mHdrCheck(1)
NAME
mHdrCheck - Check the validity of a FITS image's header
SYNOPSIS
mHdrCheck [-s statusfile] img.fits
DESCRIPTION
mHdrCheck reads in the header from a FITS image (or an ASCII header template file) and checks to see if any header lines are invalid. If it finds one, it will print out a message stating which keyword is invalid and exit before checking the rest of the header. It will not report on multiple invalid values. If all value are correct, mHdrCheck will print out a "Valid FITS/WCS" message.
OPTIONS
-s statusfile
Output and errors are sent to statusfile instead of to stdout
ARGUMENTS
img.fits
Path of FITS file to be validated.
MESSAGES
OK Valid WCS in FITS file. OK Valid FITS/WCS in header file. ERROR Cannot open status file statusfile ERROR File filename not found. ERROR File (filename) is not a FITS image ERROR FITS header lines cannot be greater than 80 characters ERROR No BITPIX keyword in FITS header ERROR No NAXIS keyword in FITS header ERROR No NAXIS1 keyword in FITS header ERROR No NAXIS2 keyword in FITS header ERROR No CTYPE1 keyword in FITS header ERROR No CTYPE2 keyword in FITS header ERROR No CRPIX1 keyword in FITS header ERROR No CRPIX2 keyword in FITS header ERROR No CRVAL1 keyword in FITS header ERROR No CRVAL2 keyword in FITS header ERROR No CDELT1 keyword (or incomplete CD matrix) in FITS header ERROR No CDELT2 keyword (or incomplete CD matrix) in FITS header ERROR BITPIX keyword in FITS header not an integer ERROR Invalid BITPIX in FITS header (must be 8,16,32,64,-32 or -64) ERROR NAXIS keyword in FITS header not an integer ERROR NAXIS keyword in FITS header must be >= 2 ERROR NAXIS1 keyword in FITS header not an integer ERROR NAXIS1 keyword in FITS header must be > 0 ERROR NAXIS2 keyword in FITS header not an integer ERROR NAXIS2 keyword in FITS header must be > 0 ERROR CRPIX1 keyword in FITS header not a real number ERROR CRPIX2 keyword in FITS header not a real number ERROR CRVAL1 keyword in FITS header not a real number ERROR CRVAL2 keyword in FITS header not a real number ERROR CDELT1 keyword in FITS header not a real number ERROR CDELT2 keyword in FITS header not a real number ERROR CROTA2 keyword in FITS header not a real number ERROR CD1_1 keyword in FITS header not a real number ERROR CD1_2 keyword in FITS header not a real number ERROR CD2_1 keyword in FITS header not a real number ERROR CD2_2 keyword in FITS header not a real number ERROR EQUINOX keyword in FITS header not a real number ERROR No WCS information (or not FITS header) ERROR Must have at least two dimensions ERROR Invalid projection ERROR Invalid NAXIS1 ERROR Invalid NAXIS2 ERROR CTYPE1 and CTYPE2 don't match ERROR Invalid CTYPE1 ERROR Invalid CD matrix ERROR Invalid CDELT1 ERROR Invalid CDELT2 ERROR FITS library error
EXAMPLES
$ mHdrCheck input/badfits/bad-crota2.fits
[struct stat="ERROR", msg="CROTA2 keyword in FITS header not a
real number"]
$ mHdrCheck input/2mass.fits
[struct stat="OK", msg="Valid FITS/WCS."]
$ mHdrCheck input/badfits/bad-ctype.fits
[struct stat="ERROR", msg="Invalid projection"]
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.
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