Functions
def	fixvis
def	get_validcodes
def	is_valid_refcode
def	log_phasecenter
def	get_oldref
def	modify_fld_vis
def	parse_phasecenter

Function Documentation

def task_fixvis.fixvis	(	vis,
		outputvis = `''`,
		field = `''`,
		refcode = `''`,
		reuse = `True`,
		phasecenter = `''`,
		datacolumn = `'all'`
	)

Input Parameters
vis        -- Name of the input visibility set

outputvis  -- Name of the output visibility set, default: same as vis

field      -- field selection string

refcode    -- Reference frame to convert to,
              default: the refcode of PHASE_DIR in the FIELD table
              example: 'B1950'

reuse      -- base recalculation on existing UVW coordinates? default=True
              ignored if parameter 'phasecenter' is set

phasecenter  --  if set to a valid direction: change the phase center for the given field
                 to this value
                 example: 'J2000 9h25m00s 05d12m00s'
                 If given without the equinox, e.g. '0h01m00s 00d12m00s', the parameter
                 is interpreted as a pair of offsets in RA and DEC to the present phasecenter.

datacolumn -- when applying a phase center shift, modify visibilities only in this/these column(s)
              default: 'all' (DATA, CORRECTED, and MODEL)
              example: 'DATA,CORRECTED' (will not modify MODEL)

Examples:

fixvis('NGC3256.ms','NGC3256-fixed.ms')
      will recalculate the UVW coordinates for all fields based on the existing
      phase center information in the FIELD table.

fixvis('0925+0512.ms','0925+0512-fixed.ms','0925+0512', '', 'J2000 9h25m00s 05d12m00s')
      will set the phase center for field '0925+0512' to the given direction and recalculate
      the UVW coordinates.

Definition at line 4 of file task_fixvis.py.

References taskinit.gentools(), get_oldref(), get_validcodes(), modify_fld_vis(), and taskinit.write_history().

def task_fixvis.get_oldref	(	outputvis,
		tbt
	)

Returns the original reference code, string, ckwdict, and isvarref.

Definition at line 202 of file task_fixvis.py.

References modify_fld_vis().

Referenced by fixvis().

def task_fixvis.get_validcodes ( code = None )

Returns a list of valid refcodes.

Definition at line 174 of file task_fixvis.py.

Referenced by fixvis(), is_valid_refcode(), and modify_fld_vis().

def task_fixvis.is_valid_refcode ( refcode )

Is refcode usable?

Definition at line 189 of file task_fixvis.py.

References get_validcodes().

Referenced by modify_fld_vis().

def task_fixvis.log_phasecenter	(	oldnew,
		refstr,
		ra,
		dec
	)

Post a phase center to the logger, along with whether it is old or new.

Definition at line 194 of file task_fixvis.py.

Referenced by modify_fld_vis().

def task_fixvis.modify_fld_vis	(	fld,
		outputvis,
		tbt,
		myim,
		commonoldrefstr,
		phasecenter,
		therefcode,
		reuse,
		numfields,
		ckwdict,
		theoldref,
		theoldrefstr,
		isvarref,
		flddict,
		datacol
	)

Modify the UVW and visibilities of field fld.

Definition at line 229 of file task_fixvis.py.

References get_validcodes(), is_valid_refcode(), log_phasecenter(), and parse_phasecenter().

Referenced by fixvis(), and get_oldref().

def task_fixvis.parse_phasecenter	(	phasecenter,
		isvarref,
		ref,
		refstr,
		theolddir
	)

Definition at line 406 of file task_fixvis.py.

Referenced by modify_fld_vis().

Functions

Function Documentation