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 positions. 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.