.error(
"Unexpected value: obs_duration: {}".format(obs_duration))
return
# TODO: the description requirement in sessions should be re-evaluated
# since the schedule block has the description
# Description argument in instruction_set should be retired, but is
# needed by sessions
# Assign proposal_description if available, else create a dummy
if "description" not in vars(opts):
session_opts = vars(opts)
description = "Observation run"
if "proposal_description" in vars(opts):
description = opts.proposal_description
session_opts["description"] = description
nr_obs_loops = len(obs_plan_params["observation_loop"])
with start_session(kat.array, **vars(opts)) as session:
session.standard_setup(**vars(opts))
# Each observation loop contains a number of observation cycles over LST ranges
# For a single observation loop, only a start LST and duration is required
# Target observation loop
observation_timer = time.time()
for obs_cntr, observation_cycle in enumerate(
obs_plan_params["observation_loop"]):
if nr_obs_loops > 1:
user_logger.info("Observation loop {} of {}.".format(
obs_cntr + 1, nr_obs_loops))
user_logger.info("Loop LST range {}.".format(
observation_cycle["LST"]))
# Unpack all target information
if not ("target_list" in observation_cycle.keys()):
user_logger.error(
"No targets provided - stopping script instead of hanging around"
)
continue
obs_targets = observation_cycle["target_list"]
target_list = obs_targets["target"].tolist()
# build katpoint catalogues for tidy handling of targets
catalogue = collect_targets(kat.array, target_list)
obs_tags = []
for tgt in obs_targets:
# catalogue names are no longer unique
name = tgt["name"]
# add tag evaluation to identify catalogue targets
tags = tgt["target"].split(",")[1].strip()
for cat_tgt in catalogue:
if name == cat_tgt.name:
if ("special" in cat_tgt.tags
or "xephem" in cat_tgt.tags
or tags == " ".join(cat_tgt.tags)):
tgt["target"] = cat_tgt
obs_tags.extend(cat_tgt.tags)
break
obs_tags = list(set(obs_tags))
cal_tags = [tag for tag in obs_tags if tag[-3:] == "cal"]
# observer object handle to track the observation timing in a more user
# friendly way
# observer = catalogue._antenna.observer
ref_antenna = catalogue.antenna
observer = ref_antenna.observer
start_datetime = timestamp2datetime(time.time())
observer.date = ephem.Date(start_datetime)
user_logger.trace("TRACE: requested start time "
"({}) {}".format(
datetime2timestamp(start_datetime),
start_datetime))
user_logger.trace("TRACE: observer at start\n {}".format(observer))
# Only observe targets in valid LST range
if nr_obs_loops > 1 and obs_cntr < nr_obs_loops - 1:
[start_lst, end_lst] = get_lst(observation_cycle["LST"],
multi_loop=True)
if end_lst is None:
# for multi loop the end lst is required
raise RuntimeError(
'Multi-loop observations require end LST times')
next_obs_plan = obs_plan_params["observation_loop"][obs_cntr +
1]
[next_start_lst, next_end_lst] = get_lst(next_obs_plan["LST"])
user_logger.trace("TRACE: current LST range {}-{}".format(
ephem.hours(str(start_lst)), ephem.hours(str(end_lst))))
user_logger.trace("TRACE: next LST range {}-{}".format(
ephem.hours(str(next_start_lst)),
ephem.hours(str(next_end_lst))))
else:
next_start_lst = None
next_end_lst = None
[start_lst, end_lst] = get_lst(observation_cycle["LST"])
# Verify the observation is in a valid LST range
# and that it is worth while continuing with the observation
# Do not use float() values, ephem.hours does not convert as
# expected
local_lst = observer.sidereal_time()
user_logger.trace("TRACE: Local LST {}".format(
ephem.hours(local_lst)))
# Only observe targets in current LST range
log_msg = "Local LST outside LST range {}-{}".format(
ephem.hours(str(start_lst)), ephem.hours(str(end_lst)))
if float(start_lst) < end_lst:
# lst ends before midnight
if not _same_day(start_lst, end_lst, local_lst):
if obs_cntr < nr_obs_loops - 1:
user_logger.info(log_msg)
else:
user_logger.error(log_msg)
continue
else:
# lst ends after midnight
if _next_day(start_lst, end_lst, local_lst):
if obs_cntr < nr_obs_loops - 1:
user_logger.info(log_msg)
else:
user_logger.error(log_msg)
continue
# Verify that it is worth while continuing with the observation
# The filter functions uses the current time as timestamps
# and thus incorrectly set the simulation timestamp
if not kat.array.dry_run:
# Quit early if there are no sources to observe
if len(catalogue.filter(el_limit_deg=opts.horizon)) == 0:
raise NoTargetsUpError(
"No targets are currently visible - "
"please re-run the script later")
# Quit early if the observation requires all targets to be visible
if opts.all_up and (len(
catalogue.filter(el_limit_deg=opts.horizon)) !=
len(catalogue)):
raise NotAllTargetsUpError(
"Not all targets are currently visible - please re-run the script"
"with --visibility for information")
# List sources and their associated functions from observation tags
not_cals_filter_list = []
for cal_type in cal_tags:
not_cals_filter_list.append("~{}".format(cal_type))
cal_array = [cal.name for cal in catalogue.filter(cal_type)]
if len(cal_array) < 1:
continue # do not display empty tags
user_logger.info("{} calibrators are {}".format(
str.upper(cal_type[:-3]), cal_array))
user_logger.info("Observation targets are [{}]".format(", ".join([
repr(target.name)
for target in catalogue.filter(not_cals_filter_list)
])))
# TODO: setup of noise diode pattern should be moved to sessions
# so it happens in the line above
if "noise_diode" in obs_plan_params:
nd_setup = obs_plan_params["noise_diode"]
nd_lead = nd_setup.get('lead_time')
# Set noise diode period to multiple of correlator integration time.
if not kat.array.dry_run:
cbf_corr = session.cbf.correlator
dump_period = cbf_corr.sensor.int_time.get_value()
else:
dump_period = 0.5 # sec
user_logger.debug(
'DEBUG: Correlator integration time {} [sec]'.format(
dump_period))
if "cycle_len" in nd_setup:
if (nd_setup['cycle_len'] >= dump_period):
cycle_len_frac = nd_setup['cycle_len'] // dump_period
nd_setup['cycle_len'] = cycle_len_frac * dump_period
msg = ('Set noise diode period '
'to multiple of correlator dump period: '
'cycle length = {} [sec]'.format(
nd_setup['cycle_len']))
else:
msg = ('Requested cycle length {}s '
'< correlator dump period {}s, '
'ND not synchronised with dump edge'.format(
nd_setup['cycle_len'], dump_period))
user_logger.warning(msg)
noisediode.pattern(
kat.array,
nd_setup,
lead_time=nd_lead,
)
# Adding explicit init after "Capture-init failed" exception was
# encountered
session.capture_init()
user_logger.debug("DEBUG: Initialise capture start with timestamp "
"{} ({})".format(int(time.time()),
timestamp2datetime(
time.time())))
# Go to first target before starting capture
user_logger.info("Slewing to first target")
observe(session, ref_antenna, obs_targets[0], slewonly=True)
# Only start capturing once we are on target
session.capture_start()
user_logger.trace("TRACE: capture start time after slew "
"({}) {}".format(time.time(),
timestamp2datetime(
time.time())))
user_logger.trace(
"TRACE: observer after slew\n {}".format(observer))
done = False
sanity_cntr = 0
while not done:
# small errors can cause an infinite loop here
# preventing infinite loops
sanity_cntr += 1
if sanity_cntr > 100000:
user_logger.error("While limit counter has reached {}, "
"exiting".format(sanity_cntr))
break
# Cycle through target list in order listed
targets_visible = False
time_remaining = obs_duration
observation_timer = time.time()
for tgt_cntr, target in enumerate(obs_targets):
katpt_target = target["target"]
user_logger.debug("DEBUG: {} {}".format(tgt_cntr, target))
user_logger.trace(
"TRACE: initial observer for target\n {}".format(
observer))
# check target visible before doing anything
# make sure the target would be visible for the entire duration
target_duration = target['duration']
visible = True
if type(katpt_target.body) is ephem.FixedBody:
visible = above_horizon(
target=katpt_target.body.copy(),
observer=observer.copy(),
horizon=opts.horizon,
duration=target_duration)
if not visible:
show_horizon_status = True
# warning for cadence targets only when they are due
if (target["cadence"] > 0
and target["last_observed"] is not None):
delta_time = time.time() - target["last_observed"]
show_horizon_status = delta_time >= target[
"cadence"]
if show_horizon_status:
user_logger.warn("Target {} below {} deg horizon, "
"continuing".format(
target["name"], opts.horizon))
continue
user_logger.trace(
"TRACE: observer after horizon check\n {}".format(
observer))
# check and observe all targets with cadences
while_cntr = 0
cadence_targets = list(obs_targets)
while True:
tgt = cadence_target(cadence_targets)
if not tgt:
break
# check enough time remaining to continue
if obs_duration > 0 and time_remaining < tgt[
"duration"]:
done = True
break
# check target visible before doing anything
user_logger.trace("TRACE: cadence"
"target\n{}\n {}".format(
tgt, catalogue[tgt["name"]]))
user_logger.trace("TRACE: initial observer for cadence"
"target\n {}".format(observer))
user_logger.trace(
"TRACE: observer before track\n {}".format(
observer))
user_logger.trace(
"TRACE: target observation # {} last observed "
"{}".format(tgt["obs_cntr"], tgt["last_observed"]))
cat_target = catalogue[tgt["name"]]
if above_horizon(
target=cat_target.body,
observer=cat_target.antenna.observer.copy(),
horizon=opts.horizon,
duration=tgt["duration"]):
if observe(session, ref_antenna, tgt,
**obs_plan_params):
targets_visible += True
tgt["obs_cntr"] += 1
tgt["last_observed"] = time.time()
else:
# target not visibile to sessions anymore
cadence_targets.remove(tgt)
user_logger.trace(
"TRACE: observer after track\n {}".format(
observer))
user_logger.trace(
"TRACE: target observation # {} last observed "
"{}".format(tgt["obs_cntr"],
tgt["last_observed"]))
else:
cadence_targets.remove(tgt)
while_cntr += 1
if while_cntr > len(obs_targets):
break
if done:
break
user_logger.trace(
"TRACE: observer after cadence\n {}".format(observer))
# observe non cadence target
if target["cadence"] < 0:
user_logger.trace(
"TRACE: normal target\n {}".format(target))
user_logger.trace(
"TRACE: observer before track\n {}".format(
observer))
user_logger.trace("TRACE: ts before observe {}".format(
time.time()))
user_logger.trace("TRACE: target last "
"observed {}".format(
target["last_observed"]))
targets_visible += observe(session, ref_antenna,
target, **obs_plan_params)
user_logger.trace(
"TRACE: observer after track\n {}".format(
observer))
user_logger.trace("TRACE: ts after observe {}".format(
time.time()))
if targets_visible:
target["obs_cntr"] += 1
target["last_observed"] = time.time()
user_logger.trace(
"TRACE: target observation # {} last observed "
"{}".format(target["obs_cntr"],
target["last_observed"]))
user_logger.trace(
"TRACE: observer after track\n {}".format(
observer))
# loop continuation checks
delta_time = time.time() - session.start_time
user_logger.trace(
"TRACE: time elapsed {} sec".format(delta_time))
user_logger.trace(
"TRACE: total obs duration {} sec".format(
obs_duration))
if obs_duration > 0:
time_remaining = obs_duration - delta_time
user_logger.trace(
"TRACE: time remaining {} sec".format(
time_remaining))
next_target = obs_targets[(tgt_cntr + 1) %
len(obs_targets)]
user_logger.trace("TRACE: next target before cadence "
"check:\n{}".format(next_target))
# check if there is a cadence target that must be run
# instead of next target
for next_cadence_tgt_idx in range(
tgt_cntr + 1, len(obs_targets)):
next_cadence_target = obs_targets[
next_cadence_tgt_idx % len(obs_targets)]
if next_cadence_target["cadence"] > 0:
user_logger.trace(
"TRACE: time needed for next obs "
"{} sec".format(
next_cadence_target["cadence"]))
next_target = obs_targets[next_cadence_tgt_idx
% len(obs_targets)]
continue
user_logger.trace("TRACE: next target after cadence "
"check:\n{}".format(next_target))
user_logger.trace("TRACE: time needed for next obs "
"{} sec".format(
next_target["duration"]))
if (time_remaining < 1.0
or time_remaining < next_target["duration"]):
user_logger.info(
"Scheduled observation time lapsed - ending observation"
)
done = True
break
# during dry-run when sessions exit time is reset so will be incorrect
# outside the loop
observation_timer = time.time()
if obs_duration < 0:
user_logger.info(
"Observation list completed - ending observation")
done = True
# for multiple loop, check start lst of next loop
if next_start_lst is not None:
check_local_lst = observer.sidereal_time()
if (check_local_lst > next_start_lst) or (not _next_day(
next_start_lst, next_end_lst, check_local_lst)):
user_logger.info("Moving to next LST loop")
done = True
# End if there is nothing to do
if not targets_visible:
user_logger.warning(
"No more targets to observe - stopping script "
"instead of hanging around")
done = True
user_logger.trace("TRACE: observer at end\n {}".format(observer))
# display observation cycle statistics
# currently only available for single LST range observations
if nr_obs_loops < 2:
print
user_logger.info("Observation loop statistics")
total_obs_time = observation_timer - session.start_time
if obs_duration < 0:
user_logger.info("Single run through observation target list")
else:
user_logger.info("Desired observation time {:.2f} sec "
"({:.2f} min)".format(obs_duration,
obs_duration / 60.0))
user_logger.info("Total observation time {:.2f} sec "
"({:.2f} min)".format(total_obs_time,
total_obs_time / 60.0))
if len(obs_targets) > 0:
user_logger.info("Targets observed :")
for unique_target in np.unique(obs_targets["name"]):
cntrs = obs_targets[obs_targets["name"] ==
unique_target]["obs_cntr"]
durations = obs_targets[obs_targets["name"] ==
unique_target]["duration"]
if np.isnan(durations).any():
user_logger.info("{} observed {} times".format(
unique_target, np.sum(cntrs)))
else:
user_logger.info("{} observed for {} sec".format(
unique_target, np.sum(cntrs * durations)))
print
if opts.ap in [ant.name]:
receptor = ant
if receptor is None:
raise RuntimeError("Receptor under test is not in controlled array")
# Set sensor strategies"
kat.ants.set_sampling_strategy("lock", "event")
kat.ants.set_sampling_strategy("ap.indexer-position", "event")
if not kat.dry_run and receptor.req.mode('STOP'):
user_logger.info("Setting Antenna Mode to 'STOP', "
"Powering on Antenna Drives.")
time.sleep(2)
else:
if not kat.dry_run:
user_logger.error("Unable to set Antenna mode to 'STOP'.")
for taz, tel, band in targetlist:
for i in range(int(opts.num_repeat)):
target = katpoint.Target('Name, azel, %s, %s' % (taz, tel))
track(receptor,
target,
ridx_position=band,
duration=opts.dwell_time,
dry_run=kat.dry_run)
user_logger.info("Elevation: '%s' "
"Patterns attempted: '%s' "
"Contractual cycles: '%s'." % (tel, i + 1, 11 *
(i + 1)))
"Please specify at least one target argument via name ('Cygnus A'), "
"description ('azel, 20, 30') or catalogue file name ('sources.csv')")
# Check basic command-line options and obtain a kat object connected to the appropriate system
with verify_and_connect(opts) as kat:
targets = collect_targets(kat, args)
# Initialise a capturing session (which typically opens an HDF5 file)
with start_session(kat, **vars(opts)) as session:
# Use the command-line options to set up the system
session.standard_setup(**vars(opts))
if not opts.no_delays and not kat.dry_run:
if session.dbe.req.auto_delay('on'):
user_logger.info("Turning on delay tracking.")
else:
user_logger.error('Unable to turn on delay tracking.')
elif opts.no_delays and not kat.dry_run:
if session.dbe.req.auto_delay('off'):
user_logger.info("Turning off delay tracking.")
else:
user_logger.error('Unable to turn off delay tracking.')
if session.dbe.req.zero_delay():
user_logger.info("Zeroed the delay values.")
else:
user_logger.error('Unable to zero delay values.')
all_ants = session.ants
# Form scanning antenna subarray (or pick the first antenna as the default scanning antenna)
scan_ants = ant_array(
kat, opts.scan_ants if opts.scan_ants else session.ants[0],
'scan_ants')
def track(ant, target, ridx_position='l', duration=10, dry_run=False):
# TODO: make the indexer timeout configurable parameter
indexer_timeout = 120
ant.req.mode('STOP')
if not dry_run:
# Added sleep to wait for AP brakes to engage
time.sleep(2)
result = wait_until_sensor_equals(5.0, ant.name + '_mode', 'STOP')
if result[0] == False:
user_logger.error("Failed to set AP to 'STOP' mode. "
"Indexer commands will not be processed.")
return
user_logger.info("Setting initial RI on %s to position : %s " %
(ant.name, ridx_position.upper()))
ant.req.ap_set_indexer_position(ridx_position)
if not dry_run:
result = wait_until_sensor_equals(indexer_timeout,
ant.name + '_ap_indexer_position',
ridx_position)
else:
result = (True, ridx_position)
if result[0] == False:
ridx_position_raw = kat.sensors.get(
ant.name + '_ap_indexer_position_raw', None).get_value()
user_logger.error(
"Timed out while waiting %s seconds for "
"indexer to reach '%s' position. "
"Last position reading was %s degrees." %
(indexer_timeout, ridx_position.upper(), ridx_position_raw))
# TODO: make this sequence easier to configure
ridx_sequence = [
'u', 'l', 'x', 's', 'l', 'u', 's', 'x', 'u', 'l', 's', 'x', 'l', 'u',
'x', 's', 'u', 'x', 'l', 's', 'l', 's'
]
# Cycling indexer positions
if not dry_run:
for pos in ridx_sequence:
ridx_last_position = kat.sensors.get(
ant.name + '_ap_indexer_position', None).get_value()
ridx_movement_start_time = time.time()
user_logger.info("--- Moving RI to position: '%s' ---" %
pos.upper())
ant.req.ap_set_indexer_position(pos)
result = wait_until_sensor_equals(
indexer_timeout, ant.name + '_ap_indexer_position', pos)
user_logger.debug("Request result: '%s', "
"last sensor reading: '%s'" %
(result[0], result[1]))
if result[0] == False:
ridx_position_raw = kat.sensors.get(
ant.name + '_ap_indexer_position_raw', None).get_value()
ridx_brakes_released = kat.sensors.get(
ant.name + '_ap_ridx_brakes_released', None).get_value()
user_logger.error("Timed out while waiting %s seconds "
"for indexer to reach '%s' position. "
"Last position reading was %s degrees. "
"Brakes released: '%s'. " %
(indexer_timeout, pos.upper(),
ridx_position_raw, ridx_brakes_released))
ridx_current_position = kat.sensors.get(
ant.name + '_ap_indexer_position', None).get_value()
time_to_index = time.time() - ridx_movement_start_time
if ridx_current_position in ['undefined']:
user_logger.warning("Movement ended in undefined position")
else:
user_logger.info(
"RIDX from '%s' to '%s' position "
"took '%s' seconds." %
(ridx_last_position.upper(), ridx_current_position.upper(),
time_to_index))
# 60 seconds comes from the antenna specification
if (time_to_index > 60.0):
user_logger.warning("Indexer took longer than 60 seconds!")
user_logger.info("Dwell for %s seconds before "
"going to next position." % duration)
time.sleep(duration)
user_logger.info("Pattern complete. Heading to next sky target.")
