NAME

       mAddCube - Co-add the reprojected cubes to form the output mosaic

SYNOPSIS

       mAddCube  [-p  imgdir] [-n(o-areas)] [-a mean|median|count] [-e(xact-size)] [-d level] [-s
       statusfile] images.tbl template.hdr out.fits

DESCRIPTION

       Coadd the reprojected cubes in an input list to form an output  mosaic  with  FITS  header
       keywords  specified in a header file. Creates two output files, one containing the coadded
       pixel values for each cube plane, and the other containing coadded pixel area values.  The
       pixel  area  values  can  be  used  as  a weighting function if the output cube values are
       themselves to be coadded with other projected cubes, and may also be  used  in  validating
       the fidelity of the output pixel values.

OPTIONS

       -p imgdir
              Specifies path to directory containing reprojected images.  If the -p switch is not
              included, mAddCube will look for the input images in the current working directory.

       -n     Co-addition ignores weighting by pixel areas and performs coaddition based only  on
              pixel postions. Will not output an area image for the output image.

       -a type
              Select  type  of  averaging  to be done on accumulated pixel values (either mean or
              median).  To generate a map showing  counts  of  how  many  times  each  pixel  was
              overlapped by the input images, use count.

       -e     Enables  exact  size mode. The output image will match the header template exactly,
              instead of shrinking the output to fit the data.

       -d level
              Turns on debugging to the specified level (1-3).

       -s statusfile
              mAddCube output and errors will be written to statusfile instead of stdout.

ARGUMENTS

       images.tbl
              ASCII table (generated by  mImgtbl)  containing  metadata  for  all  images  to  be
              coadded.   For cubes, mImgtbl needs to be run with the -C option which picks up the
              third dimension parameters (and fourth if they exist).

       template.hdr
              FITS header template to be used in generation of output FITS cube.

       out.fits
              Name of output FITS image.

RESULT

       If successful, mAddCube creates a FITS datacube file out.fits that is a coadd of  all  the
       FITS  cubes  in  the  table  images.tbl,  according  to  the  header  template  given.   A
       corresponding out_area.fits is also created.

MESSAGES

       OK     [struct stat = "OK", time=time]

       ERROR  Invalid argument for -a flag

       ERROR  Cannot open status file: statusfile

       ERROR  Invalid image metadata file: filename

       ERROR  Need columns: cntr,fname, crpix1, crpix2, cdelt1, cdelt2, naxis1,  naxis2,  crval1,
              crval2, naxis3 in image list

       ERROR  Too many open files

       ERROR  Input wcsinit() failed.

       ERROR  Bad WCS in header template.

       ERROR  FITS library error

       ERROR  general error message

       ERROR  Allocation failed for file info (realloc)

       ERROR  Allocation failed for file info structs

       ERROR  Allocation failed for area file info structs

       ERROR  Allocation failed for input buffer

       ERROR  Allocation failed for input area buffer

       ERROR  Allocation failed for start/end info

       ERROR  Allocation failed for data line pointers

       ERROR  Allocation failed for data line

       ERROR  Allocation failed for area line pointers

       ERROR  Allocation failed for area line

       ERROR  Allocation failed for data counts

       ERROR  Allocation failed for output data line

       ERROR  Allocation failed for output area line

       ERROR  Allocation failed for data line (realloc)

       ERROR  Allocation failed for area line (realloc)

       ERROR  Allocation failed for median array

       ERROR  Allocation failed for median array (realloc)

       ERROR  Allocation failed for linked list structs

       ERROR  Allocation failed for linked list structs (additions)

EXAMPLES

       The  following  example  runs  mAddCube  on  4  FITS  images,  generating  the output file
       mosaic.fits.  Related files are images.tbl and template.hdr.

       $ mAddCube -p proj images.tbl template.hdr output/mosaic.fits
              [struct stat="OK", time=1]

BUGS

       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.

COPYRIGHT

       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.