NRAO Home > CASA > CASA Toolkit Reference Manual

[next] [prev] [prev-tail] [tail] [up]

simulator.predict - Function

2.4.1 Predict astronomical data from an image or components


Description

Predict astronomical data from an image. The (u,v) coordinates already exist, either from a MeasurementSet we have read in or by generating the MeasurementSet coordinates and empty data through smobserve. This method calculates visibilities for those coordinates.

- predict(incremental=False) calculates new visibilities and replaces the DATA column, - predict(incremental=True) calculates new visibilities, adds them to the DATA column - predict for any value of incremental then sets CORRECTED_DATA equal to DATA, and MODEL_DATA to 1 * predict assumes model image units are Jy/pixel, and in fact will overwrite the brightness units of the image itself!

* treatment of primary beam depends critically on parameters set in sm.setvp() and sm.setoptions(ftmachine) - see help sm.setvp for details

Arguments

Inputs

imagename

Name of image from which to predict visibilities

allowed:

stringArray

Default:

complist

Name of component list

allowed:

string

Default:

String

incremental

Add this model to the existing Data Visibilities?

allowed:

bool

Default:

false

Returns
bool
__________________________________________________________________

[next] [prev] [prev-tail] [front] [up]


More information about CASA may be found at the CASA web page

Copyright © 2016 Associated Universities Inc., Washington, D.C.

This code is available under the terms of the GNU General Public Lincense

Home | Contact Us | Directories | Site Map | Help | Privacy Policy | Search