Provided by: gnuastro_0.18-1_amd64 bug


       astscript-sort-by-night - Sort input FITS files by night


       astscript-sort-by-night [OPTION] FITS-files


       This script is part of GNU Astronomy Utilities 0.18.

       This  script  will  look into a HDU/extension for a header keyword in the given FITS files
       and interpret the value as  a  date.  The  inputs  will  be  separated  by  "night"s.  The
       definition a "nights" is set with the '--hour' option (just note that the FITS time may be
       recorded in UTC, not local time)! It will then print a list of all the input  files  along
       with  the  following  two  columns:  night number and file number in that night (sorted by
       time). With '--link' a symbolic link  (one  for  each  input)  will  be  made  with  names
       including the night classifier. With '--copy' instead of a link, a copy of the inputs will
       be made.

       For more information, please run any of the following commands. In  particular  the  first
       contains  a very comprehensive explanation of this script's invocation: expected input(s),
       output(s), and a full description of all the options.

       Inputs/Outputs and options:
              $ info astscript-sort-by-night

       Full Gnuastro manual/book:
              $ info gnuastro

       If you couldn't find your answer in the manual, you can get direct help  from  experienced
       Gnuastro users and developers. For more information, please run:

              $ info help-gnuastro

   astscript-sort-by-night options:

       -h, --hdu=STR
              HDU/extension of all input FITS files.

       -k, --key=STR
              Header keyword specifying date to use.

       -H, --hour=FLT
              Hour  in  next  day  to  be  included  in  night.  Be aware of time zones with this


       -l, --link
              list of inputs with night and file number.

       -c, --copy
              Copy the files, don't make symbolic links.

       -p, --prefix=STR
              Prefix for outputs of '--copy' and '--link'.

              Operating mode:

       -?, --help
              Print this help list.

       --cite BibTeX citation for this program.

       -q, --quiet
              Don't print any extra information in stdout.

       -V, --version
              Print program version.

              Micro-seconds to wait for standard input (used for operations within this script).

       Mandatory or optional arguments to long options are also mandatory  or  optional  for  any
       corresponding short options.

       GNU Astronomy Utilities home page:


       Report bugs to


       Copyright  ©  2015-2022 Free Software Foundation, Inc.  License GPLv3+: GNU General public
       license version 3 or later.
       This is free software: you are free to change and redistribute it.  There is NO  WARRANTY,
       to the extent permitted by law.

       Written/developed by Mohammad Akhlaghi


       The  full documentation for astscript-sort-by-night is maintained as a Texinfo manual.  If
       the info and astscript-sort-by-night programs are properly installed  at  your  site,  the

              info astscript-sort-by-night

       should give you access to the complete manual.