SSZAP is a procedure and hence all parameters must always be specified on the command line. The syntax to invoke it is,
> SSZAP <dataset> <ssds> <radius> <qmode>SSZAP applies the quality operation specified by
<qmode> to all
pixels in <dataset> within a radius <radius> of the points
in space defined by the positions of the sources in <ssds>. The
value of <radius> should be specified in the spatial axis units
of <dataset>. <qmode> should be any one of the quality
operations supported by the CQUALITY application.
The first point to note is that <dataset> need not be the dataset
which produced <ssds> -- in fact it can be any n-dimensional
binned dataset as long as the pointing direction is the same as that
which produced <ssds>. Consider the following example,
> XSORT ... OUT=cube ; Create data cube from instrument
; interface
> PROJECT cube image 3 ; Collapse cube to image
> PSS image 0.5 sources \ ; Source search the image using
; a noddy background value
> SSZAP cube 0.02 sources IGNORE ; Ignore data in cube within 0.02
; degrees of a source
> INTERP cube intcube ... ; Patch over data where sources were
> PROJECT intcube better_bgnd 3 ; Create new bgnd model
> SSZAP cube 0.02 sources RESTORE ; Reset quality in cube
> PSS image better_bgnd ... ; Improved source search