PREDICT operation

The PREDICT operation runs DP3 to preform the prediction of the visibility data.

Note

The PREDICT step should be done after all corruption operations but before a NOISE operation. PREDICT will overwrite any existing data in the output column.

Parameters

The following parameters are available for this operation:

outputColumn

This parameter is a string (default is 'DATA') that sets the column name to which the predicted visibilities are written.

predictType

This parameter is a string (default is 'h5parmpredict') that sets the type of prediction done. Use 'h5parmpredict' for normal prediction and one of 'predict', 'idgpredict', or 'wgridderpredict' to predict without direction-dependent corruptions. If the prediction is done from a FITS image, one of 'idgpredict' or 'wgridderpredict' must be used.

Note

Currently, the 'idgpredict' or 'wgridderpredict' types do not support the application of direction-dependent corruptions. Therefore, when predicting from a FITS image, only direction-independent corruptions can be applied.

resetWeights

This parameter is a boolean (default is True) that sets whether to reset the entries in the WEIGHT_SPECTRUM column.