NAME

       fiheader - reading and manipulating FITS header keywords

SYNOPSIS

       fiheader [opions] [input] [-o|--output <output>]

DESCRIPTION

       This program allows the user to read, set, alter or remove a set of values associated with
       the specified keywords from the primary header unit (a.k.a. simply  "header")  of  a  FITS
       image file.

OPTIONS

   General options:
       -h, --help
              Gives general summary about the command line options.

       --long-help, --help-long
              Gives a detailed list of command line options.

       --wiki-help, --help-wiki, --mediawiki-help, --help-mediawiki
              Gives a detailed list of command line options in Mediawiki format.

       --version, --version-short, --short-version
              Gives some version information about the program.

       -i, --input <image file>
              Name of the input FITS image file.

       -o, --output <image file>
              Name of the output FITS image file (can be the same as the input image file).

   Read keyword values:
       -g, --get, --read <keyword>,...
              List of keywords to get from FITS header.

       -F, --format <format>
              Format  of the output, space separated list of the arguments "filename", "keyword",
              "value", "comment" or "list", in the desired order. The "list" here is  a  list  of
              tab-separated values of matched keywords.

       -x, --extension <extension>
              Read keyword values from the given extension.

       Note that shell wildcard character patterns can be used in the keyword specifications.

   Altering FITS headers:
       -s, --set, --update <keyword>=<value>[/<comment>],...
              List of keywords with their new values (and optional comments) to be altered.

       -a, --append <keyword>=<value>[/<comment>],...
              List  of  keywords  with their new values (and optional comments) to be appended to
              the existing list of keywords.

       -d, --delete <keyword>,...
              List of keywords to be removed from the header.

       --force-alter-reserved-keywords
              Enable to alter reserved FITS keywords (use with caution).

       -w, --rewrite
              Re-write the input file(s) directly. Use this option exclusively from -o|--output.

REPORTING BUGS

       Report bugs to <apal@szofi.net>, see also https://fitsh.net/.

COPYRIGHT

       Copyright © 1996, 2002, 2004-2008, 2010-2016, 2018-2020; Pal, Andras <apal@szofi.net>