Exemplo n.º 1
0
def make_imaging_weight_column(ms):

    t = pt.table(ms, readonly=False, ack=False)
    cnames = t.colnames()

    try:
        cdesc = t.getcoldesc('DATA')
    except:
        raise ValueError('Column DATA does not exist')
    # Determine if the DATA storage specification is tiled.
    hasTiled = False
    try:
        dminfo = t.getdminfo("DATA")
        if dminfo['TYPE'][:5] == 'Tiled':
            hasTiled = True
    except:
        hasTiled = False
    # Use TiledShapeStMan if needed.
    if not hasTiled:
        dminfo = {
            'TYPE': 'TiledShapeStMan',
            'SPEC': {
                'DEFAULTTILESHAPE': [4, 32, 128]
            }
        }

    if 'IMAGING_WEIGHT' in cnames:
        six.print_("Column IMAGING_WEIGHT not added; it already exists")
    else:
        # Add IMAGING_WEIGHT which is 1-dim and has type float.
        # It needs a shape, otherwise the CASA imager complains.
        shp = []
        if 'shape' in cdesc:
            shp = cdesc['shape']
        if len(shp) > 0:
            shp = [shp[0]]  # use nchan from shape
        else:
            shp = [t.getcell('DATA', 0).shape[0]]  # use nchan from actual data
        cd = makearrcoldesc('IMAGING_WEIGHT',
                            0,
                            ndim=1,
                            shape=shp,
                            valuetype='float')
        dminfo = {
            'TYPE': 'TiledShapeStMan',
            'SPEC': {
                'DEFAULTTILESHAPE': [32, 128]
            }
        }
        dminfo['NAME'] = 'imagingweight'
        t.addcols(maketabdesc(cd), dminfo)

        print "added column IMAGING_WEIGHT"

    t.flush()
    t.close()

    return
Exemplo n.º 2
0
def addDerivedMSCal(msname):
    """ Add the derived columns like HA to an MS or CalTable.

    It adds the columns HA, HA1, HA2, PA1, PA2, LAST, LAST1, LAST2, AZEL1,
    AZEL2, and UVW_J2000.
    They are all bound to the DerivedMSCal virtual data manager.

    It fails if one of the columns already exists.

    """

    # Open the MS
    t = table(msname, readonly=False, ack=False)
    colnames = t.colnames()
    # Check that the columns needed by DerivedMSCal are present.
    # Note that ANTENNA2 and FEED2 are not required.
    for col in ["TIME", "ANTENNA1", "FIELD_ID", "FEED1"]:
        if col not in colnames:
            raise ValueError("Columns " + colnames +
                             " should be present in table " + msname)
    scols1 = ['HA', 'HA1', 'HA2', 'PA1', 'PA2']
    scols2 = ['LAST', 'LAST1', 'LAST2']
    acols1 = ['AZEL1', 'AZEL2']
    acols2 = ['UVW_J2000']
    descs = []
    # Define the columns and their units.
    for col in scols1:
        descs.append(
            makescacoldesc(col, 0., keywords={"QuantumUnits": ["rad"]}))
    for col in scols2:
        descs.append(makescacoldesc(col, 0., keywords={"QuantumUnits": ["d"]}))
    for col in acols1:
        descs.append(
            makearrcoldesc(col, 0., keywords={"QuantumUnits": ["rad", "rad"]}))
    for col in acols2:
        descs.append(
            makearrcoldesc(col,
                           0.,
                           keywords={
                               "QuantumUnits": ["m", "m", "m"],
                               "MEASINFO": {
                                   "Ref": "J2000",
                                   "type": "uvw"
                               }
                           }))
    # Add all columns using DerivedMSCal as data manager.
    dminfo = {"TYPE": "DerivedMSCal", "NAME": "", "SPEC": {}}
    t.addcols(maketabdesc(descs), dminfo)
    # Flush the table to make sure it is written.
    t.flush()
Exemplo n.º 3
0
def make_imaging_weight_column(ms):
    
    t = pt.table(ms, readonly=False, ack=False)
    cnames = t.colnames()
  
    try:
        cdesc = t.getcoldesc('DATA')
    except:
        raise ValueError('Column DATA does not exist')
    # Determine if the DATA storage specification is tiled.
    hasTiled = False
    try:
        dminfo = t.getdminfo("DATA")
        if dminfo['TYPE'][:5] == 'Tiled':
            hasTiled = True
    except:
        hasTiled = False
    # Use TiledShapeStMan if needed.
    if not hasTiled:
        dminfo = {'TYPE': 'TiledShapeStMan',
                  'SPEC': {'DEFAULTTILESHAPE': [4, 32, 128]}}    

    if 'IMAGING_WEIGHT' in cnames:
        six.print_("Column IMAGING_WEIGHT not added; it already exists")
    else:
        # Add IMAGING_WEIGHT which is 1-dim and has type float.
        # It needs a shape, otherwise the CASA imager complains.
        shp = []
        if 'shape' in cdesc:
            shp = cdesc['shape']
        if len(shp) > 0:
            shp = [shp[0]]  # use nchan from shape
        else:
            shp = [t.getcell('DATA', 0).shape[0]]  # use nchan from actual data
        cd = makearrcoldesc('IMAGING_WEIGHT', 0, ndim=1, shape=shp,
                            valuetype='float')
        dminfo = {'TYPE': 'TiledShapeStMan',
                  'SPEC': {'DEFAULTTILESHAPE': [32, 128]}}
        dminfo['NAME'] = 'imagingweight'
        t.addcols(maketabdesc(cd), dminfo)

        print "added column IMAGING_WEIGHT"
     
    t.flush()
    t.close()

    return
Exemplo n.º 4
0
def addDerivedMSCal(msname):
    """ Add the derived columns like HA to an MS or CalTable.

    It adds the columns HA, HA1, HA2, PA1, PA2, LAST, LAST1, LAST2, AZEL1,
    AZEL2, and UVW_J2000.
    They are all bound to the DerivedMSCal virtual data manager.

    It fails if one of the columns already exists.

    """

    # Open the MS
    t = table(msname, readonly=False, ack=False)
    colnames = t.colnames()
    # Check that the columns needed by DerivedMSCal are present.
    # Note that ANTENNA2 and FEED2 are not required.
    for col in ["TIME", "ANTENNA1", "FIELD_ID", "FEED1"]:
        if col not in colnames:
            raise ValueError("Columns " + colnames +
                             " should be present in table " + msname)
    scols1 = ['HA', 'HA1', 'HA2', 'PA1', 'PA2']
    scols2 = ['LAST', 'LAST1', 'LAST2']
    acols1 = ['AZEL1', 'AZEL2']
    acols2 = ['UVW_J2000']
    descs = []
    # Define the columns and their units.
    for col in scols1:
        descs.append(makescacoldesc(col, 0.,
                                    keywords={"QuantumUnits": ["rad"]}))
    for col in scols2:
        descs.append(makescacoldesc(col, 0.,
                                    keywords={"QuantumUnits": ["d"]}))
    for col in acols1:
        descs.append(makearrcoldesc(col, 0.,
                                    keywords={"QuantumUnits": ["rad", "rad"]}))
    for col in acols2:
        descs.append(makearrcoldesc(col, 0.,
                                    keywords={"QuantumUnits": ["m", "m", "m"],
                                              "MEASINFO": {"Ref": "J2000",
                                                           "type": "uvw"}}))
    # Add all columns using DerivedMSCal as data manager.
    dminfo = {"TYPE": "DerivedMSCal", "NAME": "", "SPEC": {}}
    t.addcols(maketabdesc(descs), dminfo)
    # Flush the table to make sure it is written.
    t.flush()
Exemplo n.º 5
0
def addImagingColumns(msname, ack=True):
    """ Add the columns to an MS needed for the casa imager.

    It adds the columns MODEL_DATA, CORRECTED_DATA, and IMAGING_WEIGHT.
    It also sets the CHANNEL_SELECTION keyword needed for the older casa
    imagers.

    A column is not added if already existing.
    """
    # numpy is needed
    import numpy as np
    # Open the MS
    t = table(msname, readonly=False, ack=False)
    cnames = t.colnames()
    # Get the description of the DATA column.
    try:
        cdesc = t.getcoldesc('DATA')
    except:
        raise ValueError('Column DATA does not exist')
    # Determine if the DATA storage specification is tiled.
    hasTiled = False
    try:
        dminfo = t.getdminfo("DATA")
        if dminfo['TYPE'][:5] == 'Tiled':
            hasTiled = True
    except:
        hasTiled = False
    # Use TiledShapeStMan if needed.
    if not hasTiled:
        dminfo = {'TYPE': 'TiledShapeStMan',
                  'SPEC': {'DEFAULTTILESHAPE': [4, 32, 128]}}
    # Add the columns(if not existing). Use the description of the DATA column.
    if 'MODEL_DATA' in cnames:
        six.print_("Column MODEL_DATA not added; it already exists")
    else:
        dminfo['NAME'] = 'modeldata'
        cdesc['comment'] = 'The model data column'
        t.addcols(maketabdesc(makecoldesc('MODEL_DATA', cdesc)), dminfo)
        if ack:
            six.print_("added column MODEL_DATA")
    if 'CORRECTED_DATA' in cnames:
        six.print_("Column CORRECTED_DATA not added; it already exists")
    else:
        dminfo['NAME'] = 'correcteddata'
        cdesc['comment'] = 'The corrected data column'
        t.addcols(maketabdesc(makecoldesc('CORRECTED_DATA', cdesc)), dminfo)
        if ack:
            six.print_("'added column CORRECTED_DATA")
    if 'IMAGING_WEIGHT' in cnames:
        six.print_("Column IMAGING_WEIGHT not added; it already exists")
    else:
        # Add IMAGING_WEIGHT which is 1-dim and has type float.
        # It needs a shape, otherwise the CASA imager complains.
        shp = []
        if 'shape' in cdesc:
            shp = cdesc['shape']
        if len(shp) > 0:
            shp = [shp[0]]  # use nchan from shape
        else:
            shp = [t.getcell('DATA', 0).shape[0]]  # use nchan from actual data
        cd = makearrcoldesc('IMAGING_WEIGHT', 0, ndim=1, shape=shp,
                            valuetype='float')
        dminfo = {'TYPE': 'TiledShapeStMan',
                  'SPEC': {'DEFAULTTILESHAPE': [32, 128]}}
        dminfo['NAME'] = 'imagingweight'
        t.addcols(maketabdesc(cd), dminfo)
        if ack:
            six.print_("added column IMAGING_WEIGHT")
    # Add or overwrite keyword CHANNEL_SELECTION.
    if 'CHANNEL_SELECTION' in t.colkeywordnames('MODEL_DATA'):
        t.removecolkeyword('MODEL_DATA', 'CHANNEL_SELECTION')
    # Define the CHANNEL_SELECTION keyword containing the channels of
    # all spectral windows.
    tspw = table(t.getkeyword('SPECTRAL_WINDOW'), ack=False)
    nchans = tspw.getcol('NUM_CHAN')
    chans = [[0, nch] for nch in nchans]
    t.putcolkeyword('MODEL_DATA', 'CHANNEL_SELECTION', np.int32(chans))
    if ack:
        six.print_("defined keyword CHANNEL_SELECTION in column MODEL_DATA")
    # Flush the table to make sure it is written.
    t.flush()
Exemplo n.º 6
0
def addImagingColumns(msname, ack=True):
    """ Add the columns to an MS needed for the casa imager.

    It adds the columns MODEL_DATA, CORRECTED_DATA, and IMAGING_WEIGHT.
    It also sets the CHANNEL_SELECTION keyword needed for the older casa
    imagers.

    A column is not added if already existing.
    """
    # numpy is needed
    import numpy as np
    # Open the MS
    t = table(msname, readonly=False, ack=False)
    cnames = t.colnames()
    # Get the description of the DATA column.
    try:
        cdesc = t.getcoldesc('DATA')
    except:
        raise ValueError('Column DATA does not exist')
    # Determine if the DATA storage specification is tiled.
    hasTiled = False
    try:
        dminfo = t.getdminfo("DATA")
        if dminfo['TYPE'][:5] == 'Tiled':
            hasTiled = True
    except:
        hasTiled = False
    # Use TiledShapeStMan if needed.
    if not hasTiled:
        dminfo = {'TYPE': 'TiledShapeStMan',
                  'SPEC': {'DEFAULTTILESHAPE': [4, 32, 128]}}
    # Add the columns(if not existing). Use the description of the DATA column.
    if 'MODEL_DATA' in cnames:
        six.print_("Column MODEL_DATA not added; it already exists")
    else:
        dminfo['NAME'] = 'modeldata'
        cdesc['comment'] = 'The model data column'
        t.addcols(maketabdesc(makecoldesc('MODEL_DATA', cdesc)), dminfo)
        if ack:
            six.print_("added column MODEL_DATA")
    if 'CORRECTED_DATA' in cnames:
        six.print_("Column CORRECTED_DATA not added; it already exists")
    else:
        dminfo['NAME'] = 'correcteddata'
        cdesc['comment'] = 'The corrected data column'
        t.addcols(maketabdesc(makecoldesc('CORRECTED_DATA', cdesc)), dminfo)
        if ack:
            six.print_("'added column CORRECTED_DATA")
    if 'IMAGING_WEIGHT' in cnames:
        six.print_("Column IMAGING_WEIGHT not added; it already exists")
    else:
        # Add IMAGING_WEIGHT which is 1-dim and has type float.
        # It needs a shape, otherwise the CASA imager complains.
        shp = []
        if 'shape' in cdesc:
            shp = cdesc['shape']
        if len(shp) > 0:
            shp = [shp[0]]  # use nchan from shape
        else:
            shp = [t.getcell('DATA', 0).shape[0]]  # use nchan from actual data
        cd = makearrcoldesc('IMAGING_WEIGHT', 0, ndim=1, shape=shp,
                            valuetype='float')
        dminfo = {'TYPE': 'TiledShapeStMan',
                  'SPEC': {'DEFAULTTILESHAPE': [32, 128]}}
        dminfo['NAME'] = 'imagingweight'
        t.addcols(maketabdesc(cd), dminfo)
        if ack:
            six.print_("added column IMAGING_WEIGHT")
    # Add or overwrite keyword CHANNEL_SELECTION.
    if 'CHANNEL_SELECTION' in t.colkeywordnames('MODEL_DATA'):
        t.removecolkeyword('MODEL_DATA', 'CHANNEL_SELECTION')
    # Define the CHANNEL_SELECTION keyword containing the channels of
    # all spectral windows.
    tspw = table(t.getkeyword('SPECTRAL_WINDOW'), ack=False)
    nchans = tspw.getcol('NUM_CHAN')
    chans = [[0, nch] for nch in nchans]
    t.putcolkeyword('MODEL_DATA', 'CHANNEL_SELECTION', np.int32(chans))
    if ack:
        six.print_("defined keyword CHANNEL_SELECTION in column MODEL_DATA")
    # Flush the table to make sure it is written.
    t.flush()
Exemplo n.º 7
0
def _write_observation_table(filename, config):
    """
    Write the observation table.
    """

    station = config.station
    nant = config.nant
    nbl = config.nbl
    tint = config.tint
    freq = config.freq
    nchan = config.nchan
    pols = config.pols
    npol = config.npol
    nint = config.nint

    # Observation

    col1 = tableutil.makearrcoldesc('TIME_RANGE',
                                    0.0,
                                    1,
                                    comment='Start and end of observation',
                                    keywords={
                                        'QuantumUnits': [
                                            's',
                                        ],
                                        'MEASINFO': {
                                            'type': 'epoch',
                                            'Ref': 'UTC'
                                        }
                                    })
    col2 = tableutil.makearrcoldesc('LOG', 'none', 1, comment='Observing log')
    col3 = tableutil.makearrcoldesc('SCHEDULE',
                                    'none',
                                    1,
                                    comment='Observing schedule')
    col4 = tableutil.makescacoldesc('FLAG_ROW', False, comment='Row flag')
    col5 = tableutil.makescacoldesc('OBSERVER',
                                    station.name,
                                    comment='Name of observer(s)')
    col6 = tableutil.makescacoldesc('PROJECT',
                                    station.name,
                                    comment='Project identification string')
    col7 = tableutil.makescacoldesc(
        'RELEASE_DATE',
        0.0,
        comment='Release date when data becomes public',
        keywords={
            'QuantumUnits': [
                's',
            ],
            'MEASINFO': {
                'type': 'epoch',
                'Ref': 'UTC'
            }
        })
    col8 = tableutil.makescacoldesc('SCHEDULE_TYPE',
                                    'all-sky',
                                    comment='Observing schedule type')
    col9 = tableutil.makescacoldesc('TELESCOPE_NAME',
                                    station.name,
                                    comment='Telescope Name (e.g. WSRT, VLBA)')

    desc = tableutil.maketabdesc(
        [col1, col2, col3, col4, col5, col6, col7, col8, col9])
    tb = table("%s/OBSERVATION" % filename, desc, nrow=nint, ack=False)

    tb.putcol('TIME_RANGE', numpy.zeros((nint, 2)), 0, nint)
    tb.putcol('LOG', numpy.array([
        [
            'Not provided',
        ],
    ] * nint, dtype='S'), 0, nint)
    tb.putcol('SCHEDULE', numpy.array([
        [
            'Not provided',
        ],
    ] * nint, dtype='S'), 0, nint)
    tb.putcol('FLAG_ROW', [
        False,
    ] * nint, 0, nint)
    tb.putcol('OBSERVER', [
        os.path.basename(__file__),
    ] * nint, 0, nint)
    tb.putcol('PROJECT', [
        station.name + ' all-sky',
    ] * nint, 0, nint)
    tb.putcol('RELEASE_DATE', [
        0.0,
    ] * nint, 0, nint)
    tb.putcol('SCHEDULE_TYPE', [
        'all-sky',
    ] * nint, 0, nint)
    tb.putcol('TELESCOPE_NAME', [
        station.name,
    ] * nint, 0, nint)

    tb.flush()
    tb.close()

    # Source

    col1 = tableutil.makearrcoldesc('DIRECTION',
                                    0.0,
                                    2,
                                    comment='Direction (e.g. RA, DEC).',
                                    keywords={
                                        'QuantumUnits': ['rad', 'rad'],
                                        'MEASINFO': {
                                            'type': 'direction',
                                            'Ref': 'J2000'
                                        }
                                    })
    col2 = tableutil.makearrcoldesc('PROPER_MOTION',
                                    0.0,
                                    2,
                                    comment='Proper motion',
                                    keywords={'QuantumUnits': [
                                        'rad/s',
                                    ]})
    col3 = tableutil.makescacoldesc(
        'CALIBRATION_GROUP',
        0,
        comment='Number of grouping for calibration purpose.')
    col4 = tableutil.makescacoldesc(
        'CODE',
        "none",
        comment='Special characteristics of source, e.g. Bandpass calibrator')
    col5 = tableutil.makescacoldesc(
        'INTERVAL',
        0.0,
        comment='Interval of time for which this set of parameters is accurate',
        keywords={'QuantumUnits': [
            's',
        ]})
    col6 = tableutil.makescacoldesc(
        'NAME', "none", comment='Name of source as given during observations')
    col7 = tableutil.makescacoldesc('NUM_LINES',
                                    0,
                                    comment='Number of spectral lines')
    col8 = tableutil.makescacoldesc('SOURCE_ID', 0, comment='Source id')
    col9 = tableutil.makescacoldesc(
        'SPECTRAL_WINDOW_ID', -1, comment='ID for this spectral window setup')
    col10 = tableutil.makescacoldesc(
        'TIME',
        0.0,
        comment=
        'Midpoint of time for which this set of parameters is accurate.',
        keywords={
            'QuantumUnits': [
                's',
            ],
            'MEASINFO': {
                'type': 'epoch',
                'Ref': 'UTC'
            }
        })
    col11 = tableutil.makearrcoldesc('TRANSITION',
                                     'none',
                                     1,
                                     comment='Line Transition name')
    col12 = tableutil.makearrcoldesc('REST_FREQUENCY',
                                     1.0,
                                     1,
                                     comment='Line rest frequency',
                                     keywords={
                                         'QuantumUnits': [
                                             'Hz',
                                         ],
                                         'MEASINFO': {
                                             'type': 'frequency',
                                             'Ref': 'LSRK'
                                         }
                                     })
    col13 = tableutil.makearrcoldesc('SYSVEL',
                                     1.0,
                                     1,
                                     comment='Systemic velocity at reference',
                                     keywords={
                                         'QuantumUnits': [
                                             'm/s',
                                         ],
                                         'MEASINFO': {
                                             'type': 'radialvelocity',
                                             'Ref': 'LSRK'
                                         }
                                     })

    desc = tableutil.maketabdesc([
        col1, col2, col3, col4, col5, col6, col7, col8, col9, col10, col11,
        col12, col13
    ])
    tb = table("%s/SOURCE" % filename, desc, nrow=nint, ack=False)

    tb.putcol('DIRECTION', numpy.zeros((nint, 1, 2)), 0, nint)
    tb.putcol('PROPER_MOTION', numpy.zeros((nint, 1, 2)), 0, nint)
    tb.putcol('CALIBRATION_GROUP', [
        0,
    ] * nint, 0, nint)
    tb.putcol('CODE', [
        'none',
    ] * nint, 0, nint)
    tb.putcol('INTERVAL', [
        tint,
    ] * nint, 0, nint)
    tb.putcol('NAME', [
        'zenith',
    ] * nint, 0, nint)
    tb.putcol('NUM_LINES', [
        0,
    ] * nint, 0, nint)
    tb.putcol('SOURCE_ID', [
        0,
    ] * nint, 0, nint)
    tb.putcol('SPECTRAL_WINDOW_ID', [
        -1,
    ] * nint, 0, nint)
    tb.putcol('TIME', [
        0.0,
    ] * nint, 0, nint)
    #tb.putcol('TRANSITION', []*nint, 0, nint)
    #tb.putcol('REST_FREQUENCY', []*nint, 0, nint)
    #tb.putcol('SYSVEL', []*nint, 0, nint)

    tb.flush()
    tb.close()

    # Field

    col1 = tableutil.makearrcoldesc(
        'DELAY_DIR',
        0.0,
        2,
        comment=
        'Direction of delay center (e.g. RA, DEC)as polynomial in time.',
        keywords={
            'QuantumUnits': ['rad', 'rad'],
            'MEASINFO': {
                'type': 'direction',
                'Ref': 'J2000'
            }
        })
    col2 = tableutil.makearrcoldesc(
        'PHASE_DIR',
        0.0,
        2,
        comment='Direction of phase center (e.g. RA, DEC).',
        keywords={
            'QuantumUnits': ['rad', 'rad'],
            'MEASINFO': {
                'type': 'direction',
                'Ref': 'J2000'
            }
        })
    col3 = tableutil.makearrcoldesc(
        'REFERENCE_DIR',
        0.0,
        2,
        comment=
        'Direction of REFERENCE center (e.g. RA, DEC).as polynomial in time.',
        keywords={
            'QuantumUnits': ['rad', 'rad'],
            'MEASINFO': {
                'type': 'direction',
                'Ref': 'J2000'
            }
        })
    col4 = tableutil.makescacoldesc(
        'CODE',
        "none",
        comment='Special characteristics of field, e.g. Bandpass calibrator')
    col5 = tableutil.makescacoldesc('FLAG_ROW', False, comment='Row Flag')
    col6 = tableutil.makescacoldesc('NAME',
                                    "none",
                                    comment='Name of this field')
    col7 = tableutil.makescacoldesc('NUM_POLY',
                                    0,
                                    comment='Polynomial order of _DIR columns')
    col8 = tableutil.makescacoldesc('SOURCE_ID', 0, comment='Source id')
    col9 = tableutil.makescacoldesc(
        'TIME',
        0.0,
        comment='Time origin for direction and rate',
        keywords={
            'QuantumUnits': [
                's',
            ],
            'MEASINFO': {
                'type': 'epoch',
                'Ref': 'UTC'
            }
        })

    desc = tableutil.maketabdesc(
        [col1, col2, col3, col4, col5, col6, col7, col8, col9])
    tb = table("%s/FIELD" % filename, desc, nrow=nint, ack=False)

    tb.putcol('DELAY_DIR', numpy.zeros((nint, 1, 2)), 0, nint)
    tb.putcol('PHASE_DIR', numpy.zeros((nint, 1, 2)), 0, nint)
    tb.putcol('REFERENCE_DIR', numpy.zeros((nint, 1, 2)), 0, nint)
    tb.putcol('CODE', [
        'none',
    ] * nint, 0, nint)
    tb.putcol('FLAG_ROW', [
        False,
    ] * nint, 0, nint)
    tb.putcol('NAME', [
        'zenith',
    ] * nint, 0, nint)
    tb.putcol('NUM_POLY', [
        0,
    ] * nint, 0, nint)
    tb.putcol('SOURCE_ID', list(range(nint)), 0, nint)
    tb.putcol('TIME', [
        0.0,
    ] * nint, 0, nint)

    tb.flush()
    tb.close()
Exemplo n.º 8
0
def _write_polarization_table(filename, config):
    """
    Write the polarization table.
    """

    station = config.station
    nant = config.nant
    nbl = config.nbl
    tint = config.tint
    freq = config.freq
    nchan = config.nchan
    pols = config.pols
    npol = config.npol
    nint = config.nint

    # Polarization

    stks = numpy.array([STOKES_CODES[p] for p in pols])
    prds = numpy.zeros((2, npol), dtype=numpy.int32)
    for i in range(stks.size):
        stk = stks[i]
        if stk > 4:
            prds[0, i] = ((stk - 1) % 4) / 2
            prds[1, i] = ((stk - 1) % 4) % 2
        else:
            prds[0, i] = 1
            prds[1, i] = 1

    col1 = tableutil.makearrcoldesc(
        'CORR_TYPE',
        0,
        1,
        comment=
        'The polarization type for each correlation product, as a Stokes enum.'
    )
    col2 = tableutil.makearrcoldesc(
        'CORR_PRODUCT',
        0,
        2,
        comment='Indices describing receptors of feed going into correlation')
    col3 = tableutil.makescacoldesc('FLAG_ROW', False, comment='flag')
    col4 = tableutil.makescacoldesc('NUM_CORR',
                                    npol,
                                    comment='Number of correlation products')

    desc = tableutil.maketabdesc([col1, col2, col3, col4])
    tb = table("%s/POLARIZATION" % filename, desc, nrow=1, ack=False)

    tb.putcell('CORR_TYPE', 0, stks)
    tb.putcell('CORR_PRODUCT', 0, prds.T)
    tb.putcell('FLAG_ROW', 0, False)
    tb.putcell('NUM_CORR', 0, npol)

    tb.flush()
    tb.close()

    # Feed

    col1 = tableutil.makearrcoldesc(
        'POSITION',
        0.0,
        1,
        comment='Position of feed relative to feed reference position',
        keywords={
            'QuantumUnits': ['m', 'm', 'm'],
            'MEASINFO': {
                'type': 'position',
                'Ref': 'ITRF'
            }
        })
    col2 = tableutil.makearrcoldesc(
        'BEAM_OFFSET',
        0.0,
        2,
        comment='Beam position offset (on sky but in antennareference frame)',
        keywords={
            'QuantumUnits': ['rad', 'rad'],
            'MEASINFO': {
                'type': 'direction',
                'Ref': 'J2000'
            }
        })
    col3 = tableutil.makearrcoldesc(
        'POLARIZATION_TYPE',
        'X',
        1,
        comment='Type of polarization to which a given RECEPTOR responds')
    col4 = tableutil.makearrcoldesc(
        'POL_RESPONSE',
        1j,
        2,
        valuetype='complex',
        comment='D-matrix i.e. leakage between two receptors')
    col5 = tableutil.makearrcoldesc(
        'RECEPTOR_ANGLE',
        0.0,
        1,
        comment='The reference angle for polarization',
        keywords={'QuantumUnits': [
            'rad',
        ]})
    col6 = tableutil.makescacoldesc('ANTENNA_ID',
                                    0,
                                    comment='ID of antenna in this array')
    col7 = tableutil.makescacoldesc('BEAM_ID', -1, comment='Id for BEAM model')
    col8 = tableutil.makescacoldesc('FEED_ID', 0, comment='Feed id')
    col9 = tableutil.makescacoldesc(
        'INTERVAL',
        0.0,
        comment='Interval for which this set of parameters is accurate',
        keywords={'QuantumUnits': [
            's',
        ]})
    col10 = tableutil.makescacoldesc(
        'NUM_RECEPTORS',
        2,
        comment='Number of receptors on this feed (probably 1 or 2)')
    col11 = tableutil.makescacoldesc(
        'SPECTRAL_WINDOW_ID', -1, comment='ID for this spectral window setup')
    col12 = tableutil.makescacoldesc(
        'TIME',
        0.0,
        comment='Midpoint of time for which this set of parameters is accurate',
        keywords={
            'QuantumUnits': [
                's',
            ],
            'MEASINFO': {
                'type': 'epoch',
                'Ref': 'UTC'
            }
        })

    desc = tableutil.maketabdesc([
        col1, col2, col3, col4, col5, col6, col7, col8, col9, col10, col11,
        col12
    ])
    tb = table("%s/FEED" % filename, desc, nrow=nant, ack=False)

    presp = numpy.zeros((nant, 2, 2), dtype=numpy.complex64)
    if stks[0] > 8:
        ptype = [['X', 'Y'] for i in range(nant)]
        presp[:, 0, 0] = 1.0
        presp[:, 0, 1] = 0.0
        presp[:, 1, 0] = 0.0
        presp[:, 1, 1] = 1.0
    elif stks[0] > 4:
        ptype = [['R', 'L'] for i in range(nant)]
        presp[:, 0, 0] = 1.0
        presp[:, 0, 1] = -1.0j
        presp[:, 1, 0] = 1.0j
        presp[:, 1, 1] = 1.0
    else:
        ptype = [['X', 'Y'] for i in range(nant)]
        presp[:, 0, 0] = 1.0
        presp[:, 0, 1] = 0.0
        presp[:, 1, 0] = 0.0
        presp[:, 1, 1] = 1.0

    tb.putcol('POSITION', numpy.zeros((nant, 3)), 0, nant)
    tb.putcol('BEAM_OFFSET', numpy.zeros((nant, 2, 2)), 0, nant)
    tb.putcol('POLARIZATION_TYPE', numpy.array(ptype, dtype='S'), 0, nant)
    tb.putcol('POL_RESPONSE', presp, 0, nant)
    tb.putcol('RECEPTOR_ANGLE', numpy.zeros((nant, 2)), 0, nant)
    tb.putcol('ANTENNA_ID', list(range(nant)), 0, nant)
    tb.putcol('BEAM_ID', [
        -1,
    ] * nant, 0, nant)
    tb.putcol('FEED_ID', [
        0,
    ] * nant, 0, nant)
    tb.putcol('INTERVAL', [
        tint,
    ] * nant, 0, nant)
    tb.putcol('NUM_RECEPTORS', [
        2,
    ] * nant, 0, nant)
    tb.putcol('SPECTRAL_WINDOW_ID', [
        -1,
    ] * nant, 0, nant)
    tb.putcol('TIME', [
        0.0,
    ] * nant, 0, nant)

    tb.flush()
    tb.close()
Exemplo n.º 9
0
def _write_antenna_table(filename, config):
    """
    Write the antenna table.
    """

    station = config.station
    nant = config.nant
    nbl = config.nbl
    tint = config.tint
    freq = config.freq
    nchan = config.nchan
    pols = config.pols
    npol = config.npol
    nint = config.nint

    col1 = tableutil.makearrcoldesc(
        'OFFSET',
        0.0,
        1,
        comment='Axes offset of mount to FEED REFERENCE point',
        keywords={
            'QuantumUnits': ['m', 'm', 'm'],
            'MEASINFO': {
                'type': 'position',
                'Ref': 'ITRF'
            }
        })
    col2 = tableutil.makearrcoldesc(
        'POSITION',
        0.0,
        1,
        comment='Antenna X,Y,Z phase reference position',
        keywords={
            'QuantumUnits': ['m', 'm', 'm'],
            'MEASINFO': {
                'type': 'position',
                'Ref': 'ITRF'
            }
        })
    col3 = tableutil.makescacoldesc('TYPE',
                                    "ground-based",
                                    comment='Antenna type (e.g. SPACE-BASED)')
    col4 = tableutil.makescacoldesc('DISH_DIAMETER',
                                    2.0,
                                    comment='Physical diameter of dish',
                                    keywords={'QuantumUnits': [
                                        'm',
                                    ]})
    col5 = tableutil.makescacoldesc('FLAG_ROW',
                                    False,
                                    comment='Flag for this row')
    col6 = tableutil.makescacoldesc(
        'MOUNT', "alt-az", comment='Mount type e.g. alt-az, equatorial, etc.')
    col7 = tableutil.makescacoldesc('NAME',
                                    "none",
                                    comment='Antenna name, e.g. VLA22, CA03')
    col8 = tableutil.makescacoldesc('STATION',
                                    station.name,
                                    comment='Station (antenna pad) name')

    desc = tableutil.maketabdesc(
        [col1, col2, col3, col4, col5, col6, col7, col8])
    tb = table("%s/ANTENNA" % filename, desc, nrow=nant, ack=False)

    tb.putcol('OFFSET', numpy.zeros((nant, 3)), 0, nant)
    tb.putcol('TYPE', ['GROUND-BASED,'] * nant, 0, nant)
    tb.putcol('DISH_DIAMETER', [
        2.0,
    ] * nant, 0, nant)
    tb.putcol('FLAG_ROW', [
        False,
    ] * nant, 0, nant)
    tb.putcol('MOUNT', [
        'ALT-AZ',
    ] * nant, 0, nant)
    tb.putcol('NAME', ['LWA%03i' % ant.id for ant in station.antennas], 0,
              nant)
    tb.putcol('STATION', [
        station.name,
    ] * nant, 0, nant)

    for i, ant in enumerate(station.antennas):
        #tb.putcell('OFFSET', i, [0.0, 0.0, 0.0])
        tb.putcell('POSITION', i, ant.ecef)
        #tb.putcell('TYPE', i, 'GROUND-BASED')
        #tb.putcell('DISH_DIAMETER', i, 2.0)
        #tb.putcell('FLAG_ROW', i, False)
        #tb.putcell('MOUNT', i, 'ALT-AZ')
        #tb.putcell('NAME', i, ant.get_name())
        #tb.putcell('STATION', i, station.name)

    tb.flush()
    tb.close()
Exemplo n.º 10
0
def _write_main_table(filename, config):
    """
    Write the main data table.
    """

    station = config.station
    nant = config.nant
    nbl = config.nbl
    tint = config.tint
    freq = config.freq
    nchan = config.nchan
    pols = config.pols
    npol = config.npol
    nint = config.nint

    col1 = tableutil.makearrcoldesc(
        'UVW',
        0.0,
        1,
        comment='Vector with uvw coordinates (in meters)',
        keywords={
            'QuantumUnits': ['m', 'm', 'm'],
            'MEASINFO': {
                'type': 'uvw',
                'Ref': 'ITRF'
            }
        })
    col2 = tableutil.makearrcoldesc(
        'FLAG',
        False,
        2,
        comment='The data flags, array of bools with same shape as data')
    col3 = tableutil.makearrcoldesc(
        'FLAG_CATEGORY',
        False,
        3,
        comment='The flag category, NUM_CAT flags for each datum',
        keywords={'CATEGORY': [
            '',
        ]})
    col4 = tableutil.makearrcoldesc(
        'WEIGHT',
        1.0,
        1,
        valuetype='float',
        comment='Weight for each polarization spectrum')
    col5 = tableutil.makearrcoldesc(
        'SIGMA',
        9999.,
        1,
        valuetype='float',
        comment='Estimated rms noise for channel with unity bandpass response')
    col6 = tableutil.makescacoldesc(
        'ANTENNA1', 0, comment='ID of first antenna in interferometer')
    col7 = tableutil.makescacoldesc(
        'ANTENNA2', 0, comment='ID of second antenna in interferometer')
    col8 = tableutil.makescacoldesc('ARRAY_ID',
                                    0,
                                    comment='ID of array or subarray')
    col9 = tableutil.makescacoldesc('DATA_DESC_ID',
                                    0,
                                    comment='The data description table index')
    col10 = tableutil.makescacoldesc('EXPOSURE',
                                     0.0,
                                     comment='he effective integration time',
                                     keywords={'QuantumUnits': [
                                         's',
                                     ]})
    col11 = tableutil.makescacoldesc('FEED1',
                                     0,
                                     comment='The feed index for ANTENNA1')
    col12 = tableutil.makescacoldesc('FEED2',
                                     0,
                                     comment='The feed index for ANTENNA2')
    col13 = tableutil.makescacoldesc('FIELD_ID',
                                     0,
                                     comment='Unique id for this pointing')
    col14 = tableutil.makescacoldesc(
        'FLAG_ROW',
        False,
        comment='Row flag - flag all data in this row if True')
    col15 = tableutil.makescacoldesc('INTERVAL',
                                     0.0,
                                     comment='The sampling interval',
                                     keywords={'QuantumUnits': [
                                         's',
                                     ]})
    col16 = tableutil.makescacoldesc(
        'OBSERVATION_ID',
        0,
        comment='ID for this observation, index in OBSERVATION table')
    col17 = tableutil.makescacoldesc(
        'PROCESSOR_ID',
        -1,
        comment='Id for backend processor, index in PROCESSOR table')
    col18 = tableutil.makescacoldesc(
        'SCAN_NUMBER', 1, comment='Sequential scan number from on-line system')
    col19 = tableutil.makescacoldesc('STATE_ID',
                                     -1,
                                     comment='ID for this observing state')
    col20 = tableutil.makescacoldesc('TIME',
                                     0.0,
                                     comment='Modified Julian Day',
                                     keywords={
                                         'QuantumUnits': [
                                             's',
                                         ],
                                         'MEASINFO': {
                                             'type': 'epoch',
                                             'Ref': 'UTC'
                                         }
                                     })
    col21 = tableutil.makescacoldesc('TIME_CENTROID',
                                     0.0,
                                     comment='Modified Julian Day',
                                     keywords={
                                         'QuantumUnits': [
                                             's',
                                         ],
                                         'MEASINFO': {
                                             'type': 'epoch',
                                             'Ref': 'UTC'
                                         }
                                     })
    col22 = tableutil.makearrcoldesc("DATA",
                                     0j,
                                     2,
                                     valuetype='complex',
                                     comment='The data column')

    desc = tableutil.maketabdesc([
        col1, col2, col3, col4, col5, col6, col7, col8, col9, col10, col11,
        col12, col13, col14, col15, col16, col17, col18, col19, col20, col21,
        col22
    ])
    tb = table("%s" % filename, desc, nrow=nint * nbl, ack=False)

    fg = numpy.zeros((nint * nbl, npol, nchan), dtype=numpy.bool)
    fc = numpy.zeros((nint * nbl, npol, nchan, 1), dtype=numpy.bool)
    uv = numpy.zeros((nint * nbl, 3), dtype=numpy.float64)
    a1 = numpy.zeros((nint * nbl, ), dtype=numpy.int32)
    a2 = numpy.zeros((nint * nbl, ), dtype=numpy.int32)
    vs = numpy.zeros((nint * nbl, npol, nchan), dtype=numpy.complex64)
    wg = numpy.ones((nint * nbl, npol))
    sg = numpy.ones((nint * nbl, npol)) * 9999

    k = 0
    base_uvw = get_zenith_uvw(station,
                              LWATime.now())  # Kind of an interesting choice
    for t in range(nint):
        uv[t * nbl:(t + 1) * nbl, :] = base_uvw

        for i in range(nant):
            for j in range(i, nant):
                a1[k] = i
                a2[k] = j
                k += 1

    tb.putcol('UVW', uv, 0, nint * nbl)
    tb.putcol('FLAG', fg.transpose(0, 2, 1), 0, nint * nbl)
    tb.putcol('FLAG_CATEGORY', fc.transpose(0, 3, 2, 1), 0, nint * nbl)
    tb.putcol('WEIGHT', wg, 0, nint * nbl)
    tb.putcol('SIGMA', sg, 0, nint * nbl)
    tb.putcol('ANTENNA1', a1, 0, nint * nbl)
    tb.putcol('ANTENNA2', a2, 0, nint * nbl)
    tb.putcol('ARRAY_ID', [
        0,
    ] * nint * nbl, 0, nint * nbl)
    tb.putcol('DATA_DESC_ID', [
        0,
    ] * nint * nbl, 0, nint * nbl)
    tb.putcol('EXPOSURE', [
        tint,
    ] * nint * nbl, 0, nint * nbl)
    tb.putcol('FEED1', [
        0,
    ] * nint * nbl, 0, nint * nbl)
    tb.putcol('FEED2', [
        0,
    ] * nint * nbl, 0, nint * nbl)
    tb.putcol('FIELD_ID', [i for i in range(nint) for j in range(nbl)], 0,
              nint * nbl)
    tb.putcol('FLAG_ROW', [
        False,
    ] * nint * nbl, 0, nint * nbl)
    tb.putcol('INTERVAL', [
        tint,
    ] * nint * nbl, 0, nint * nbl)
    tb.putcol('OBSERVATION_ID', [i for i in range(nint) for j in range(nbl)],
              0, nint * nbl)
    tb.putcol('PROCESSOR_ID', [
        -1,
    ] * nint * nbl, 0, nint * nbl)
    tb.putcol('SCAN_NUMBER', [i + 1 for i in range(nint) for j in range(nbl)],
              0, nint * nbl)
    tb.putcol('STATE_ID', [
        -1,
    ] * nint * nbl, 0, nint * nbl)
    tb.putcol('TIME', [
        0.0,
    ] * nint * nbl, 0, nint * nbl)
    tb.putcol('TIME_CENTROID', [
        0.0,
    ] * nint * nbl, 0, nint * nbl)
    tb.putcol('DATA', vs.transpose(0, 2, 1), 0, nint * nbl)

    tb.flush()
    tb.close()

    # Data description

    col1 = tableutil.makescacoldesc('FLAG_ROW', False, comment='Flag this row')
    col2 = tableutil.makescacoldesc('POLARIZATION_ID',
                                    0,
                                    comment='Pointer to polarization table')
    col3 = tableutil.makescacoldesc('SPECTRAL_WINDOW_ID',
                                    0,
                                    comment='Pointer to spectralwindow table')

    desc = tableutil.maketabdesc([col1, col2, col3])
    tb = table("%s/DATA_DESCRIPTION" % filename, desc, nrow=nint, ack=False)

    tb.putcol('FLAG_ROW', [
        0,
    ] * nint, 0, nint)
    tb.putcol('POLARIZATION_ID', [
        0,
    ] * nint, 0, nint)
    tb.putcol('SPECTRAL_WINDOW_ID', [
        0,
    ] * nint, 0, nint)

    tb.flush()
    tb.close()
Exemplo n.º 11
0
def _write_misc_required_tables(filename, config):
    station = config.station
    nant = config.nant
    nbl = config.nbl
    tint = config.tint
    freq = config.freq
    nchan = config.nchan
    pols = config.pols
    npol = config.npol
    nint = config.nint

    # Flag command

    col1 = tableutil.makescacoldesc(
        'TIME',
        0.0,
        comment='Midpoint of interval for which this flag is valid',
        keywords={
            'QuantumUnits': [
                's',
            ],
            'MEASINFO': {
                'type': 'epoch',
                'Ref': 'UTC'
            }
        })
    col2 = tableutil.makescacoldesc(
        'INTERVAL',
        0.0,
        comment='Time interval for which this flag is valid',
        keywords={'QuantumUnits': [
            's',
        ]})
    col3 = tableutil.makescacoldesc('TYPE',
                                    'flag',
                                    comment='Type of flag (FLAG or UNFLAG)')
    col4 = tableutil.makescacoldesc('REASON', 'reason', comment='Flag reason')
    col5 = tableutil.makescacoldesc('LEVEL',
                                    0,
                                    comment='Flag level - revision level')
    col6 = tableutil.makescacoldesc('SEVERITY',
                                    0,
                                    comment='Severity code (0-10)')
    col7 = tableutil.makescacoldesc(
        'APPLIED',
        False,
        comment='True if flag has been applied to main table')
    col8 = tableutil.makescacoldesc('COMMAND',
                                    'command',
                                    comment='Flagging command')

    desc = tableutil.maketabdesc(
        [col1, col2, col3, col4, col5, col6, col7, col8])
    tb = table("%s/FLAG_CMD" % filename, desc, nrow=0, ack=False)

    tb.flush()
    tb.close()

    # History

    col1 = tableutil.makescacoldesc('TIME',
                                    0.0,
                                    comment='Timestamp of message',
                                    keywords={
                                        'QuantumUnits': [
                                            's',
                                        ],
                                        'MEASINFO': {
                                            'type': 'epoch',
                                            'Ref': 'UTC'
                                        }
                                    })
    col2 = tableutil.makescacoldesc(
        'OBSERVATION_ID',
        0,
        comment='Observation id (index in OBSERVATION table)')
    col3 = tableutil.makescacoldesc('MESSAGE',
                                    'message',
                                    comment='Log message')
    col4 = tableutil.makescacoldesc('PRIORITY',
                                    'NORMAL',
                                    comment='Message priority')
    col5 = tableutil.makescacoldesc(
        'ORIGIN',
        'origin',
        comment='(Source code) origin from which message originated')
    col6 = tableutil.makescacoldesc('OBJECT_ID',
                                    0,
                                    comment='Originating ObjectID')
    col7 = tableutil.makescacoldesc('APPLICATION',
                                    'application',
                                    comment='Application name')
    col8 = tableutil.makearrcoldesc('CLI_COMMAND',
                                    'command',
                                    1,
                                    comment='CLI command sequence')
    col9 = tableutil.makearrcoldesc('APP_PARAMS',
                                    'params',
                                    1,
                                    comment='Application parameters')

    desc = tableutil.maketabdesc(
        [col1, col2, col3, col4, col5, col6, col7, col8, col9])
    tb = table("%s/HISTORY" % filename, desc, nrow=0, ack=False)

    tb.flush()
    tb.close()

    # POINTING

    col1 = tableutil.makescacoldesc('ANTENNA_ID', 0, comment='Antenna Id')
    col2 = tableutil.makescacoldesc('TIME',
                                    0.0,
                                    comment='Time interval midpoint',
                                    keywords={
                                        'QuantumUnits': [
                                            's',
                                        ],
                                        'MEASINFO': {
                                            'type': 'epoch',
                                            'Ref': 'UTC'
                                        }
                                    })
    col3 = tableutil.makescacoldesc('INTERVAL',
                                    0.0,
                                    comment='Time interval',
                                    keywords={'QuantumUnits': [
                                        's',
                                    ]})
    col4 = tableutil.makescacoldesc('NAME',
                                    'name',
                                    comment='Pointing position name')
    col5 = tableutil.makescacoldesc('NUM_POLY', 0, comment='Series order')
    col6 = tableutil.makescacoldesc('TIME_ORIGIN',
                                    0.0,
                                    comment='Time origin for direction',
                                    keywords={
                                        'QuantumUnits': [
                                            's',
                                        ],
                                        'MEASINFO': {
                                            'type': 'epoch',
                                            'Ref': 'UTC'
                                        }
                                    })
    col7 = tableutil.makearrcoldesc(
        'DIRECTION',
        0.0,
        2,
        comment='Antenna pointing direction as polynomial in time',
        keywords={
            'QuantumUnits': ['rad', 'rad'],
            'MEASINFO': {
                'type': 'direction',
                'Ref': 'J2000'
            }
        })
    col8 = tableutil.makearrcoldesc(
        'TARGET',
        0.0,
        2,
        comment='target direction as polynomial in time',
        keywords={
            'QuantumUnits': ['rad', 'rad'],
            'MEASINFO': {
                'type': 'direction',
                'Ref': 'J2000'
            }
        })
    col9 = tableutil.makescacoldesc(
        'TRACKING', True, comment='Tracking flag - True if on position')

    desc = tableutil.maketabdesc(
        [col1, col2, col3, col4, col5, col6, col7, col8, col9])
    tb = table("%s/POINTING" % filename, desc, nrow=0, ack=False)

    tb.flush()
    tb.close()

    # Processor

    col1 = tableutil.makescacoldesc('TYPE', 'type', comment='Processor type')
    col2 = tableutil.makescacoldesc('SUB_TYPE',
                                    'subtype',
                                    comment='Processor sub type')
    col3 = tableutil.makescacoldesc('TYPE_ID', 0, comment='Processor type id')
    col4 = tableutil.makescacoldesc('MODE_ID', 0, comment='Processor mode id')
    col5 = tableutil.makescacoldesc('FLAG_ROW', False, comment='flag')

    desc = tableutil.maketabdesc([col1, col2, col3, col4, col5])
    tb = table("%s/PROCESSOR" % filename, desc, nrow=0, ack=False)

    tb.flush()
    tb.close()

    # State

    col1 = tableutil.makescacoldesc('SIG',
                                    True,
                                    comment='True for a source observation')
    col2 = tableutil.makescacoldesc('REF',
                                    False,
                                    comment='True for a reference observation')
    col3 = tableutil.makescacoldesc('CAL',
                                    0.0,
                                    comment='Noise calibration temperature',
                                    keywords={'QuantumUnits': [
                                        'K',
                                    ]})
    col4 = tableutil.makescacoldesc('LOAD',
                                    0.0,
                                    comment='Load temperature',
                                    keywords={'QuantumUnits': [
                                        'K',
                                    ]})
    col5 = tableutil.makescacoldesc(
        'SUB_SCAN', 0, comment='Sub scan number, relative to scan number')
    col6 = tableutil.makescacoldesc(
        'OBS_MODE', 'mode', comment='Observing mode, e.g., OFF_SPECTRUM')
    col7 = tableutil.makescacoldesc('FLAG_ROW', False, comment='Row flag')

    desc = tableutil.maketabdesc([col1, col2, col3, col4, col5, col6, col7])
    tb = table("%s/STATE" % filename, desc, nrow=0, ack=False)

    tb.flush()
    tb.close()
Exemplo n.º 12
0
def _write_spectralwindow_table(filename, config):
    """
    Write the spectral window table.
    """

    station = config.station
    nant = config.nant
    nbl = config.nbl
    tint = config.tint
    freq = config.freq
    nchan = config.nchan
    chan_bw = config.chan_bw
    pols = config.pols
    npol = config.npol
    nint = config.nint

    # Spectral Window

    col1 = tableutil.makescacoldesc('MEAS_FREQ_REF',
                                    0,
                                    comment='Frequency Measure reference')
    col2 = tableutil.makearrcoldesc(
        'CHAN_FREQ',
        0.0,
        1,
        comment='Center frequencies for each channel in the data matrix',
        keywords={
            'QuantumUnits': [
                'Hz',
            ],
            'MEASINFO': {
                'type':
                'frequency',
                'VarRefCol':
                'MEAS_FREQ_REF',
                'TabRefTypes': [
                    'REST', 'LSRK', 'LSRD', 'BARY', 'GEO', 'TOPO', 'GALACTO',
                    'LGROUP', 'CMB', 'Undefined'
                ],
                'TabRefCodes':
                numpy.array([0, 1, 2, 3, 4, 5, 6, 7, 8, 64],
                            dtype=numpy.uint32)
            }
        })
    col3 = tableutil.makescacoldesc(
        'REF_FREQUENCY',
        freq[0],
        comment='The reference frequency',
        keywords={
            'QuantumUnits': [
                'Hz',
            ],
            'MEASINFO': {
                'type':
                'frequency',
                'VarRefCol':
                'MEAS_FREQ_REF',
                'TabRefTypes': [
                    'REST', 'LSRK', 'LSRD', 'BARY', 'GEO', 'TOPO', 'GALACTO',
                    'LGROUP', 'CMB', 'Undefined'
                ],
                'TabRefCodes':
                numpy.array([0, 1, 2, 3, 4, 5, 6, 7, 8, 64],
                            dtype=numpy.uint32)
            }
        })
    col4 = tableutil.makearrcoldesc('CHAN_WIDTH',
                                    0.0,
                                    1,
                                    comment='Channel width for each channel',
                                    keywords={'QuantumUnits': [
                                        'Hz',
                                    ]})
    col5 = tableutil.makearrcoldesc(
        'EFFECTIVE_BW',
        0.0,
        1,
        comment='Effective noise bandwidth of each channel',
        keywords={'QuantumUnits': [
            'Hz',
        ]})
    col6 = tableutil.makearrcoldesc(
        'RESOLUTION',
        0.0,
        1,
        comment='The effective noise bandwidth for each channel',
        keywords={'QuantumUnits': [
            'Hz',
        ]})
    col7 = tableutil.makescacoldesc('FLAG_ROW', False, comment='flag')
    col8 = tableutil.makescacoldesc('FREQ_GROUP', 1, comment='Frequency group')
    col9 = tableutil.makescacoldesc('FREQ_GROUP_NAME',
                                    "group1",
                                    comment='Frequency group name')
    col10 = tableutil.makescacoldesc('IF_CONV_CHAIN',
                                     0,
                                     comment='The IF conversion chain number')
    col11 = tableutil.makescacoldesc('NAME',
                                     "%i channels" % nchan,
                                     comment='Spectral window name')
    col12 = tableutil.makescacoldesc('NET_SIDEBAND', 0, comment='Net sideband')
    col13 = tableutil.makescacoldesc('NUM_CHAN',
                                     0,
                                     comment='Number of spectral channels')
    col14 = tableutil.makescacoldesc(
        'TOTAL_BANDWIDTH',
        0.0,
        comment='The total bandwidth for this window',
        keywords={'QuantumUnits': [
            'Hz',
        ]})

    desc = tableutil.maketabdesc([
        col1, col2, col3, col4, col5, col6, col7, col8, col9, col10, col11,
        col12, col13, col14
    ])
    tb = table("%s/SPECTRAL_WINDOW" % filename, desc, nrow=1, ack=False)

    tb.putcell('MEAS_FREQ_REF', 0, 0)
    tb.putcell('CHAN_FREQ', 0, freq)
    tb.putcell('REF_FREQUENCY', 0, freq[0])
    tb.putcell('CHAN_WIDTH', 0, [
        chan_bw,
    ] * nchan)
    tb.putcell('EFFECTIVE_BW', 0, [
        chan_bw,
    ] * nchan)
    tb.putcell('RESOLUTION', 0, [
        chan_bw,
    ] * nchan)
    tb.putcell('FLAG_ROW', 0, False)
    tb.putcell('FREQ_GROUP', 0, 1)
    tb.putcell('FREQ_GROUP_NAME', 0, 'group%i' % 1)
    tb.putcell('IF_CONV_CHAIN', 0, 0)
    tb.putcell('NAME', 0, "IF %i, %i channels" % (1, nchan))
    tb.putcell('NET_SIDEBAND', 0, 0)
    tb.putcell('NUM_CHAN', 0, nchan)
    tb.putcell('TOTAL_BANDWIDTH', 0, nchan * chan_bw)

    tb.flush()
    tb.close()