[daip] BLANK - excluding single-channel peaks

[Linda Watson]

Dear AIPS Help Desk,

I'm using the AIPS task BLANK to blank an HI data cube. I'm using the 
method where you blank a convolved version of your cube to exclude flux < 
2-3*noise and then use that convolved cube as a filter to blank your 
original image (using OPCODE 'SELC' and then 'IN2C').  I would also like 
to exclude single-channel flux peaks.  Is there a way to only keep pixels 
with signal that is above a set level in a specified number of consecutive 
channels?

It seems like using one of the other OPCODE settings should be the way to 
go, but my attempts have not been successful.  I've mostly been trying to 
work with OPCODE 'FLTW' but it has become very clear that I don't 
understand what AIPS actually blanks when I give it a window size.

I would appreciate any help!

Many thanks,
Linda