Munipack An astronomical image processing software

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Backup Strategy

Backup strategy for Munipack modifies both traditional Unix system as well as FITS conventions. There are general rules:

• Observed original data are valuable and untouchable.
• Adding or removing a new HDU extension to FITS files is a reversible action.
• Newly created output files can be overwritten without caution.

Practical implications:

• All actions which can potentially modify original image data (currently only phcorr) refuses actions on its. The rule can be ignored by --enable-overwrite switch for phcorr, while it is strongly discouraged!
• The recommended file handling is to copy and modify files, stored in a source directory (data/ for instance), to another (work/ for instance) directory by specifing -t option:

        $ mkdir work/
        $ munipack phcorr ... -t work/ data/*.fits
      

  By default, the label _proc is included in filenames when the output directory by -t switch is not specified. This is common for phcorr, astrometry, find, aphot, gphot.
• The outputs of phcal are expected to be included in the working directory so the label _cal is added to original filenames by default.
• All newly created files by bias, dark, flat, cone, kombine, colouring, votable, cross, artifical are overwritten without any warning, for convenience; only some processing time can be lost.

The backup strategy has been changed between versions 0.5.10 and 0.5.11 (January 2018).