Index: unk/ppStack/README.txt
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-ppStack needs to be optimised, principally to reduce the memory
-footprint (10 or so images will get it to over 4 GB).  The proposed
-strategy follows, more or less, the same as for ppMerge.
-
-* Convolution steps:
-  - For each file:
-    + read entire image
-    + convolve to reference PSF
-    + write convolved image
-
-* Combination step:
-  - For each chunk:
-    + For each file, read chunk
-    + combine chunk
-  - Probably have to repeat, to do the multi-pass rejection
-
-
-To do:
-* Need file PPSTACK.OUTPUT.CONV (image, mask, weight versions)
-* Need file PPSTACK.INPUT.CONV (image, mask, weight versions)
-* Check: does pmFPAfileChecks do piece-by-piece read?
-* Can we reset a file, so that we can read it twice through?
-* pmStack functions probably need work so that they operate on a piece
-  of the image at a time.  Will there be issues with the masks in the
-  second pass?