def __compile(self):
# infiles
if isinstance(self.infiles, str):
self.infiles = [self.infiles]
# scantable for temporary use
tmpst = sd.scantable(self.infiles[0], False)
# scanlist
#self.scans = sdutil._to_list(self.scanlist, int)
self.scans = tmpst.parse_idx_selection("SCAN", self.scanno)
# pollist
#self.pols = sdutil._to_list(self.pollist, int)
self.pols = tmpst.parse_idx_selection("POL", self.polno)
# spw
if (self.spw.strip() == '-1'):
self.ifno = tmpst.getif(0)
else:
masklist = tmpst.parse_spw_selection(self.spw)
if len(masklist) == 0:
raise ValueError, "Invalid spectral window selection. Selection contains no data."
self.ifno = masklist.keys()[0]
# outfile
self.outname = sdutil.get_default_outfile_name(self.infiles[0],
self.outfile,
self.suffix)
sdutil.assert_outfile_canoverwrite_or_nonexistent(self.outname,
'ASAP',
self.overwrite)
# nx and ny
(self.nx, self.ny) = sdutil.get_nx_ny(self.npix)
# cellx and celly
(self.cellx, self.celly) = sdutil.get_cellx_celly(self.cell)
# map center
self.mapcenter = sdutil.get_map_center(self.center)
del tmpst
def __compile(self):
# infiles
if isinstance(self.infiles, str):
self.infiles = [self.infiles]
# scantable for temporary use
tmpst = sd.scantable(self.infiles[0], False)
# scanlist
#self.scans = sdutil._to_list(self.scanlist, int)
self.scans = tmpst.parse_idx_selection("SCAN", self.scanno)
# pollist
#self.pols = sdutil._to_list(self.pollist, int)
self.pols = tmpst.parse_idx_selection("POL", self.polno)
# spw
if (self.spw.strip() == '-1'):
self.ifno = tmpst.getif(0)
else:
masklist = tmpst.parse_spw_selection(self.spw)
if len(masklist) == 0:
raise ValueError, "Invalid spectral window selection. Selection contains no data."
self.ifno = masklist.keys()[0]
# outfile
self.outname = sdutil.get_default_outfile_name(self.infiles[0],
self.outfile,
self.suffix)
sdutil.assert_outfile_canoverwrite_or_nonexistent(
self.outname, 'ASAP', self.overwrite)
# nx and ny
(self.nx, self.ny) = sdutil.get_nx_ny(self.npix)
# cellx and celly
(self.cellx, self.celly) = sdutil.get_cellx_celly(self.cell)
# map center
self.mapcenter = sdutil.get_map_center(self.center)
del tmpst
def __compile_for_imaging(self):
# pointing data column to use
#if pointingcolumn.upper()=="OFFSET":
# pointingcolumn="POINTING_OFFSET"
# check ephemsrcname and set a proper source name if not given
if self.ephemsrcname == '':
# assume single source/field
# try determine if it is a known ephemeris source
self.open_table(self.source_table)
src = self.table.getcol('NAME')
self.close_table()
src = src[0]
if src.upper() in self.ephemobjs:
self.ephemsrcname = src
# imsize
(self.nx, self.ny) = sdutil.get_nx_ny(self.imsize)
# cell size
(self.cellx, self.celly) = sdutil.get_cellx_celly(self.cell,
unit='arcmin')
if self.cellx == '' or self.celly == '':
msg='Unrecognized quantity for cell'
raise Exception, msg
if self.phasecenter =='' and len(self.ephemsrcname)>0:
# if phasecenter is undefined and if it is a moving source,
# the phasecneter is set to the position of the moving source
# at the time of the first data in the POINTING table.
if self.pointingcolumn.upper() =='POINTING_OFFSET':
self.phasecenter='AZELGEO 0d0m 0d0m'
else:
self.open_table(self.observation_table)
telname = self.table.getcol('TELESCOPE_NAME')
self.close_table()
self.open_table(self.pointing_table)
t = self.table.getcol('TIME')
self.close_table()
me.doframe(me.observatory(telname[0]))
me.doframe(me.epoch('utc',str(t[0])+'s'))
self.phasecenter = me.measure(me.direction(self.ephemsrcname),'AZELGEO')
def _configure_map_property(self):
selection_ids = self.get_selection_idx_for_ms(self.sorted_idx[0])
# stokes
if self.stokes == '':
self.stokes = 'I'
self.imager_param['stokes'] = self.stokes
# gridfunction
# outfile
if os.path.exists(self.outfile) and self.overwrite:
os.system('rm -rf %s' % (self.outfile))
if os.path.exists(self.outfile + '.weight') and self.overwrite:
os.system('rm -rf %s' % (self.outfile + '.weight'))
# cell
cell = self.cell
if cell == '' or cell[0] == '':
# Calc PB
grid_factor = 3.
casalog.post(
"The cell size will be calculated using PB size of antennas in the first MS"
)
qPB = self._calc_PB(selection_ids['antenna1'])
cell = '%f%s' % (qPB['value'] / grid_factor, qPB['unit'])
casalog.post("Using cell size = PB/%4.2F = %s" %
(grid_factor, cell))
(cellx, celly) = sdutil.get_cellx_celly(cell, unit='arcmin')
self.imager_param['cellx'] = cellx
self.imager_param['celly'] = celly
# Calculate Pointing center and extent (if necessary)
# return a dictionary with keys 'center', 'width', 'height'
#imsize = self.imsize
imsize = sdutil._to_list(self.imsize, int) or \
sdutil._to_list(self.imsize, numpy.integer)
if imsize is None:
imsize = self.imsize if hasattr(self.imsize,
'__iter__') else [self.imsize]
imsize = [int(numpy.ceil(v)) for v in imsize]
casalog.post(
"imsize is not integers. force converting to integer pixel numbers.",
priority="WARN")
casalog.post("rounded-up imsize: %s --> %s" %
(str(self.imsize), str(imsize)))
phasecenter = self.phasecenter
if self.phasecenter == "" or \
len(imsize) == 0 or imsize[0] < 1:
map_param = self._get_pointing_extent()
# imsize
if len(imsize) == 0 or imsize[0] < 1:
imsize = self._get_imsize(map_param['width'],
map_param['height'], cellx, celly)
if self.phasecenter != "":
casalog.post(
"You defined phasecenter but not imsize. The image will cover as wide area as pointing in MS extends, but be centered at phasecenter. This could result in a strange image if your phasecenter is a part from the center of pointings",
priority='WARN')
if imsize[0] > 1024 or imsize[1] > 1024:
casalog.post(
"The calculated image pixel number is larger than 1024. It could take time to generate the image depending on your computer resource. Please wait...",
priority='WARN')
# phasecenter
# if empty, it should be determined here...
if self.phasecenter == "":
phasecenter = map_param['center']
# imsize
(nx, ny) = sdutil.get_nx_ny(imsize)
self.imager_param['nx'] = nx
self.imager_param['ny'] = ny
# phasecenter
self.imager_param['phasecenter'] = phasecenter
self.imager_param['movingsource'] = self.ephemsrcname
# channel map
imhelper = cleanhelper(self.imager, self.infiles, casalog=casalog)
imhelper.sortvislist(self.spw, self.mode, self.width)
spwsel = str(',').join([str(spwid) for spwid in selection_ids['spw']])
srestf = self.imager_param['restfreq'] if is_string_type(
self.imager_param['restfreq']
) else "%fHz" % self.imager_param['restfreq']
(imnchan, imstart, imwidth) = imhelper.setChannelizeDefault(
self.mode, spwsel, self.field, self.nchan, self.start, self.width,
self.imager_param['outframe'], self.veltype,
self.imager_param['phasecenter'], srestf)
del imhelper
# start and width
if self.mode == 'velocity':
startval = [self.imager_param['outframe'], imstart]
widthval = imwidth
elif self.mode == 'frequency':
startval = [self.imager_param['outframe'], imstart]
widthval = imwidth
else: #self.mode==channel
startval = int(self.start)
widthval = int(self.width)
if self.nchan < 0: self.nchan = self.allchannels
self.imager_param['start'] = startval
self.imager_param['step'] = widthval
self.imager_param['nchan'] = imnchan #self.nchan
def _configure_map_property(self):
selection_ids = self.get_selection_idx_for_ms(self.sorted_idx[0])
# stokes
if self.stokes == '':
self.stokes = 'I'
self.imager_param['stokes'] = self.stokes
# gridfunction
# outfile
if os.path.exists(self.outfile) and self.overwrite:
os.system('rm -rf %s'%(self.outfile))
if os.path.exists(self.outfile+'.weight') and self.overwrite:
os.system('rm -rf %s'%(self.outfile+'.weight'))
# cell
cell = self.cell
if cell == '' or cell[0] == '':
# Calc PB
grid_factor = 3.
casalog.post("The cell size will be calculated using PB size of antennas in the first MS")
qPB = self._calc_PB(selection_ids['antenna1'])
cell = '%f%s' % (qPB['value']/grid_factor, qPB['unit'])
casalog.post("Using cell size = PB/%4.2F = %s" % (grid_factor, cell))
(cellx,celly) = sdutil.get_cellx_celly(cell, unit='arcmin')
self.imager_param['cellx'] = cellx
self.imager_param['celly'] = celly
# Calculate Pointing center and extent (if necessary)
# return a dictionary with keys 'center', 'width', 'height'
imsize = self.imsize
phasecenter = self.phasecenter
if self.phasecenter == "" or \
len(self.imsize) == 0 or self.imsize[0] < 1:
map_param = self._get_pointing_extent()
# imsize
if len(imsize) == 0 or imsize[0] < 1:
imsize = self._get_imsize(map_param['width'], map_param['height'], cellx, celly)
if self.phasecenter != "":
casalog.post("You defined phasecenter but not imsize. The image will cover as wide area as pointing in MS extends, but be centered at phasecenter. This could result in a strange image if your phasecenter is a part from the center of pointings", priority='warn')
if imsize[0] > 1024 or imsize[1] > 1024:
casalog.post("The calculated image pixel number is larger than 1024. It could take time to generate the image depending on your computer resource. Please wait...", priority='warn')
# phasecenter
# if empty, it should be determined here...
if self.phasecenter == "":
phasecenter = map_param['center']
# imsize
(nx,ny) = sdutil.get_nx_ny(imsize)
self.imager_param['nx'] = nx
self.imager_param['ny'] = ny
# phasecenter
self.imager_param['phasecenter'] = phasecenter
self.imager_param['movingsource'] = self.ephemsrcname
# channel map
imhelper = cleanhelper(self.imager, self.infiles, casalog=casalog)
imhelper.sortvislist(self.spw, self.mode, self.width)
spwsel = str(',').join([str(spwid) for spwid in selection_ids['spw']])
srestf = self.imager_param['restfreq'] if is_string_type(self.imager_param['restfreq']) else "%fHz" % self.imager_param['restfreq']
(imnchan, imstart, imwidth) = imhelper.setChannelizeDefault(self.mode, spwsel, self.field, self.nchan, self.start, self.width, self.imager_param['outframe'], self.veltype,self.imager_param['phasecenter'], srestf)
del imhelper
# start and width
if self.mode == 'velocity':
startval = [self.imager_param['outframe'], imstart]
widthval = imwidth
elif self.mode == 'frequency':
startval = [self.imager_param['outframe'], imstart]
widthval = imwidth
else: #self.mode==channel
startval = int(self.start)
widthval = int(self.width)
if self.nchan < 0: self.nchan = self.allchannels
self.imager_param['start'] = startval
self.imager_param['step'] = widthval
self.imager_param['nchan'] = imnchan #self.nchan
