moon = kat.sources.lookup['moon']
with start_session(kat, **vars(opts)) as session:
session.standard_setup(**vars(opts))
session.nd_params = nd_off
session.capture_start()
once = True
start_time = time.time()
while once or time.time() < start_time + opts.max_duration:
once = False
moon = katpoint.Target('Moon, special')
antenna = katpoint.Antenna(
'ant1, -30:43:17.3, 21:24:38.5, 1038.0, 12.0, 18.4 -8.7 0.0, -0:05:30.6 0 -0:00:03.3 0:02:14.2 0:00:01.6 -0:01:30.6 0:08:42.1, 1.22'
) # find some way of getting this from session
moon.antenna = antenna
off1_azel = katpoint.construct_azel_target(
wrap_angle(moon.azel()[0] + np.radians(10)),
moon.azel()[1])
off1_azel.antenna = antenna
off1 = katpoint.construct_radec_target(off1_azel.radec()[0],
off1_azel.radec()[1])
off1.antenna = antenna
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'
def calc_pointing_offsets(session, beams, target, middle_time, temperature,
pressure, humidity):
"""Calculate pointing offsets per receptor based on primary beam fits.
Parameters
----------
session : :class:`katcorelib.observe.CaptureSession` object
The active capture session
beams : dict mapping receptor name to list of :class:`BeamPatternFit`
Fitted primary beams, per receptor and per frequency chunk
target : :class:`katpoint.Target` object
The target on which offset pointings were done
middle_time : float
Unix timestamp at the middle of sequence of offset pointings, used to
find the mean location of a moving target (and reference for weather)
temperature, pressure, humidity : float
Atmospheric conditions at middle time, used for refraction correction
Returns
-------
pointing_offsets : dict mapping receptor name to offset data (10 floats)
Pointing offsets per receptor in degrees, stored as a sequence of
- requested (az, el) after refraction (input to the pointing model),
- full (az, el) offset, including contributions of existing pointing
model, any existing adjustment and newly fitted adjustment
(useful for fitting new pointing models as it is independent),
- full (az, el) adjustment on top of existing pointing model,
replacing any existing adjustment (useful for reference pointing),
- relative (az, el) adjustment on top of existing pointing model and
adjustment (useful for verifying reference pointing), and
- rough uncertainty (standard deviation) of (az, el) adjustment.
"""
pointing_offsets = {}
# Iterate over receptors
for ant in sorted(session.observers):
beams_freq = beams.get(ant.name, [])
beams_freq = [b for b in beams_freq if b is not None and b.is_valid]
if not beams_freq:
user_logger.debug("%s had no valid primary beam fitted", ant.name)
continue
offsets_freq = np.array([b.center for b in beams_freq])
offsets_freq_std = np.array([b.std_center for b in beams_freq])
weights_freq = 1. / offsets_freq_std**2
# Do weighted average of offsets over frequency chunks
results = np.average(offsets_freq,
axis=0,
weights=weights_freq,
returned=True)
pointing_offset = results[0]
pointing_offset_std = np.sqrt(1. / results[1])
user_logger.debug("%s x=%+7.2f'+-%.2f\" y=%+7.2f'+-%.2f\"", ant.name,
pointing_offset[0] * 60,
pointing_offset_std[0] * 3600,
pointing_offset[1] * 60,
pointing_offset_std[1] * 3600)
# Get existing pointing adjustment
receptor = getattr(session.kat, ant.name)
az_adjust = receptor.sensor.pos_adjust_pointm_azim.get_value()
el_adjust = receptor.sensor.pos_adjust_pointm_elev.get_value()
existing_adjustment = deg2rad(np.array((az_adjust, el_adjust)))
# Start with requested (az, el) coordinates, as they apply
# at the middle time for a moving target
requested_azel = target.azel(timestamp=middle_time, antenna=ant)
# Correct for refraction, which becomes the requested value
# at input of pointing model
rc = RefractionCorrection()
def refract(az, el): # noqa: E306, E301
"""Apply refraction correction as at the middle of scan."""
return [az, rc.apply(el, temperature, pressure, humidity)]
refracted_azel = np.array(refract(*requested_azel))
# More stages that apply existing pointing model and/or adjustment
pointed_azel = np.array(ant.pointing_model.apply(*refracted_azel))
adjusted_azel = pointed_azel + existing_adjustment
# Convert fitted offset back to spherical (az, el) coordinates
pointing_offset = deg2rad(np.array(pointing_offset))
beam_center_azel = target.plane_to_sphere(*pointing_offset,
timestamp=middle_time,
antenna=ant)
# Now correct the measured (az, el) for refraction and then apply the
# existing pointing model and adjustment to get a "raw" measured
# (az, el) at the output of the pointing model stage
beam_center_azel = refract(*beam_center_azel)
beam_center_azel = ant.pointing_model.apply(*beam_center_azel)
beam_center_azel = np.array(beam_center_azel) + existing_adjustment
# Make sure the offset is a small angle around 0 degrees
full_offset_azel = wrap_angle(beam_center_azel - refracted_azel)
full_adjust_azel = wrap_angle(beam_center_azel - pointed_azel)
relative_adjust_azel = wrap_angle(beam_center_azel - adjusted_azel)
# Cheap 'n' cheerful way to convert cross-el uncertainty to azim form
offset_azel_std = pointing_offset_std / \
np.array([np.cos(refracted_azel[1]), 1.])
# We store all variants of the pointing offset since we have it all
# at our fingertips here
point_data = np.r_[rad2deg(refracted_azel),
rad2deg(full_offset_azel),
rad2deg(full_adjust_azel),
rad2deg(relative_adjust_azel), offset_azel_std]
pointing_offsets[ant.name] = point_data
return pointing_offsets
# Start capture session, which creates HDF5 file
with start_session(kat, **vars(opts)) as session:
session.standard_setup(**vars(opts))
session.capture_start()
start_time = time.time()
targets_observed = []
# Keep going until the time is up
keep_going = True
while keep_going:
keep_going = (opts.max_duration is not None) and opts.repeat
targets_before_loop = len(targets_observed)
# Iterate through source list, picking the next one that is up
for target in observation_sources.iterfilter(el_limit_deg=opts.horizon):
target_future_azel = target.azel(timestamp=time.time()+opts.track_duration/2)
target = katpoint.construct_azel_target(katpoint.wrap_angle(target_future_azel[0]),katpoint.wrap_angle(target_future_azel[1]))
session.label('track')
user_logger.info("Initiating %g-second drift scan on target '%s'" % (opts.track_duration, target.name,))
# Split the total track on one target into segments lasting as long as the noise diode period
# This ensures the maximum number of noise diode firings
total_track_time = 0.
while total_track_time < opts.track_duration:
next_track = opts.track_duration - total_track_time
# Cut the track short if time ran out
if opts.max_duration is not None:
next_track = min(next_track, opts.max_duration - (time.time() - start_time))
if opts.nd_params['period'] > 0:
next_track = min(next_track, opts.nd_params['period'])
if next_track <= 0 or not session.track(target, duration=next_track, announce=False):
break
total_track_time += next_track
if not kat.dry_run and kat.ants.req.mode('STOP') :
user_logger.info("Setting Antenna Mode to 'STOP', Powering on Antenna Drives.")
time.sleep(10)
else:
if not kat.dry_run :
user_logger.error("Unable to set Antenna mode to 'STOP'.")
once = True
start_time = time.time()
while once or time.time() < start_time + opts.max_duration :
once = False
moon = katpoint.Target('Moon, special')
antenna = katpoint.Antenna('ant1, -30:43:17.3, 21:24:38.5, 1038.0, 12.0, 18.4 -8.7 0.0, -0:05:30.6 0 -0:00:03.3 0:02:14.2 0:00:01.6 -0:01:30.6 0:08:42.1, 1.22') # find some way of getting this from session
moon.antenna = antenna
off1_azel = katpoint.construct_azel_target(wrap_angle(moon.azel()[0] + np.radians(10) ),moon.azel()[1] )
off1_azel.antenna = antenna
off1 = katpoint.construct_radec_target(off1_azel.radec()[0],off1_azel.radec()[1])
off1.antenna = antenna
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])
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
katpoint.rad2deg(dec))
Ntarget = katpoint.construct_radec_target(ra, dec2)
Ntarget.antenna = bf_ants
Ntarget.name = target_name + '_R'
target = Ntarget
print target
print target.name
# Get onto beamformer target
session.track(target, duration=5)
# Perform a drift scan if selected
if opts.drift_scan:
transit_time = katpoint.Timestamp() + opts.target_duration / 2.0
# Stationary transit point becomes new target
az, el = target.azel(timestamp=transit_time)
target = katpoint.construct_azel_target(katpoint.wrap_angle(az),
el)
# Go to transit point so long
session.track(target, duration=0)
# Only start capturing once we are on target
session.capture_start()
print "sleeping 10 secs, will be removed later in dpc is not asynchronous"
time.sleep(10)
# for targets in list
print "kat.ptuse_1.req.ptuse_target_start (" + data_product_id + ", " + beam_id + ", " + target.name + ")"
reply = kat.ptuse_1.req.ptuse_target_start(data_product_id, beam_id,
target.name)
print "kat.ptuse_1.req.ptuse_target_start returned " + str(reply)
def fit_pointing_model(filename, opts):
# declare the globals to update their values
global az
global el
global measured_delta_az
global measured_delta_el
global std_delta_az
global std_delta_el
global keep
# These fields contain strings, while the rest of the fields are assumed to contain floats
string_fields = ['dataset', 'target', 'timestamp_ut', 'data_unit']
# Load old pointing model, if given
old_model = None
if opts.pmfilename:
try:
old_model = katpoint.PointingModel(file(opts.pmfilename).readline())
print("Loaded %d-parameter pointing model from '%s'" % (len(old_model), opts.pmfilename))
except IOError:
raise RuntimeError("Could not load old pointing model from '%s'" % (opts.pmfilename,))
# Load data file in one shot as an array of strings
data = np.loadtxt(filename, dtype='string', comments='#', delimiter=', ')
# Interpret first non-comment line as header
fields = data[0].tolist()
# By default, all fields are assumed to contain floats
formats = np.tile(np.float, len(fields))
# The string_fields are assumed to contain strings - use data's string type, as it is of sufficient length
formats[[fields.index(name) for name in string_fields if name in fields]] = data.dtype
# Convert to heterogeneous record array
data = np.rec.fromarrays(data[1:].transpose(), dtype=list(zip(fields, formats)))
# Load antenna description string from first line of file and construct antenna object from it
antenna = katpoint.Antenna(file(filename).readline().strip().partition('=')[2])
# Use the pointing model contained in antenna object as the old model (if not overridden by file)
# If the antenna has no model specified, a default null model will be used
if old_model is None:
old_model = antenna.pointing_model
# Obtain desired fields and convert to radians
az, el = wrap_angle(deg2rad(data['azimuth'])), deg2rad(data['elevation'])
measured_delta_az, measured_delta_el = deg2rad(data['delta_azimuth']), deg2rad(data['delta_elevation'])
# Uncertainties are optional
min_std = deg2rad(opts.min_rms / 60. / np.sqrt(2))
std_delta_az = np.clip(deg2rad(data['delta_azimuth_std']), min_std, np.inf) \
if 'delta_azimuth_std' in data.dtype.fields and opts.use_stats else np.tile(min_std, len(az))
std_delta_el = np.clip(deg2rad(data['delta_elevation_std']), min_std, np.inf) \
if 'delta_elevation_std' in data.dtype.fields and opts.use_stats else np.tile(min_std, len(el))
targets = data['target']
keep = data['keep'].astype(np.bool) if 'keep' in data.dtype.fields else np.tile(True, len(targets))
# List of unique targets in data set and target index for each data point
unique_targets = np.unique(targets).tolist()
target_index = np.array([unique_targets.index(t) for t in targets])
# Initialise new pointing model and set default enabled parameters
new_model = katpoint.PointingModel()
num_params = len(new_model)
default_enabled = np.nonzero(list(old_model.values()))[0]
# If the old model is empty / null, select the most basic set of parameters for starters
if len(default_enabled) == 0:
default_enabled = np.array([1, 3, 4, 5, 6, 7]) - 1
enabled_params = np.tile(False, num_params)
enabled_params[default_enabled] = True
enabled_params = enabled_params.tolist()
old = PointingResults(old_model)
new = PointingResults(new_model)
# Fit new pointing model and update results
params, sigma_params = new_model.fit(az[keep], el[keep], measured_delta_az[keep], measured_delta_el[keep],
std_delta_az[keep], std_delta_el[keep], enabled_params)
new.update(new_model)
# Axis limit to be applied to all residual plots
resid_lim = 1.2 * old.abs_sky_error.max()
# Save pointing model to file
outfile = file(opts.outfilebase + '.csv', 'w')
# The original pointing model description string was comma-separated
outfile.write(new_model.description.replace(" ", ", "))
outfile.close()
print("Saved %d-parameter pointing model to '%s'" % (len(new_model), opts.outfilebase + '.csv'))
# Turn data recarray into list of dicts and add residuals to the mix
extended_data = []
for n in range(len(data)):
rec_dict = dict(list(zip(data.dtype.names, data[n])))
rec_dict['keep'] = int(keep[n])
rec_dict['old_residual_xel'] = rad2deg(old.residual_xel[n])
rec_dict['old_residual_el'] = rad2deg(old.residual_el[n])
rec_dict['new_residual_xel'] = rad2deg(new.residual_xel[n])
rec_dict['new_residual_el'] = rad2deg(new.residual_el[n])
extended_data.append(rec_dict)
# Format the data similar to analyse_point_source_scans output CSV file, with four new columns at the end
fields = '%(dataset)s, %(target)s, %(timestamp_ut)s, %(azimuth).7f, %(elevation).7f, ' \
'%(delta_azimuth).7f, %(delta_azimuth_std).7f, %(delta_elevation).7f, %(delta_elevation_std).7f, ' \
'%(data_unit)s, %(beam_height_I).7f, %(beam_height_I_std).7f, %(beam_width_I).7f, ' \
'%(beam_width_I_std).7f, %(baseline_height_I).7f, %(baseline_height_I_std).7f, %(refined_I).0f, ' \
'%(beam_height_HH).7f, %(beam_width_HH).7f, %(baseline_height_HH).7f, %(refined_HH).0f, ' \
'%(beam_height_VV).7f, %(beam_width_VV).7f, %(baseline_height_VV).7f, %(refined_VV).0f, ' \
'%(frequency).7f, %(flux).4f, %(temperature).2f, %(pressure).2f, %(humidity).2f, %(wind_speed).2f, ' \
'%(keep)d, %(old_residual_xel).7f, %(old_residual_el).7f, %(new_residual_xel).7f, %(new_residual_el).7f\n'
field_names = [name.partition(')')[0] for name in fields[2:].split(', %(')]
# Save residual data and flags to file
outfile2 = file(opts.outfilebase + '_data.csv', 'w')
outfile2.write('# antenna = %s\n' % antenna.description)
outfile2.write(', '.join(field_names) + '\n')
outfile2.writelines([fields % rec for rec in extended_data])
outfile2.close()
# Pointing model report
print('Generating report, this may take a few minutes...')
nice_filename = os.path.splitext(os.path.basename(filename))[0]+ '_pointing_model'
pp = PdfPages(nice_filename+'.pdf')
pagetext = []
i = 0
tmpstr = ""
linelength = 5
pagetext.append("List of targets used:")
for tar in list(set(unique_targets)):
if i % linelength == linelength-1 :
pagetext.append(tmpstr)
tmpstr = ""
i = i + 1
tmpstr +='%s, '%(tar)
pagetext.append(tmpstr)
pagetext.append("Pointing metrics for fitted points. (N= %i Fitting Data Points) "%(np.sum(keep)))
pagetext.append("New Pointing model:")
pagetext.append(new_model.description.replace(" ", ", "))
pagetext.append("All sky RMS = %.3f' (robust %.3f') " % (new.sky_rms, new.robust_sky_rms))
fig = plt.figure(None,figsize = (10,16))
plt.figtext(0.1,0.1,'\n'.join(pagetext),fontsize=12)
fig.savefig(pp,format='pdf')
plt.close(fig)
# List of colors used to represent different targets in scatter plots
scatter_colors = ('b', 'r', 'g', 'k', 'c', 'm', 'y')
target_colors = np.tile(scatter_colors, 1 + len(unique_targets) // len(scatter_colors))[:len(unique_targets)]
# Quantity loosely related to the declination of the source
north = (np.pi / 2. - el) / (np.pi / 2.) * np.cos(az)
pseudo_dec = -np.ones(len(unique_targets))
for n, ind in enumerate(target_index):
if north[n] > pseudo_dec[ind]:
pseudo_dec[ind] = north[n]
north_to_south = np.flipud(np.argsort(pseudo_dec))
target_colors = target_colors[north_to_south][target_index]
for idx in np.unique(target_index):
fig = plt.figure(1, figsize=(15, 10))
fig.clear()
# Store highlighted target index on figure object
fig.highlighted_target = idx
# Axes to contain detail residual plots - initialise plots with old residuals
ax = fig.add_axes([0.27, 0.74, 0.2, 0.2])
ax.axhline(0, color='k', zorder=0)
plot_data_and_tooltip(ax, rad2deg(az), rad2deg(old.residual_xel) * 60.)
ax.axis([-180., 180., -resid_lim, resid_lim])
ax.set_xticks([])
ax.yaxis.set_ticks_position('right')
ax.yaxis.set_major_formatter(mpl.ticker.FuncFormatter(arcmin_formatter))
ax.set_ylabel('Cross-EL offset')
ax.set_title('RESIDUALS')
ax = fig.add_axes([0.27, 0.54, 0.2, 0.2])
ax.axhline(0, color='k', zorder=0)
plot_data_and_tooltip(ax, rad2deg(az), rad2deg(old.residual_el) * 60.)
ax.axis([-180., 180., -resid_lim, resid_lim])
ax.set_xlabel('Azimuth (deg)')
ax.yaxis.set_ticks_position('right')
ax.yaxis.set_major_formatter(mpl.ticker.FuncFormatter(arcmin_formatter))
ax.set_ylabel('EL offset')
ax = fig.add_axes([0.27, 0.26, 0.2, 0.2])
ax.axhline(0, color='k', zorder=0)
plot_data_and_tooltip(ax, rad2deg(el), rad2deg(old.residual_xel) * 60.)
ax.axis([0., 90., -resid_lim, resid_lim])
ax.set_xticks([])
ax.yaxis.set_ticks_position('right')
ax.yaxis.set_major_formatter(mpl.ticker.FuncFormatter(arcmin_formatter))
ax.set_ylabel('Cross-EL offset')
ax = fig.add_axes([0.27, 0.06, 0.2, 0.2])
ax.axhline(0, color='k', zorder=0)
plot_data_and_tooltip(ax, rad2deg(el), rad2deg(old.residual_el) * 60.)
ax.axis([0., 90., -resid_lim, resid_lim])
ax.set_xlabel('Elevation (deg)')
ax.yaxis.set_ticks_position('right')
ax.yaxis.set_major_formatter(mpl.ticker.FuncFormatter(arcmin_formatter))
ax.set_ylabel('EL offset')
# Axes to contain quiver plot - plot static measurement locations in ARC projection as a start
ax = fig.add_axes([0.5, 0.43, 0.5, 0.5], projection='polar')
plot_data_and_tooltip(ax, np.pi/2. - az, np.pi/2. - el)
segms = quiver_segments(old.residual_az, old.residual_el, 0.)
ax.quiv = mpl.collections.LineCollection(segms, color='0.3')
ax.add_collection(ax.quiv)
ax.set_xticks(deg2rad(np.arange(0., 360., 90.)))
ax.set_xticklabels(['E', 'N', 'W', 'S'])
ax.yaxis.set_major_formatter(mpl.ticker.FuncFormatter(angle_formatter))
ax.set_ylim(0., np.pi / 2.)
ax.set_yticks(deg2rad(np.arange(0., 90., 10.)))
ax.set_yticklabels([])
# Axes to contain before/after residual plot
ax = fig.add_axes([0.5, 0.135, 0.25, 0.25], projection='polar')
ax.yaxis.set_major_formatter(mpl.ticker.FuncFormatter(arcmin_formatter))
plot_data_and_tooltip(ax, np.arctan2(old.residual_el, old.residual_xel), old.abs_sky_error)
ax.set_xticklabels([])
ax.set_title('OLD')
fig.text(0.625, 0.09, "$\chi^2$ = %.1f" % (old.chi2,), ha='center', va='baseline')
fig.text(0.625, 0.06, "all sky rms = %.3f' (robust %.3f')" % (old.sky_rms, old.robust_sky_rms),
ha='center', va='baseline')
old.metrics(target_index == fig.highlighted_target)
fig.text(0.625, 0.03, "target sky rms = %.3f' (robust %.3f')" % (old.sky_rms, old.robust_sky_rms),
ha='center', va='baseline', fontdict=dict(color=(0.25,0,0,1)))
old.metrics(keep)
ax = fig.add_axes([0.75, 0.135, 0.25, 0.25], projection='polar')
ax.yaxis.set_major_formatter(mpl.ticker.FuncFormatter(arcmin_formatter))
plot_data_and_tooltip(ax, np.arctan2(new.residual_el, new.residual_xel), new.abs_sky_error)
ax.set_xticklabels([])
ax.set_title('NEW')
fig.text(0.875, 0.09, "$\chi^2$ = %.1f" % (new.chi2,), ha='center', va='baseline')
fig.text(0.875, 0.06, "all sky rms = %.3f' (robust %.3f')" % (new.sky_rms, new.robust_sky_rms),
ha='center', va='baseline')
new.metrics(target_index == fig.highlighted_target)
fig.text(0.875, 0.03, "target sky rms = %.3f' (robust %.3f')" % (new.sky_rms, new.robust_sky_rms),
ha='center', va='baseline', fontdict=dict(color=(0.25,0,0,1)))
new.metrics(keep)
param_button_color = ['0.65', '0.0']
param_button_weight = ['normal', 'bold']
# For display purposes, throw out unused parameters P2 and P10
display_params = list(range(num_params))
display_params.pop(9)
display_params.pop(1)
def setup_param_button(p):
"""Set up individual parameter toggle button."""
param = display_params[p]
param_button = mpl.widgets.Button(fig.add_axes([0.09, 0.94 - (0.85 + p * 0.9) / len(display_params),
0.03, 0.85 / len(display_params)]), 'P%d' % (param + 1,))
fig.text(0.19, 0.94 - (0.5 * 0.85 + p * 0.9) / len(display_params), '', ha='right', va='center')
fig.text(0.24, 0.94 - (0.5 * 0.85 + p * 0.9) / len(display_params), '', ha='right', va='center')
state = enabled_params[param]
param_button.label.set_color(param_button_color[state])
param_button.label.set_weight(param_button_weight[state])
def toggle_param_callback(event):
state = not enabled_params[param]
enabled_params[param] = state
param_button.label.set_color(param_button_color[state])
param_button.label.set_weight(param_button_weight[state])
save_button.color = (0.85, 0, 0)
save_button.hovercolor = (0.95, 0, 0)
update(fig)
param_button.on_clicked(toggle_param_callback)
return param_button # This is to stop the gc from deleting the data
param_buttons = [setup_param_button(p) for p in range(len(display_params))]
# Add old pointing model and labels
list_o_names = 'Ant:%s , Datasets:'%(antenna.name) + ' ,'.join(np.unique(data['dataset']).tolist() )
fig.text(0.905, 0.98,list_o_names, horizontalalignment='right',fontsize=10)
fig.text(0.053, 0.95, 'OLD', ha='center', va='bottom', size='large')
fig.text(0.105, 0.95, 'MODEL', ha='center', va='bottom', size='large')
fig.text(0.16, 0.95, 'NEW', ha='center', va='bottom', size='large')
fig.text(0.225, 0.95, 'STD', ha='center', va='bottom', size='large')
for p, param in enumerate(display_params):
param_str = param_to_str(old_model, param) if list(old_model.values())[param] else ''
fig.text(0.085, 0.94 - (0.5 * 0.85 + p * 0.9) / len(display_params), param_str, ha='right', va='center')
# Create target selector buttons and related text (title + target string)
fig.text(0.565, 0.95, 'TARGET', ha='center', va='bottom', size='large')
fig.text(0.565, 0.89, unique_targets[fig.highlighted_target], ha='center', va='top', fontdict=dict(color=(0.25,0,0,1)))
quiver_scale = 0.1 * 10 * np.pi / 6 / deg2rad(old.robust_sky_rms / 60.)
fig.axes[4].quiv.set_segments(quiver_segments(new.residual_az, new.residual_el, quiver_scale))
# Target state: 0 = flagged, 1 = unflagged, 2 = highlighted
target_state = keep * ((target_index == fig.highlighted_target) + 1)
# Specify colours of flagged, unflagged and highlighted dots, respectively, as RGBA tuples
dot_colors = np.choose(target_state, np.atleast_3d(np.vstack([(1,1,1,1), (0,0,1,1), (1,0,0,1)]))).T
for ax in fig.axes[:7]:
ax.dots.set_facecolors(dot_colors)
fig.texts[-1].set_text(unique_targets[fig.highlighted_target])
for p, param in enumerate(display_params):
fig.texts[2*p + 6].set_text(param_to_str(new_model, param) if enabled_params[param] else '')
# HACK to convert sigmas to arcminutes, but not for P9 and P12 (which are scale factors)
# This functionality should really reside inside the PointingModel class
std_param = rad2deg(sigma_params[param]) * 60. if param not in [8, 11] else sigma_params[param]
std_param_str = ("%.2f'" % std_param) if param not in [8, 11] else ("%.0e" % std_param)
fig.texts[2*p + 7].set_text(std_param_str if enabled_params[param] and opts.use_stats else '')
# Turn parameter string bold if it changed significantly from old value
if np.abs(params[param] - list(old_model.values())[param]) > 3.0 * sigma_params[param]:
fig.texts[2*p + 6].set_weight('bold')
fig.texts[2*p + 7].set_weight('bold')
else:
fig.texts[2*p + 6].set_weight('normal')
fig.texts[2*p + 7].set_weight('normal')
daz_az, del_az, daz_el, del_el, quiver, before, after = fig.axes[:7]
# Update residual plots
daz_az.dots.set_offsets(np.c_[rad2deg(az), rad2deg(new.residual_xel) * 60.])
del_az.dots.set_offsets(np.c_[rad2deg(az), rad2deg(new.residual_el) * 60.])
daz_el.dots.set_offsets(np.c_[rad2deg(el), rad2deg(new.residual_xel) * 60.])
del_el.dots.set_offsets(np.c_[rad2deg(el), rad2deg(new.residual_el) * 60.])
after.dots.set_offsets(np.c_[np.arctan2(new.residual_el, new.residual_xel), new.abs_sky_error])
resid_lim = 1.2 * max(new.abs_sky_error.max(), old.abs_sky_error.max())
daz_az.set_ylim(-resid_lim, resid_lim)
del_az.set_ylim(-resid_lim, resid_lim)
daz_el.set_ylim(-resid_lim, resid_lim)
del_el.set_ylim(-resid_lim, resid_lim)
before.set_ylim(0, resid_lim)
after.set_ylim(0, resid_lim)
fig.savefig(pp,format='pdf')
# plt.close(fig)
pp.close()
def angle_formatter(x, pos=None):
return theta_formatter(wrap_angle(np.pi / 2.0 - x), pos)
def angle_formatter(x, pos=None):
return theta_formatter(wrap_angle(np.pi / 2.0 - x), pos)
# Interpret first non-comment line as header
fields = data[0].tolist()
# By default, all fields are assumed to contain floats
formats = np.tile(np.float, len(fields))
# The string_fields are assumed to contain strings - use data's string type, as it is of sufficient length
formats[[fields.index(name) for name in string_fields if name in fields]] = data.dtype
# Convert to heterogeneous record array
data = np.rec.fromarrays(data[1:].transpose(), dtype=zip(fields, formats))
# Load antenna description string from first line of file and construct antenna object from it
antenna = katpoint.Antenna(file(filename).readline().strip().partition('=')[2])
# Use the pointing model contained in antenna object as the old model (if not overridden by file)
# If the antenna has no model specified, a default null model will be used
if old_model is None:
old_model = antenna.pointing_model
# Obtain desired fields and convert to radians
az, el = wrap_angle(deg2rad(data['azimuth'])), deg2rad(data['elevation'])
measured_delta_az, measured_delta_el = deg2rad(data['delta_azimuth']), deg2rad(data['delta_elevation'])
# Uncertainties are optional
min_std = deg2rad(opts.min_rms / 60. / np.sqrt(2))
std_delta_az = np.clip(deg2rad(data['delta_azimuth_std']), min_std, np.inf) \
if 'delta_azimuth_std' in data.dtype.fields and opts.use_stats else np.tile(min_std, len(az))
std_delta_el = np.clip(deg2rad(data['delta_elevation_std']), min_std, np.inf) \
if 'delta_elevation_std' in data.dtype.fields and opts.use_stats else np.tile(min_std, len(el))
targets = data['target']
keep = data['keep'].astype(np.bool) if 'keep' in data.dtype.fields else np.tile(True, len(targets))
# Initialise new pointing model and set default enabled parameters
new_model = katpoint.PointingModel()
num_params = len(new_model)
default_enabled = np.nonzero(old_model.values())[0]
# If the old model is empty / null, select the most basic set of parameters for starters
# By default, all fields are assumed to contain floats
formats = np.tile(np.float, len(fields))
# The string_fields are assumed to contain strings - use data's string type, as it is of sufficient length
formats[[fields.index(name) for name in string_fields
if name in fields]] = data.dtype
# Convert to heterogeneous record array
data = np.rec.fromarrays(data[1:].transpose(),
dtype=list(zip(fields, formats)))
# Load antenna description string from first line of file and construct antenna object from it
antenna = katpoint.Antenna(open(filename).readline().strip().partition('=')[2])
# Use the pointing model contained in antenna object as the old model (if not overridden by file)
# If the antenna has no model specified, a default null model will be used
if old_model is None:
old_model = antenna.pointing_model
# Obtain desired fields and convert to radians
az, el = wrap_angle(deg2rad(data['azimuth'])), deg2rad(data['elevation'])
measured_delta_az, measured_delta_el = deg2rad(data['delta_azimuth']), deg2rad(
data['delta_elevation'])
# Uncertainties are optional
min_std = deg2rad(opts.min_rms / 60. / np.sqrt(2))
std_delta_az = np.clip(deg2rad(data['delta_azimuth_std']), min_std, np.inf) \
if 'delta_azimuth_std' in data.dtype.fields and opts.use_stats else np.tile(min_std, len(az))
std_delta_el = np.clip(deg2rad(data['delta_elevation_std']), min_std, np.inf) \
if 'delta_elevation_std' in data.dtype.fields and opts.use_stats else np.tile(min_std, len(el))
targets = data['target']
keep = data['keep'].astype(
np.bool) if 'keep' in data.dtype.fields else np.tile(True, len(targets))
# Initialise new pointing model and set default enabled parameters
new_model = katpoint.PointingModel()
num_params = len(new_model)
