task_ft Namespace Reference

Functions
def	ft

---

Function Documentation

def task_ft.ft	(		vis = None,
			field = None,
			spw = None,
			model = None,
			nterms = None,
			reffreq = None,
			complist = None,
			incremental = None,
			usescratch = None
	)

Insert a source model into the MODEL_DATA column of a visibility set:

A source model (souce.model image) or components list is converted into a
model visibility that is inserted into the MODEL_DATA column.  This is
needed to use resolved source in gaincal and in fluxscale.  (Setjy will
automatically make this ft step.)

The sources currently available are 3C48, 3C138, 3C147, 3C286
at 1.4, 5.0, 8.4, 15, 22, 43 GHz.  Their location is site
dependent.  In Charlottesville and at the AOC, the models are
in /usr/lib/casapy/data/nrao/VLA/CalModels.

Keyword arguments:
vis -- Name of input visibility file
        default: none; example: vis='ngc5921.ms'
field -- Field name list
        default: '' ==> all
        NOTE: each source must be specified in a multi-source vis.
        field = '1328+307'  specifies source '1328+307'
        field = '4' specified field with index 4
spw -- Spw selection
        default: spw = '' (all spw)
model -- Name of input model image
        default: None;
        example: model='/usr/lib/casapy/data/nrao/VLA/CalModels/3C286_X.im'
        Note: The model visibilities are scaled from the model frequency
              to the observed frequency of the data.
nterms -- Number of terms used to model the sky frequency dependence
          default: 1
          example : nterms=3  represents a 2nd order Taylor-polynomial in frequency
                    and is to be used along with 3 model-image names. 
                    model=['xxx.image.tt0','xxx.image.tt1', 'xxx.image.tt2']
   reffreq -- Reference-frequency about which this Taylor-expansion is defined.
complist -- Name of component list
        default: None; ; example: complist='test.cl'
        components tool not yet available
incremental -- Add model visibility to the existing MODEL_DATA visibilties
        default: False; example: incremental=True

Definition at line 4 of file task_ft.py.

References taskinit.qatool.