ASTSCRIPT-SORT-BY-NIGHT(1)

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

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

DESCRIPTION
This script is part of GNU Astronomy Utilities 0.24.

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:

    Input:

-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 argument!

    Output:

-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.

--stdintimeout
    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: http://www.gnu.org/software/gnuastro/

REPORTING BUGS
Report bugs to bug-gnuastro@gnu.org.

COPYRIGHT
Copyright © 2015-2025 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

SEE ALSO
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 command

    info astscript-sort-by-night

should give you access to the complete manual.