Excluding single-channel flux peaks

Reader Linda asks

I'm trying to use the AIPS task BLANK to blank an HI data cube. I am 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. With the help of other kind folks, I've got this part worked out. But I would also like to exclude single-channel flux peaks. Does anyone know of a way to ask AIPS to only keep pixels with signal that is above a set level in a specified number of consecutive channels? It seems like using OPCODE = 'FLTW' might be helpful, but my attempts at using this haven't produced anything useful.

I'd really appreciate any help!

Any suggestions?

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