ccalapply (Calibration Applicator)

This page provides instruction for using the ccalapply program. The purpose of this software is to apply calibration parameters to Measurement Sets.

Running the program

It can be run with the following command, where “config.in” is a file containing the configuration parameters described in the next section.

$ ccalapply -c config.in

The ccalapply program is not parallel/distributed, it runs in a single process operating on a single input measurement set.

Configuration Parameters

The following table contains the configuration parameters to be specified in the “config.in” file shown on above command line. Note that each parameter must be prefixed with “Ccalapply.”. For example, the “dataset” parameter becomes “Ccalapply.dataset”.

In addition to the below parameters, those described in Access to calibrator solutions are applicable. Specifically:

• Ccalapply.calibaccess
• Ccalapply.calibaccess.parset (if calibaccess is “parset”); or
• Ccalapply.calibaccess.table (if calibaccess is “table”)

Parameter	Type	Default	Description
dataset	string	None	The name of the measurement set to which the calibration parameters will be applied.
calibrate.scalenoise	bool	false	If true, the noise estimate will be scaled in accordance with the applied calibrator factor to achieve proper weighting.
calibrate.allowflag	bool	false	If true, corresponding visibilities are flagged if the inversion of Mueller matrix fails. Otherwise, an exception is thrown should the matrix inversion fail
calibrate.ignorebeam	bool	false	If true, the calibration solution corresponding to beam 0 will be applied to all beams
freqframe	string	topo	Frequency frame to work in (the frame is converted when the dataset is read). Either lsrk or topo is supported.

Example

Ccalapply.dataset                   = mydataset.ms

Ccalapply.calibaccess               = table
Ccalapply.calibaccess.table         = calparameters.tab