mShrinkCube - Reduce the size of a FITS cube

       in.fits
              Input FITS cube

       out.fits
              Path to output FITS cube.

       factor Size of blocks, in (fractional) pixels, to average. File size will be reduced by 1/factor squared.
              If the -f (fixed-size) flag is used, factor is the desired width of the output image.

       The drizzle algorithm has been implemented but has not been tested in this release.

       If a header template contains carriage returns (i.e., created/modified on a Windows machine), the cfitsio
       library  will  be  unable  to read it properly, resulting in the error: [struct stat="ERROR", status=207,
       msg="illegal character in keyword"]

       It is best for the background correction  algorithms  if  the  area  described  in  the  header  template
       completely encloses all of the input images in their entirety. If parts of input images are "chopped off"
       by  the  header  template,  the  background correction will be affected. We recommend you use an expanded
       header for the reprojection and background modeling steps, returning to  the  originally  desired  header
       size  for  the  final  coaddition.  The  default background matching assumes that there are no non-linear
       background variations in the individual images (and therefore in the overlap differences).  If  there  is
       any  uncertainty  in  this  regard, it is safer to turn on the "level only" background matching (the "-l"
       flag in mBgModel.

       2001-2015 California Institute of Technology, Pasadena, California

       If your research uses Montage, please include the following acknowledgement: "This research made  use  of
       Montage.  It  is  funded  by  the  National  Science  Foundation  under Grant Number ACI-1440620, and was
       previously funded by the National Aeronautics and Space Administration's Earth Science Technology Office,
       Computation Technologies Project, under Cooperative  Agreement  Number  NCC5-626  between  NASA  and  the
       California Institute of Technology."

       The  Montage  distribution includes an adaptation of the MOPEX algorithm developed at the Spitzer Science
       Center.

Montage 5                                           Dec 2016                                      MSHRINKCUBE(1)

       A utility for reducing the size of a FITS cube, by averaging blocks of pixels by any factor spatially and
       by integer factors in the third dimension.

       $ mShrinkCube final/out.fits final/out-lowres_5.fits 5
              [struct stat="OK"]

       OK     [struct stat="OK"]

       ERROR  Cannot open status file: statusfile

       ERROR  Image size factor cannot be interpreted as an real number

       ERROR  Shrink factor factor cannot be interpreted as an real number

       ERROR  [struct stat="ERROR", msg=

       ERROR  HDU value (n) must be a non-negative integer

       ERROR  Third axis compression factor (n) must be a positive integer

       ERROR  Image file in.fits missing of invalid FITS.

       ERROR  FITSlibraryerror

       mShrinkCube - Reduce the size of a FITS cube

       -f     Fixed-size  flag  -  specify  output  size of image, instead of the size of blocks of pixels to be
              averaged

       -d level
              Turns on debugging to the specified level (1-4).

       -h hdu Use the specified FITS extension (default is to use the first HDU with image data)

       -m factor
              The (positive integer) factor by which to compress the cube  in  the  third  (usually  wavelength-
              related) dimension.

       -s statusfile
              Output and errors are sent to statusfile instead of to stdout

       [Normal mode]: FITS output image, reduced in size by a factor of (1/factor)^2  .

       [Fixed-size mode]: FITS output image of width factor

       mShrinkCube [-f] [-d level] [-h hdu] [-m factor] [-s statusfile] in.fits out.fits factor