replacekey(1) General Commands Manual replacekey(1)NAME
replacekey - replace keywords in a FITS header
SYNOPSIS
replacekey [options] <in>
DESCRIPTION
replacekey is aimed at replacing keywords in a FITS file's header by new keywords provided by the user on the command-line.
ALGORITHM
The user can provide a new_keyword, an old_keyword, a value and a comment. first searchs for old_keyword if provided. If it finds it, it
replaces the associated card by the new one (new_keyword=value/comment). If old_keyword is either not found or not provided, associated
card by the new one (new_keyword=value/comment). new_keyword has to be provided.
Examples: You want to change the value of VALUE from 32 to 16 in myfile.fits: % replacekey -k "VALUE" -v "16" myfile.fits
If you want to replace the card with the keyword OLD by "NEW = 3.14 / This is a usefull key" in myfile.fits: % replacekey -k "NEW" -v
"3.14" -c "This is a usefull key" -K "OLD" myfile.fits
If your do not care about the HISTORY cards you have in the header, and want to replace the first one by VALUE=32, you would do:
% replacekey -k "VALUE" -v "32" -K "HISTORY" myfile.fits
OPTIONS -k or --key key
To provide the new keyword.
-K or --old key
To provide the old keyword.
-v or --val val
To provide the new value.
-c or --com com
To provide the new comment.
SEE ALSO
hierarch28 to convert HIERARCH ESO keywords to regular 8-char keywords.
FILES
Files shall all comply with FITS format
BUGS
Modifications are so far only possible in the main header, not in the extensions.
28 Oct 1999 replacekey(1)
Check Out this Related Man Page
dfits(1) General Commands Manual dfits(1)NAME
dfits - display FITS file header information
SYNOPSIS
dfits [-x xtnum] <list>
dfits [-x xtnum] -
DESCRIPTION
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.
OPTIONS -x xtnum
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.
Examples :
dfits *.fits
dfits *.fits | grep NAXIS3
gzip -d < star.fits.gz | dfits - | more
dfits -x 0 *.fits
dfits -x 3 *.fits
SEE ALSO
fitsort can be combined with dfits output to sort out keyword values of a group of FITS files.
FILES
Files shall all comply with FITS format
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