FITSexplore

Simple command line script to explore FITS files content.

Usage

FITSexplore [-d] [-k KEYWORD] [-f KEYWORD VALUE] [-r] [--version] [-h] [TARGET...]

Without optional argument

it will display the name and the type of all HDU contained in the files TARGET. The TARGET can contain any files with extension : .fits, .fits.gz, fits.Z, .oifits

me@host:~$ FITSexplore GRAVI.fits.Z
FITS(filename) = File: GRAVI.fits.Z
Mode: "r" (read-only)
HDUs: Num  Name                  Type
      1                          Image
      2    ARRAY_DESCRIPTION     Table
      3    ARRAY_GEOMETRY        Table
      4    OPTICAL_TRAIN         Table
      5    IMAGING_DATA_ACQ      Image
      6    IMAGING_DATA_SC       Image
      7    IMAGING_DETECTOR_SC   Table
      8    OPDC                  Table
      9    FDDL                  Table

-r,--recursive

Recursively explores entire directories given by TARGET. If no TARGET is given it will explore the working directory.

-d, --header

Display the FITS header of the TARGET

me@host:~$ FITSexplore -d file.fits
read(FitsHeader, filename) = SIMPLE  =                    T / file does conform to FITS standard
BITPIX  =                  -32 / number of bits per data pixel
NAXIS   =                    2 / Dimensionality
NAXIS1  =                  242 / width of row in bytes
NAXIS2  =                  242 / number of rows in table
EXTEND  =                    T / File contains extensions
CRPIX1  =                122.0 / Reference pixel
CRPIX2  =                122.0 / Reference pixel
CRVAL1  =                  0.0 / Coordinate at reference pixel
CRVAL2  =                  0.0 / Coordinate at reference pixel
CDELT1  = 6.944444444444445e-8 / Coord. incr. per pixel
CDELT2  = 6.944444444444445e-8 / Coord. incr. per pixel
CUNIT1  = 'deg     '           / Physical units for CDELT1 and CRVAL1
CUNIT2  = 'deg     '           / Physical units for CDELT2 and CRVAL2
HDUNAME = 'IMAGE-OI FINAL IMAGE' / Unique name for the image within the FITS file

-s, --stats

Display some statistical properties of the first hdu of the TARGET

me@host:~$ FITSexplore -s file.fits
size 	 	 type 		minimum	maximum	mean	std	median	mad
(1156, 1024, 20)	UInt16	966.0	31844.0	11440.0019	10963.8464	1984.0	1472.224

-k, --keyword KEYWORD

Print the value of the FITS header KEYWORD. This argument can be set multiple times to display several FITS keywords.

me@host:~$ FITSexplore -k "ESO DPR TYPE" -k "ESO DET2 SEQ1 DIT" -k  "ESO DET2 NDIT" -r /path/to/folder
/path/to/folder/file1.fits.Z             STD,SINGLE      3.0     120
/path/to/folder/file2.fits.Z             STD,SINGLE      3.0     120
/path/to/folder/file3.fits.Z             SKY,SINGLE      3.0     120
/path/to/folder/file4.fits.Z             SKY,SINGLE      30.0    12
/path/to/folder/file5.fits.Z             STD,SINGLE      30.0    8
/path/to/folder/file6.fits.Z             DARK    0.3     100
/path/to/folder/file7.fits.Z             DARK    3.0     100
/path/to/folder/file8.fits.Z             DARK    30.0    30

-f, --filter KEYWORD VALUE

Print all files where the FITS header KEYWORD = VALUE.

me@host:~$ FITSexplore -f "ESO DPR TYPE"  "DARK" -r /path/to/folder
/path/to/folder/file6.fits.Z
/path/to/folder/file7.fits.Z
/path/to/folder/file8.fits.Z

-s, --stats

Display statistical information about all image HDU:

FITSexplore -s file.fits
file.fits  hdu :SCI
size     type            mean   std     median  mad
(640, 640)      Float32         16170.782       10711.193       17808.355       10895.537
-35147.19           █      ▁▁▁▁▂▁▁▂▂▂▂▂▁▁▁▁               52474.26
 

-p, --plot

Display statistical information and plot all image HDU:

Other examples

• Adding a keyword value in the filename:

me@host:~$ FITSexplore -k "ESO DPR TYPE" | awk  '{system("mv "$1" "$2"_"$1)}'

• Displaying the size of files of a given type:

me@host:~$ ls -lh $(FITSexplore -f "ESO DPR TYPE" "DARK" -r /path/to/folder)

Installation

• Install the unregistered Julia package FITSexplore.jl.

pkg> add https://github.com/FerreolS/FITSexplore.jl

• Copy the script FITSexplore located in the bin folder to your favorite bin folder included in your PATH (e.g $HOME/bin, /usr/local/bin, ~/Applications). This script can be found in the folder .julia/packages/FITSexplore.
• Make the script executable.

chmod +x FITSexplore