def read_data(self, f_min, f_max,force_read=False):
self.uv = pyuvdata.UVData()
if os.path.exists(self.data_dir + self.autos_file) and not force_read:
self.uv.read(self.data_dir + self.autos_file)
holder_freq_array_1 = self.uv.freq_array <= f_max*1e6
holder_freq_array_2 = self.uv.freq_array >= f_min*1e6
holder_freq_array = np.full(holder_freq_array_1.shape, True, dtype=bool)
holder_freq_array[holder_freq_array_1==False] = False
holder_freq_array[holder_freq_array_2==False] = False
self.uv.read(self.data_dir + self.autos_file,freq_chans = holder_freq_array)
else:
file_lists = np.sort(glob.glob(self.data_dir + self.filestart + self.fileend))
uv_temp = pyuvdata.UVData()
for i in range(len(file_lists)):
print file_lists[i]
if i == 0:
self.uv.read([file_lists[i]],ant_str='auto')
#self.uv.select(time_range=)
else:
uv_temp.read([file_lists[i]],ant_str='auto')
#uv_temp.select(time_range=[])
self.uv += uv_temp
self.uv.write_uvh5(self.data_dir + self.autos_file)
# Get some useful parameters
self.lsts, ind = np.unique(self.uv.lst_array, return_index=True)
order = np.argsort(ind)
self.lsts = 24 * self.lsts[order] / (2 * np.pi)
self.wrap = np.argmax(self.lsts)
self.freqs = self.uv.freq_array.flatten() * 1e-6
self.ants = self.uv.get_ants()
def generate_residual_IDR2_2(uvh5_file,
omni_vis,
omni_calfits,
abs_calfits,
outfile,
clobber=False):
# reading uvh5 data file
hd = HERAData(uvh5_file)
data, flags, nsamples = hd.read(polarizations=['ee', 'nn'])
# reading omnical model visibilities
hd_oc = HERAData(omni_vis)
omnivis, omnivis_flags, _ = hd_oc.read()
uvo = pyuvdata.UVData()
uvo.read_uvh5(omni_vis)
# reading calfits file
hc = HERACal(omni_calfits)
oc_gains, oc_flags, oc_quals, oc_total_quals = hc.read()
hc = HERACal(abs_calfits)
ac_gains, ac_flags, ac_quals, ac_total_quals = hc.read()
# calibrating the data
abscal_data, abscal_flags = copy.deepcopy(data), copy.deepcopy(flags)
calibrate_in_place(abscal_data,
ac_gains,
data_flags=abscal_flags,
cal_flags=ac_flags)
res_data, res_flags = copy.deepcopy(hd.data_array), copy.deepcopy(
hd.flag_array)
resdata, resflags = copy.deepcopy(abscal_data), copy.deepcopy(abscal_flags)
for i, p in enumerate(['ee', 'nn']):
# reading omnical model visibilities
hd_oc = HERAData(omni_vis)
omnivis, omnivis_flags, _ = hd_oc.read(polarizations=[p])
mod_bls = list(omnivis.keys())
red_bls = get_reds(hd.antpos, pols=p)
red = gr.RBL(red_bls)
for mbl in mod_bls:
bl_grp = red[tuple(mbl[0:2]) + ('J{}'.format(p), )]
for blp in bl_grp:
bl = (blp[0], blp[1], p)
inds = hd.antpair2ind(bl)
omnivis_scaled = omnivis[mbl] * oc_gains[(blp[0], 'J{}'.format(
p))] * np.conj(oc_gains[(blp[1], 'J{}'.format(p))])
omnivis_scaled /= (
ac_gains[(blp[0], 'J{}'.format(p))] *
np.conj(ac_gains[(blp[1], 'J{}'.format(p))]))
resdata[bl] = abscal_data[bl] - omnivis_scaled
resflags[bl] = abscal_flags[bl]
res_data[inds, 0, :, i] = resdata[bl]
res_flags[inds, 0, :, i] = resflags[bl]
# writing to file
hd.data_array = res_data
hd.flag_array = res_flags
hd.write_uvh5(outfile, clobber=clobber)
def genclosurephase(fin,**kwargs):
print(fin)
hh = c.hf(genclosurephase, fin)
mm = repo.get(hh)
print(mm)
if mm:
c.trc( "[Cached]", "makemsfile", fin)
else:
c.trc( "[Eval] ", "makemsfile", fin, " -> ", hh)
UV = pyuvdata.UVData()
UV.read_miriad(fin)
UV.phase_to_time(Time(UV.time_array[0], format='jd', scale='utc'))
tempf = repo.mktemp()
os.remove(tempf)
UV.write_uvfits(tempf, spoof_nonessential=True)
if not os.path.exists(tempf):
raise RuntimeError("No output produced by mkuvfits!")
foms = c.importuvfits(tempf)
os.remove(tempf)
flms = c.flagdata(foms,autocorr=True)
mm = repo.put(flms, hh)
fout=os.path.split(fin)[-1]+".npz"
r=hc.closurePh(mm,trlist=inTriads,alist=inAntenna)
np.savez(fout,**r)
if not os.path.exists(fout):
raise RuntimeError("No output produced by hc.closurePh !")
return(fout)
def load_pyuvdata(self, filename, chtypes, fold_factor, psize):
uv = pyuvdata.UVData()
uv.read_miriad(filename)
self.uv = copy(uv)
self.antpairs = copy(uv.get_antpairs())
self.dset_size = np.shape(self.uv.data_array)[0] / 60
self.chtypes = chtypes
self.fold_factor = fold_factor #16
self.psize = psize #68
def mkuvfits(file,outputdir): head,tail = os.path.split(file) if os.path.exists(file+"fits") == False: UV =pyuvdata.UVData() UV.read_miriad(file,'miriad') UV.phase_to_time(UV.time_array[0]) UV.write_uvfits(outputdir+tail+"fits",'uvfits') return file+"fits"
def mkuvfits(fin, fout):
UV = pyuvdata.UVData()
#Read file and rewrap phases.
UV.read_miriad(fin, 'miriad')
UV.phase_to_time(UV.time_array[0])
UV.write_uvfits(fout, 'uvfits')
#Output to .ms directory
casa.importuvfits(fout, fout + '.ms')
def loadPYUVdata(file_locs, suffix):
files = np.array(glob(file_locs + '*' + suffix))
info = {}
ct = 0
rnd_ = np.random.randint(len(files), size=5)
file_cut = files[rnd_]
for f in file_cut:
print(f)
uv = pyuvdata.UVData()
uv.read_miriad(f,
run_check_acceptability=False,
run_check=False,
check_extra=False)
antpairs = uv.get_antpairs()
flag_npz_name = '.'.join(f.split('.')[:5]) + '.uvOC.flags.npz'
try:
flag_npz = np.load(flag_npz_name)
except:
#continue
print('Skipping because npz flag file -{}- not found'.format(
flag_npz_name))
for i in range(10):
rnd = np.random.randint(len(antpairs))
ap1, ap2 = antpairs[rnd]
bsl = uv.antnums_to_baseline(ap1, ap2)
try:
HERAlabels_ = np.logical_not(
flag_npz['flag_array'][bsl == flag_npz['baseline_array']])
except:
HERAlabels_ = 0.
#pass
pos1 = uv.antenna_positions[uv.antenna_numbers == ap1]
pos2 = uv.antenna_positions[uv.antenna_numbers == ap2]
bl_len = np.round(np.sqrt(np.sum((pos1 - pos2)**2)), 2)
info[f + '_{0}'.format(ct)] = '{0}_blen_{1}'.format(
ct, bl_len
) #str(ct)+'_blen_'+str() #['antpairs'][ct] = antpairs[rnd] #antpairs[rnd] : ct}
if f == file_cut[0] and i == 0:
HERAdata = [uv.get_data(antpairs[rnd]).squeeze()]
try:
HERAlabels = [HERAlabels_.squeeze()]
except:
HERAlabels = []
else:
HERAdata.append(uv.get_data(antpairs[rnd]).squeeze())
try:
HERAlabels.append(HERAlabels_.squeeze())
except:
HERAlabels = []
ct += 1
del (uv)
print('Dataset size: ', np.shape(HERAdata))
if np.ndim(HERAlabels) > 1:
HERAlabels = np.zeros_like(HERAdata).real
return HERAdata, HERAlabels, info
def main():
command = argparse.ArgumentParser(
formatter_class=argparse.RawDescriptionHelpFormatter,
description=textwrap.dedent('''
---------------------------------------------------------------------------------------
HERA Array Topology Viewer
Author: James Kent
Institution: University of Cambridge, 2018
Email: [email protected]
Takes a HERA miriad file and plots the array topology.
Takes x,y locations to plot top-down view of the array, with antenna numbers.
'''))
command.add_argument('filepath', help=('miriad file from HERA'))
args = command.parse_args()
UV = pyuvdata.UVData()
UV.read_miriad(args.filepath)
ant_locs = UV.antenna_positions
ant_nums = UV.antenna_numbers
ant_x = ant_locs[:, 0]
ant_y = ant_locs[:, 1]
current_rot_angle = numpy.arctan2(ant_y[-1], ant_x[-1])
print("Current Rotation: ")
print(current_rot_angle)
# Rotate antenna positions
angle_rot = -current_rot_angle
cost = numpy.cos(angle_rot)
sint = numpy.sin(angle_rot)
xcost = ant_x * cost
xsint = ant_x * sint
ysint = ant_y * sint
ycost = ant_y * cost
x_rot = xcost - ysint
y_rot = xsint + ycost
fig, ax = plt.subplots(figsize=(8, 8))
ax.scatter(x_rot, y_rot)
for i, label in enumerate(ant_nums):
ax.annotate(label, (x_rot[i], y_rot[i]))
ax.set_xlabel('x')
ax.set_ylabel('y')
plt.savefig("hera_array.pdf")
plt.show()
def read_uvfile(uvfile):
"""
Reads in miriad file and returns the observed visibilities
and the corresponding flags.
Parameters
----------
uvfile : string
Name of input uvfile containing the visibilities and
corresponding metadata.
"""
uvd = pyuvdata.UVData()
uvd.read_miriad(uvfile)
return uvd
def miriad2pyuvdata(dset,
antenna_nums=None,
bls=None,
polarizations=None,
ant_str=None,
time_range=None):
"""
Reads-in a Miriad filepath to a UVData object
Parameters
----------
dset : str
Miriad file to convert to UVData object containing visibilities and
corresponding metadata
antenna_nums: integer list
The antennas numbers to read into the object.
bls: list of tuples
A list of antenna number tuples (e.g. [(0,1), (3,2)])
specifying baselines to read into the object. Ordering of the
numbers within the tuple does not matter. A single antenna iterable
e.g. (1,) is interpreted as all visibilities with that antenna.
ant_str: str
A string containing information about what kinds of visibility data
to read-in. Can be 'auto', 'cross', 'all'. Cannot provide ant_str if
antenna_nums and/or bls is not None.
polarizations: integer or string list
List of polarization integers or strings to read-in.
Ex: ['xx', 'yy', ...]
time_range: float list
len-2 list containing min and max range of times (Julian Date) to read-in.
Ex: [2458115.20, 2458115.40]
Returns
-------
uvd : pyuvdata.UVData object
"""
uvd = pyuvdata.UVData()
uvd.read_miriad(dset,
antenna_nums=antenna_nums,
bls=bls,
polarizations=polarizations,
ant_str=ant_str,
time_range=time_range)
return uvd
def read_uvfits(uvfits):
"""
Reads in uvfits file and returns the UVData object containing
the model visibilities and corresponding metadata.
Parameters
----------
uvfits : string
Name of input uvfits files containing the model visibilities
and the corresponding metadata.
"""
uvf = pyuvdata.UVData()
uvf.read_uvfits(uvfits)
uvf.unphase_to_drift()
return uvf
def convert_uv(self,
phs=None,
del_uvfits=False,
script='uvfits2ms',
del_script=True,
clobber=False):
"""
Converts Miriad file to Measurement set (MS)
Parameters
----------
phs : float, optional
Julian date at which to phase the visibilities. By default the visibilities are phased to middle timestamp of the file
del_uvfits : boolean, optional
If True, deleted the uvfits file that is created during the conversion from uvh5_file to ms.
Default is False.
script : string, optional
Casa script created on-the-fly to execute the casa task.
Default is uvfits2ms.
del_script: boolean, optional
If True, deletes the on-fly created casa script. Default is True.
clobber : boolean, optional
If True, overwrites the existing file by the new one.
Default is False
"""
uvd = pyuvdata.UVData()
uvd.read_uvh5(self.uvh5_file, run_check=False)
times = uvd.time_array
if not uvd.phase_type is 'phased':
phs_time = times[int(len(times) / 2.)] if phs is None else phs
print('Phasing visibilities to {}'.format(phs_time))
uvd.phase_to_time(Time(phs_time, format='jd', scale='utc'))
# converting to uvfits
uvfits = self.uvh5_file + '.uvfits'
print('Converting {} to {}'.format(self.uvh5_file, uvfits))
uvd.write_uvfits(uvfits, spoof_nonessential=True, run_check=False)
# converting to mset
if clobber:
if os.path.exists(self.outfile):
os.system('rm -rf {}'.format(self.outfile))
ct.uvfits2ms(uvfits,
outfile=self.outfile,
script=script,
delete=del_script)
# removing uvfits
if del_uvfits:
os.system('rm -rf {}'.format(uvfits))
# removing log files
os.system('rm -rf *.log')
def load_data(
data_path='/Users/ruby/EoR/compact_redundant_array_sim_May2020/square_grid_sim__results.uvh5',
uvw_match_tolerance=1e-12):
# Load data from pyuvsim simulation:
data_sim_compact = pyuvdata.UVData()
data_sim_compact.read_uvh5(data_path)
# Remove autos
data_sim_compact.select(ant_str='cross')
# Use only XX polarizations
data_sim_compact.select(polarizations=[-5])
# Convert baselines to have u>0
data_sim_compact.conjugate_bls(convention='u>0',
use_enu=False,
uvw_tol=0.01)
baseline_groups, bl_group_uvw, lengths, conjugates = (
data_sim_compact.get_redundancies(tol=0.1,
use_antpos=False,
include_conjugates=True,
include_autos=True,
conjugate_bls=False))
# Define constants
N_red_baselines = np.shape(baseline_groups)[0]
# Reorder visibilities
data_sim_vis = np.zeros(N_red_baselines, dtype=np.complex_)
for red_group in range(N_red_baselines):
found_group = False
for red_group_2 in range(N_red_baselines):
if np.abs(
np.sum(data_sim_compact.uvw_array[red_group] -
bl_group_uvw[red_group_2])) < uvw_match_tolerance:
data_sim_vis[red_group] = (
data_sim_compact.data_array[red_group_2, 0, 0, 0])
found_group = True
break
if not found_group:
print('ERROR: Visibility not found.')
# Make noiseless data
data_sim_expanded = data_sim_compact.copy()
data_sim_expanded.inflate_by_redundancy()
return data_sim_expanded, data_sim_vis, bl_group_uvw
def test_construct_pstokes_multipol(self):
"""test construct_pstokes on multi-polarization files"""
uvd = pyuvdata.UVData()
uvd.read(multipol_dset)
uvc = pyuvdata.UVCal()
uvc.read_calfits(multipol_dset_cal)
uvutils.uvcalibrate(uvd, uvc)
wgts = [(0.5, 0.5), (0.5, -0.5)]
for i, ps in enumerate(['pI', 'pQ']):
uvp = pstokes.construct_pstokes(dset1=uvd, dset2=uvd, pstokes=ps)
# assert polarization array is correct
assert uvp.polarization_array == np.array([i + 1])
# assert data are properly summmed
pstokes_vis = uvd.get_data(23, 24, 'xx') * wgts[i][0] + uvd.get_data(23, 24, 'yy') * wgts[i][1]
assert np.isclose(pstokes_vis, uvp.get_data(23, 24, ps)).all()
def test_redundancy_finder_fully_redundant_array():
"""Test the redundancy finder only returns one baseline group for fully redundant array."""
uvd = pyuvdata.UVData()
uvd.read_uvfits(os.path.join(DATA_PATH, 'test_redundant_array.uvfits'))
uvd.select(times=uvd.time_array[0])
tol = 1 # meters
bl_positions = uvd.uvw_array
baseline_groups, vec_bin_centers, lens, conjugates = uvutils.get_baseline_redundancies(
uvd.baseline_array, bl_positions, tol=tol, with_conjugates=True)
# Only 1 set of redundant baselines
assert len(baseline_groups) == 1
# Should return the input baselines
assert baseline_groups[0].sort() == np.unique(uvd.baseline_array).sort()
def mkuvfits(fin):
hh=c.hf(mkuvfits, fin)
mm=repo.get(hh)
if mm:
c.trc( "[Cached]", "mkuvfits", fin)
return mm
else:
c.trc( "[Eval] ", "mkuvfits", fin, " -> ", hh)
UV = pyuvdata.UVData()
UV.read_miriad(fin,'miriad')
UV.phase_to_time(UV.time_array[0])
tempf=repo.mktemp()
os.remove(tempf)
UV.write_uvfits(tempf,'uvfits')
if not os.path.exists(tempf):
raise RuntimeError("No output produced by mkuvfits !")
return repo.put(tempf, hh)
def get_VI_data(vis_data_path):
uvd = pyuvdata.UVData()
uvd.read_uvh5(vis_data_path)
# one of these days...
xx_integer = pyuvdata.utils.polstr2num('xx')
yy_integer = pyuvdata.utils.polstr2num('yy')
xx_ind = np.argwhere(uvd.polarization_array == xx_integer)[0][0]
yy_ind = np.argwhere(uvd.polarization_array == yy_integer)[0][0]
VI_data = uvd.data_array[:, :, :, xx_ind] + uvd.data_array[:, :, :, yy_ind]
uvd.select(polarizations=(-5))
uvd.polarization_array[0] = 1
uvd.data_array = VI_data.reshape(VI_data.shape + (1, ))
return uvd
def getUVData(directory,datdictionary):
'''
searches the directory for a file that matches file pattern (recid and ant from datdictionary)
returns pyuvdata object
'''
logger = logger_defaults.getModuleLogger(__name__)
rec = datdictionary['recid']
ant = datdictionary['ant']
fnamepattern = os.path.expanduser(os.path.join(directory,'*_' + str(rec) + '_*_' + ant + '.h5'))
fnamelist = glob.glob(fnamepattern)
if len(fnamelist) != 1:
logger.error('there is not exactly 1 file matching the pattern. Got {}'.format(fnamelist))
raise RuntimeError('not 1 filename matching the patter')
fname = fnamelist[0]
UV = pyuvdata.UVData()
UV.read_uvh5(fname)
return UV
def makemsfile(fin,**kwargs):
print(fin)
hh = c.hf(makemsfile, fin)
mm = repo.get(hh)
print(mm)
if mm:
c.trc( "[Cached]", "makemsfile", fin)
else:
c.trc( "[Eval] ", "makemsfile", fin, " -> ", hh)
UV = pyuvdata.UVData()
UV.read_miriad(fin)
UV.phase_to_time(Time(UV.time_array[0], format='jd', scale='utc'))
tempf = repo.mktemp()
os.remove(tempf)
UV.write_uvfits(tempf, spoof_nonessential=True)
if not os.path.exists(tempf):
raise RuntimeError("No output produced by mkuvfits!")
foms = c.importuvfits(tempf)
os.remove(tempf)
#flms = c.flagdata(foms,autocorr=True)
mm = repo.put(foms, hh)
return(mm)
def load_model(
data_sim_expanded,
bl_group_uvw,
model_path='/Users/ruby/EoR/compact_redundant_array_sim_May2020/square_grid_100mjy_sim_results.uvh5',
uvw_match_tolerance=1e-12):
# Define constant
N_red_baselines = np.shape(bl_group_uvw)[0]
# Load data with missing sources from pyuvsim simulation:
model_sim = pyuvdata.UVData()
model_sim.read_uvh5(model_path)
# Remove autos
model_sim.select(ant_str='cross')
# Use only XX polarizations
model_sim.select(polarizations=[-5])
# Convert baselines to have u>0
model_sim.conjugate_bls(convention='u>0', use_enu=False, uvw_tol=0.01)
model_sim_visibilities = np.zeros(N_red_baselines, dtype=np.complex_)
for red_group in range(N_red_baselines):
found_group = False
for red_group_2 in range(N_red_baselines):
if np.abs(
np.sum(model_sim.uvw_array[red_group] -
bl_group_uvw[red_group_2])) < uvw_match_tolerance:
model_sim_visibilities[red_group] = (
model_sim.data_array[red_group_2, 0, 0, 0])
found_group = True
break
if not found_group:
print('ERROR: Visibility not found.')
return model_sim_visibilities
qIn = dsIn.q_hat(key1, key2, use_cov=False, cov_flagging=False)
MCn, WCn = dsCn.get_MW(FCn, mode='I')
MIn, WIn = dsIn.get_MW(FIn, mode='I')
pCn = dsCv.p_hat(MCn, qCn, scalar=scalar)
pIn = dsIv.p_hat(MIn, qIn, scalar=scalar)
pCns.append(pCn)
pIns.append(pIn)
return np.array(pIvs), np.array(pIns)
new_files_odd = []
new_files_even = []
lsts_odd = []
lsts_ODD = []
#### PAPER LST binned files dont have equal time samples, find files with 21 LST samples
for i in dfiles_odd:
_d = uv.UVData()
_d.read_miriad(i)
if len(np.unique(_d.time_array)) == 21:
new_files_odd.append(i)
lsts_ODD.append(np.unique(_d.lst_array))
lsts_odd.append(np.mean(np.unique(_d.lst_array)))
lsts_ODD = np.sort(np.array(lsts_ODD).reshape(-1))
lsts_even = []
lsts_EVEN = []
for i in dfiles_even:
_d = uv.UVData()
_d.read_miriad(i)
if len(np.unique(_d.time_array)) == 21:
new_files_even.append(i)
import pyuvdata
import glob
import numpy as np
from math import pi
pathlist = 3 * ['/data6/HERA/data/2458042/zen.2458042.']
obs = ['12552', '48343', '53563']
for k in range(3):
pathlist[k] += obs[k] + '.xx.HH.uv'
UV0 = pyuvdata.UVData()
UV48 = pyuvdata.UVData()
UV55 = pyuvdata.UVData()
UV0.read_miriad(pathlist[0])
UV48.read_miriad(pathlist[1])
UV55.read_miriad(pathlist[2])
begin = UV0.lst_array[0]
ev_beg = UV48.lst_array[0] + 2 * pi
end = UV55.lst_array[0] + 2 * pi
lst = np.array([begin, ev_beg, end]) * 24 / (2 * pi)
lst_len = np.diff(lst)
print('The LSTs of the events were: ' + str(lst))
print('The differences between the events were ' + str(lst_len))
import pyuvdata, numpy
from pylab import *
args = sys.argv[1:]
print(args)
lst = np.array([])
for lstfile in args:
uv = pyuvdata.UVData()
uv.read_miriad(lstfile, run_check=False, run_check_acceptability=False)
waterfall = (uv.nsample_array[np.where(
uv.baseline_array == 264257)].squeeze())
try:
data = np.append(data, waterfall, axis=0)
except NameError:
data = waterfall
lstslice = (uv.lst_array[np.where(uv.baseline_array == 264257)].squeeze())
lst = np.append(lst, lstslice)
indices = numpy.argsort(lst)
lst = lst[indices]
imshow(numpy.abs(data[indices]),
interpolation='nearest',
aspect='auto',
extent=[uv.freq_array[0, 0], uv.freq_array[0, -1], lst[-1], lst[0]])
xlabel('Frequency (Hz)')
ylabel('Local Sidereal Time (Radians)')
cb = colorbar()
cb.set_label('Number of Samples')
def create_snap_uvdata(snapdict, azoffset, eloffset, recid, setid=None):
logger_defaults.getModuleLogger(__name__)
obj = pyuvdata.UVData()
ant = snapdict['ant']
ashape = numpy.shape(snapdict['auto0'])
#obj.latitude = ata_constants.ATA_LAT
#obj.longitude = ata_constants.ATA_LON
#obj.altitude = ata_constants.ATA_ELEV
try:
obj.telescope_location = pyuvdata.uvutils.XYZ_from_LatLonAlt(
ata_constants.ATA_LAT / 180.0 * numpy.pi,
ata_constants.ATA_LON / 180.0 * numpy.pi, ata_constants.ATA_ELEV)
except AttributeError:
obj.telescope_location = pyuvdata.utils.XYZ_from_LatLonAlt(
ata_constants.ATA_LAT / 180.0 * numpy.pi,
ata_constants.ATA_LON / 180.0 * numpy.pi, ata_constants.ATA_ELEV)
obj.telescope_name = ata_constants.ATA_NAME
obj.instrument = ata_constants.ATA_NAME + snapdict['host']
if azoffset == 0 and eloffset == 0:
obj.object_name = snapdict['source']
else:
obj.object_name = '{0:s}_off_{1:03.1f}_{2:03.1f}'.format(
snapdict['source'], azoffset, eloffset)
obj.history = 'Snap Waterfall measurement'
obj.phase_type = 'phased'
obj.Nants_data = 1
obj.Nants_telescope = len(ata_constants.ant_names)
aind = ata_constants.ant_names.index(ant)
obj.ant_1_array = numpy.array([aind] * ashape[0])
obj.ant_2_array = numpy.array([aind] * ashape[0])
obj.baseline_array = pow(2,
16) + (numpy.array([aind] * ashape[0]) + 1) * 2049
obj.antenna_names = ata_constants.ant_names
obj.antenna_numbers = list(range(len(ata_constants.ant_names)))
obj.Nbls = 1
obj.Nblts = ashape[0] #should be the same as snapdict['ncaptures']
obj.Nfreqs = ashape[1]
obj.Npols = 2
#that may be wrong
obj.Ntimes = ashape[0]
obj.Nspws = 1
obj.uvw_array = numpy.zeros((ashape[0], 3), dtype=float)
tt = Time(snapdict['auto0_timestamp'],
format='unix',
location=(ata_constants.ATA_LON, ata_constants.ATA_LAT,
ata_constants.ATA_ELEV))
#obj.time_array = tt.to_value('mjd', 'long')
obj.time_array = tt.jd
#utils.get_lst_for_time?
obj.lst_array = numpy.array(tt.sidereal_time('apparent')) / 12 * numpy.pi
#obj.integration_time = [ashape[1]/(snapdict['srate']*1e6)] *ashape[0]
obj.integration_time = [snapdict['tint']] * ashape[0]
tmparray = numpy.zeros((1, len(snapdict['frange'])))
tmparray[0][:] = snapdict['frange'] * 1e6
obj.freq_array = tmparray
#obj.channel_width = snapdict['srate']/2
obj.channel_width = (snapdict['frange'][1] - snapdict['frange'][0]) * 1e6
#i am not sure about that
obj.spw_array = [1]
#-5 is XX, -6 is YY
obj.polarization_array = [-5, -6]
obj.vis_units = 'uncalib'
obj.nsample_array = numpy.ones((ashape[0], 1, ashape[1], 2), dtype=float)
obj.flag_array = numpy.zeros((ashape[0], 1, ashape[1], 2), dtype=bool)
obj.data_array = numpy.zeros((ashape[0], 1, ashape[1], 2),
dtype=numpy.complex64)
xx = numpy.array(snapdict['auto0'], dtype=numpy.complex64)
obj.data_array[:, 0, :, 0] = xx
yy = numpy.array(snapdict['auto1'], dtype=numpy.complex64)
obj.data_array[:, 0, :, 1] = yy
#now we have all required parameters, let's fill the extra keywords
apos_dict = ata_control.get_ant_pos(ata_constants.ant_names)
obj.antenna_positions = numpy.zeros((len(ata_constants.ant_names), 3),
dtype=float)
for ii in range(len(ata_constants.ant_names)):
cant = ata_constants.ant_names[ii]
obj.antenna_positions[ii][0] = apos_dict[cant][1]
obj.antenna_positions[ii][1] = apos_dict[cant][0]
obj.antenna_positions[ii][2] = apos_dict[cant][2]
#optional arguments
obj.timesys = datetime.datetime.utcfromtimestamp(
snapdict['auto0_timestamp'][0]).strftime('%Y-%m-%d %H:%M:%S')
if 'ra' in snapdict:
obj.phase_center_ra = snapdict['ra'] / 12 * numpy.pi
else:
obj.phase_center_ra = 0
if 'dec' in snapdict:
obj.phase_center_dec = snapdict['dec'] / 180 * numpy.pi
else:
obj.phase_center_dec = 0
#J2000.0
obj.phase_center_epoch = 2000.0
#now we are creating an extra keywords dictionary
ek = {}
ek['ata_version'] = '0.3'
ek['fft_shift'] = snapdict['fft_shift']
ek['adc0_bitsnaps'] = snapdict['adc0_bitsnaps']
ek['adc1_bitsnaps'] = snapdict['adc1_bitsnaps']
ek['adc0_mean'] = snapdict['adc0_stats']['mean']
ek['adc0_dev'] = snapdict['adc0_stats']['dev']
ek['adc1_mean'] = snapdict['adc1_stats']['mean']
ek['adc1_dev'] = snapdict['adc1_stats']['dev']
ek['lfft_of0'] = len(snapdict['fft_of0'])
for ii in range(len(snapdict['fft_of0'])):
ek['fft_of0_' + str(ii)] = snapdict['fft_of0'][ii]
ek['lfft_of1'] = len(snapdict['fft_of1'])
for ii in range(len(snapdict['fft_of1'])):
ek['fft_of1_' + str(ii)] = snapdict['fft_of1'][ii]
ek['lauto0_of_count'] = len(snapdict['auto0_of_count'])
for ii in range(len(snapdict['auto0_of_count'])):
ek['auto0_of_count_' + str(ii)] = snapdict['auto0_of_count'][ii]
ek['lauto1_of_count'] = len(snapdict['auto1_of_count'])
for ii in range(len(snapdict['auto1_of_count'])):
ek['auto1_of_count_' + str(ii)] = snapdict['auto1_of_count'][ii]
ek['srate'] = snapdict['srate']
ek['fpga_clk'] = snapdict['fpga_clk']
ek['rfc'] = snapdict['rfc']
ek['ifc'] = snapdict['ifc']
ek['fpgfile'] = snapdict['fpgfile']
if not setid:
ek['setid'] = -1
else:
ek['setid'] = setid
ek['recid'] = recid
ek['ant'] = ant
if 'az' in snapdict:
ek['ant_az'] = snapdict['az']
else:
ek['ant_az'] = 0.0
if 'el' in snapdict:
ek['ant_el'] = snapdict['el']
else:
ek['ant_el'] = 0.0
obj.extra_keywords = ek
return obj
import pyuvdata as pyuv
import numpy as np
from matplotlib import cm
import matplotlib.pyplot as plt
UV = pyuv.UVData()
UV.read_uvfits('/Users/mike_e_dubs/python_stuff/uvfits/1061313008.uvfits')
baseline_time_indices = []
for m in range(UV.Nblts):
if UV.ant_1_array[m] == UV.ant_2_array[m]:
baseline_time_indices.append(m)
UV.select(blt_inds=baseline_time_indices)
fig1, ax1 = plt.subplots()
fig2, ax2 = plt.subplots()
Hxy = np.ma.masked_equal(np.absolute(UV.data_array[:, 0, :, 2]), 0)
Hyx = np.ma.masked_equal(np.absolute(UV.data_array[:, 0, :, 3]), 0)
cmap = cm.cool
cmap.set_bad(color='white')
caxXY = ax1.imshow(Hxy, cmap=cmap, vmin=np.amin(Hxy), vmax=np.amax(Hxy))
caxYX = ax2.imshow(Hyx, cmap=cmap, vmin=np.amin(Hyx), vmax=np.amax(Hyx))
cbarXY = fig1.colorbar(caxXY, ax=ax1)
cbarYX = fig2.colorbar(caxYX, ax=ax2)
nants = max(ant_nums) + 1
antpos = np.zeros([nants, 3])
for i, ant in enumerate(ant_nums):
antpos[ant, :] = rotecef_positions[i, :] / c_ns
# make an aa object
freqs = np.array([0.15])
beam = aipy.phs.Beam(freqs)
ants = [aipy.phs.Antenna(a[0], a[1], a[2], beam) for a in antpos]
aa = aipy.phs.AntennaArray(ants=ants, location=location)
# loop over miriad files
# XXX: DEFINE LIST OF MIRIAD FILES
for fn in list_of_miriad_files:
uvd = pyuvdata.UVData()
uvd.read_miriad(fn)
# set the telescope location
uvd.telescope_location_lat_lon_alt = (cofa_loc.lat * np.pi / 180.,
cofa_loc.lon * np.pi / 180.,
cofa_loc.elevation)
# loop over aa object
idx = 0
antpos = np.zeros((len(aa), 3))
ants_telescope = []
for iant, ant in enumerate(aa):
# test to see if antenna is "far" from center of the Earth
if np.linalg.norm(ant.pos) > 1e6:
# convert from ns -> m
def test_redundancy_finder():
"""
Check that get_baseline_redundancies and get_antenna_redundancies return consistent
redundant groups for a test file with the HERA19 layout.
"""
uvd = pyuvdata.UVData()
uvd.read_uvfits(
os.path.join(DATA_PATH,
'fewant_randsrc_airybeam_Nsrc100_10MHz.uvfits'))
uvd.select(times=uvd.time_array[0])
uvd.unphase_to_drift() # uvw_array is now equivalent to baseline positions
uvtest.checkWarnings(uvd.conjugate_bls,
func_kwargs={
'convention': 'u>0',
'use_enu': True
},
message=['The default for the `center`'],
nwarnings=1,
category=DeprecationWarning)
tol = 0.05 # meters
bl_positions = uvd.uvw_array
pytest.raises(ValueError, uvutils.get_baseline_redundancies,
uvd.baseline_array, bl_positions[0:2, 0:1])
baseline_groups, vec_bin_centers, lens = uvutils.get_baseline_redundancies(
uvd.baseline_array, bl_positions, tol=tol)
baseline_groups, vec_bin_centers, lens = uvutils.get_baseline_redundancies(
uvd.baseline_array, bl_positions, tol=tol)
for gi, gp in enumerate(baseline_groups):
for bl in gp:
bl_ind = np.where(uvd.baseline_array == bl)
bl_vec = bl_positions[bl_ind]
assert np.allclose(np.sqrt(np.dot(bl_vec, vec_bin_centers[gi])),
lens[gi],
atol=tol)
# Shift the baselines around in a circle. Check that the same baselines are
# recovered to the corresponding tolerance increase.
# This moves one baseline at a time by a fixed displacement and checks that
# the redundant groups are the same.
hightol = 0.25 # meters. Less than the smallest baseline in the file.
Nbls = uvd.Nbls
Nshifts = 5
shift_angs = np.linspace(0, 2 * np.pi, Nshifts)
base_shifts = np.stack(
((hightol - tol) * np.cos(shift_angs),
(hightol - tol) * np.sin(shift_angs), np.zeros(Nshifts))).T
for sh in base_shifts:
for bi in range(Nbls):
# Shift one baseline at a time.
bl_positions_new = uvd.uvw_array
bl_positions_new[bi] += sh
baseline_groups_new, vec_bin_centers, lens = uvutils.get_baseline_redundancies(
uvd.baseline_array, bl_positions_new, tol=hightol)
for gi, gp in enumerate(baseline_groups_new):
for bl in gp:
bl_ind = np.where(uvd.baseline_array == bl)
bl_vec = bl_positions[bl_ind]
assert np.allclose(np.sqrt(
np.abs(np.dot(bl_vec, vec_bin_centers[gi]))),
lens[gi],
atol=hightol)
# Compare baseline groups:
a = [tuple(el) for el in baseline_groups]
b = [tuple(el) for el in baseline_groups_new]
assert set(a) == set(b)
tol = 0.05
antpos, antnums = uvtest.checkWarnings(
uvd.get_ENU_antpos,
message=['The default for the `center`'],
category=DeprecationWarning,
nwarnings=1)
baseline_groups_ants, vec_bin_centers, lens = uvutils.get_antenna_redundancies(
antnums, antpos, tol=tol, include_autos=False)
# Under these conditions, should see 19 redundant groups in the file.
assert len(baseline_groups_ants) == 19
# Check with conjugated baseline redundancies returned
u16_0 = bl_positions[16, 0]
# Ensure at least one baseline has u==0 and v!=0 (for coverage of this case)
bl_positions[16, 0] = 0
baseline_groups, vec_bin_centers, lens, conjugates = uvutils.get_baseline_redundancies(
uvd.baseline_array, bl_positions, tol=tol, with_conjugates=True)
# restore baseline (16,0) and repeat to get correct groups
bl_positions[16, 0] = u16_0
baseline_groups, vec_bin_centers, lens, conjugates = uvutils.get_baseline_redundancies(
uvd.baseline_array, bl_positions, tol=tol, with_conjugates=True)
# Should get the same groups as with the antenna method:
baseline_groups_flipped = []
for bgp in baseline_groups:
bgp_new = []
for bl in bgp:
ai, aj = uvutils.baseline_to_antnums(bl, uvd.Nants_telescope)
if bl in conjugates:
bgp_new.append(
uvutils.antnums_to_baseline(aj, ai, uvd.Nants_telescope))
else:
bgp_new.append(
uvutils.antnums_to_baseline(ai, aj, uvd.Nants_telescope))
bgp_new.sort()
baseline_groups_flipped.append(bgp_new)
baseline_groups = [sorted(bgp) for bgp in baseline_groups]
assert np.all(
sorted(baseline_groups_ants) == sorted(baseline_groups_flipped))
for gi, gp in enumerate(baseline_groups):
for bl in gp:
bl_ind = np.where(uvd.baseline_array == bl)
bl_vec = bl_positions[bl_ind]
if bl in conjugates:
bl_vec *= (-1)
assert np.isclose(np.sqrt(np.dot(bl_vec, vec_bin_centers[gi])),
lens[gi],
atol=tol)
import plot_lib
from matplotlib import cm
from matplotlib.ticker import AutoMinorLocator
FHD_dir = '/Users/mike_e_dubs/MWA/FHD/fhd_mjw_Aug23_Jan2018/'
obs_str = '1061313128_f181.2_f187.5_t30_t36'
suffixes = [
'vis_XX.sav', 'vis_YY.sav', 'vis_model_XX.sav', 'vis_model_YY.sav',
'flags.sav'
]
fhd_files = [
'%s/vis_data/%s_%s' % (FHD_dir, obs_str, suffix) for suffix in suffixes
]
fhd_files.append('%s/metadata/%s_params.sav' % (FHD_dir, obs_str))
UV1 = pyuvdata.UVData()
UV2 = pyuvdata.UVData()
UV1.read_fhd(fhd_files, use_model=True)
UV2.read_uvfits(
'/Users/mike_e_dubs/MWA/Data/smaller_uvfits/1061313128_f181.2_f187.5_t30_t36.uvfits'
)
fhd_flags = np.sum(np.reshape(UV1.flag_array,
[UV2.Ntimes, UV2.Nbls, 1, UV2.Nfreqs, 2]),
axis=1)
dirty_flags = np.sum(np.reshape(UV2.flag_array[:, :, :, :2],
[UV2.Ntimes, UV2.Nbls, 1, UV2.Nfreqs, 2]),
axis=1)
fig1, ax1 = plt.subplots(figsize=(14, 8), nrows=2)
fig1.suptitle('Model Flags')
import pyuvdata
UV = pyuvdata.UVData()
UV.read_miriad(
'/Users/mike_e_dubs/python_stuff/miriad/temp_HERA_data/zen.2457555.40356.xx.HH.uvc'
)
UV.write_uvfits(
'/Users/mike_e_dubs/python_stuff/uvfits/zen.2457555.40356.xx.HH.uvfits',
force_phase=True,
spoof_nonessential=True)
def test_redundancy_finder():
"""
Check that get_baseline_redundancies and get_antenna_redundancies return consistent
redundant groups for a test file with the HERA19 layout.
"""
uvd = pyuvdata.UVData()
uvd.read_uvfits(
os.path.join(
DATA_PATH,
'hera19_8hrs_uncomp_10MHz_000_05.003111-05.033750.uvfits'))
uvd.select(times=uvd.time_array[0])
uvd.unphase_to_drift(
use_ant_pos=True) # uvw_array is now equivalent to baseline positions
tol = 0.05 # meters
bl_positions = uvd.uvw_array
nt.assert_raises(ValueError, uvutils.get_baseline_redundancies,
uvd.baseline_array, bl_positions[0:2, 0:1])
baseline_groups, vec_bin_centers, lens = uvutils.get_baseline_redundancies(
uvd.baseline_array, bl_positions, tol=tol)
baseline_groups, vec_bin_centers, lens = uvutils.get_baseline_redundancies(
uvd.baseline_array, bl_positions, tol=tol)
for gi, gp in enumerate(baseline_groups):
for bl in gp:
bl_ind = np.where(uvd.baseline_array == bl)
bl_vec = bl_positions[bl_ind]
nt.assert_true(
np.allclose(np.sqrt(np.dot(bl_vec, vec_bin_centers[gi])),
lens[gi],
atol=tol))
# Now jostle the baselines around by up to 0.25m and see if we can recover the same redundancies to that tolerance.
tol = 0.25 # meters. Less than the smallest baseline in the file.
Nbls = uvd.Nbls
shift_dists = np.random.uniform(low=0.0, high=tol / 2., size=Nbls)
shift_angs = np.random.uniform(low=0.0, high=2 * np.pi, size=Nbls)
shift_vecs = np.stack(
(shift_dists * np.cos(shift_angs), shift_dists * np.sin(shift_angs),
np.zeros(Nbls))).T
bl_positions_new = uvd.uvw_array + shift_vecs
baseline_groups_new, vec_bin_centers, lens = uvutils.get_baseline_redundancies(
uvd.baseline_array, bl_positions_new, tol=tol)
for gi, gp in enumerate(baseline_groups_new):
for bl in gp:
bl_ind = np.where(uvd.baseline_array == bl)
bl_vec = bl_positions[bl_ind]
nt.assert_true(
np.allclose(np.sqrt(np.abs(np.dot(bl_vec,
vec_bin_centers[gi]))),
lens[gi],
atol=tol))
# Compare baseline groups:
for c, blg in enumerate(baseline_groups):
bl = blg[0]
ind = np.sum(np.where([bl in gp for gp in baseline_groups_new]))
nt.assert_equal(baseline_groups_new[ind], blg)
tol = 0.05
antpos, antnums = uvd.get_ENU_antpos()
baseline_groups_ants, vec_bin_centers, lens = uvutils.get_antenna_redundancies(
antnums, antpos, tol=tol, include_autos=True)
# Under these conditions, should see 31 redundant groups in the file.
nt.assert_equal(len(baseline_groups_ants), 31)
# Check with conjugated baseline redundancies returned
u16_0 = bl_positions[16, 0]
bl_positions[
16,
0] = 0 # Ensure at least one baseline has u==0 and v!=0 (for coverage of this case)
baseline_groups, vec_bin_centers, lens, conjugates = uvutils.get_baseline_redundancies(
uvd.baseline_array, bl_positions, tol=tol, with_conjugates=True)
# restore baseline (16,0) and repeat to get correct groups
bl_positions[16, 0] = u16_0
baseline_groups, vec_bin_centers, lens, conjugates = uvutils.get_baseline_redundancies(
uvd.baseline_array, bl_positions, tol=tol, with_conjugates=True)
# Should get the same groups as with the antenna method:
baseline_groups_flipped = []
for bgp in baseline_groups:
bgp_new = []
for bl in bgp:
ai, aj = uvutils.baseline_to_antnums(bl, uvd.Nants_telescope)
if bl in conjugates:
bgp_new.append(
uvutils.antnums_to_baseline(aj, ai, uvd.Nants_telescope))
else:
bgp_new.append(
uvutils.antnums_to_baseline(ai, aj, uvd.Nants_telescope))
bgp_new.sort()
baseline_groups_flipped.append(bgp_new)
baseline_groups = [sorted(bgp) for bgp in baseline_groups]
nt.assert_true(
np.all(
sorted(baseline_groups_ants) == sorted(baseline_groups_flipped)))
for gi, gp in enumerate(baseline_groups):
for bl in gp:
bl_ind = np.where(uvd.baseline_array == bl)
bl_vec = bl_positions[bl_ind]
if bl in conjugates:
bl_vec *= (-1)
nt.assert_true(
np.isclose(np.sqrt(np.dot(bl_vec, vec_bin_centers[gi])),
lens[gi],
atol=tol))
