dfits - display FITS file header information
dfits [-x xtnum] <list>
dfits [-x xtnum] -
dfits displays FITS header informations on stdout. Header information
can be found in the main header only (default), in extensions, or in
both. See the -x option below. dfits accepts multi-file input.
’dfits -’ expects single file data coming from stdin. dfits also
accepts now ’HDR’ files. These are identified from the fact that they
contain a line feed in one of the 80 first characters.
Specifies the extension to print out. Extensions are numbered
starting from 1. If this option is not specified, only the main
header is printed out. If this option specifies an extension
that does not exist, nothing is printed out.
Specify 0 as extension number to get a print of the main header
plus all extension headers.
dfits *.fits | grep NAXIS3
gzip -d < star.fits.gz | dfits - | more
dfits -x 0 *.fits
dfits -x 3 *.fits
fitsort can be combined with dfits output to sort out keyword values of
a group of FITS files.
Files shall all comply with FITS format
30 Mar 2000 dfits(1)