NAME
mAddExec - Create a mosaic from images already in the same projection
SYNOPSIS
mAddExec [-p imgdir] [-n(o-areas)] [-a mean|median] [-e(xact-size)] [-d level] [-s statusfile] [-x TilesSizeAxis0] [-y TileSizeAxis1] [-o OverlapAxis0] [-q OverlapAxis1] images.tbl template.hdr tiledir out.fits
DESCRIPTION
Builds a series of outputs (which together make up a tiled output) through multiple executions of the mAdd modules.
OPTIONS
- -p imgdir
-
Specifies path to directory containing reprojected images. If the -p switch is not included, mAdd 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).
- -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
-
mAdd 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.
- template.hdr
-
FITS header template to be used in generation of output FITS
- tiledir
-
Directory to contain output tile images and header templates
- out.fits
-
Prefix for output tile images
RESULT
If successful, mAddExec creates a set of FITS tiles covering the area described in template.hdr, as well as matching "tiled" header files for each output tile.
MESSAGES
- OK
-
[struct stat = "OK", time=time]
- ERROR
-
MPI initialization failed
- ERROR
-
Invalid argument for -x flag
- ERROR
-
Invalid argument for -y flag
- ERROR
-
Invalid argument for -o flag
- ERROR
-
Invalid argument for -q flag
- ERROR
-
Invalid argument for -a flag
- ERROR
-
Cannot open status file: statusfile
- ERROR
-
command line option was not integer
- ERROR
-
option cannot be negative
- ERROR
-
Invalid image metadata file: filename
- ERROR
-
Need columns: cntr,fname, crpix1, crpix2, cdelt1, cdelt2, naxis1, naxis2, crval1, crval2 in image list
- ERROR
-
Memory allocation failed
- ERROR
-
Too many open files
- ERROR
-
Input wcsinit() failed.
- ERROR
-
Failed to allocate enough memory for output arrays
- ERROR
-
Bad WCS in header template.
- ERROR
-
Template file not found.
- ERROR
-
FITS library error
- ERROR
-
general error message
EXAMPLES
The following example runs mAddExec on this set of images, generating a set of tiles conforming to the size and overlap specified on the command line:
- $ mAddExec -p proj -x 1000 -y 1000 images.tbl template.hdr tiles tile.fits
-
[struct stat="OK", mTileHdr_count=4, mTileHdr_failed=0, mTileHdr_warning=0, mAdd_count=4, mAdd_failed=0, mAdd_warning=0, time=8]
- $ ls tiles
-
tile_0_0.hdr
tile_0_0.fits
tile_0_0_area.fits
tile_0_1.hdr
tile_0_1.fits
tile_0_1_area.fits
tile_1_0.hdr
tile_1_0.fits
tile_1_0_area.fits
tile_1_1.hdr
tile_1_1.fits
tile_1_1_area.fits
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.