BANDPASS operation

The BANDPASS operation adds a typical bandpass to the simulated visibilities. The bandpass tables used are taken from van Haarlem et al. (2013) [1] and located in the data/ directory of the LoSiTo source tree. There are two methods to apply the bandpass: the bandpass amplitudes can either be stored to a h5parm - file or be applied directly to a data column within a measurement set.

Note

Depending on which method is used to add the bandpass to the simulation, the position of this step in the parset differs. For the 'h5parm' - method, this step must be before the PREDICT step. For the 'ms' - method, the bandpass operation must be placed after the PREDICT - step, otherwise it will be overwritten.

Parameters

The following parameters are available for this operation:

method

This parameter is a string (no default) that sets the method to use to apply the bandpass corruptions:

  • 'h5parm' - this parameter is a string (default is corruptions.h5) store the corruptions in the h5parm given by h5parmFilename.

  • 'ms' - apply the corruptions directly to the MS file.

h5parmFilename

This parameter is a string (no default) that sets the filename of the input/output h5parm file.

outputColumn

This parameter is a string (default is 'DATA') that sets the column name to which the bandpass is applied (method = 'ms' only).