AIPS HELP file for PHAT in 31DEC22
As of Sun Feb 5 20:22:16 2023
Type: Adverb (Real scalar)
Use: Specifies the amplitude of the delta function to be added to the
center of the beam before picking CLEAN components (the Prussian
Hat). This was once believed to aid convergence but is now
Null Value: NONE ( 0 => nothing added)
APCLN.......Deconvolves images with CLEAN algorithm.
APVC........Deconvolves images with van Cittert algorithm.
IMAGR.......Wide-field and/or wide-frequency Cleaning / imaging
SDCLN.......Deconvolves image by Clark and then "SDI" cleaning
LINIMAGE....Build image cube from multi-IF data set.