dfits(1) General Commands Manual dfits(1)NAME
dfits - display FITS file header information
SYNOPSIS
dfits [-x xtnum] <list>
dfits [-x xtnum] -
DESCRIPTION
dfits displays FITS header informations on stdout. Header information can be found in the main header only (default), in extensions, or in
both. See the -x option below. dfits accepts multi-file input. 'dfits -' expects single file data coming from stdin. dfits also accepts
now 'HDR' files. These are identified from the fact that they contain a line feed in one of the 80 first characters.
OPTIONS -x xtnum
Specifies the extension to print out. Extensions are numbered starting from 1. If this option is not specified, only the main header
is printed out. If this option specifies an extension that does not exist, nothing is printed out.
Specify 0 as extension number to get a print of the main header plus all extension headers.
Examples :
dfits *.fits
dfits *.fits | grep NAXIS3
gzip -d < star.fits.gz | dfits - | more
dfits -x 0 *.fits
dfits -x 3 *.fits
SEE ALSO
fitsort can be combined with dfits output to sort out keyword values of a group of FITS files.
FILES
Files shall all comply with FITS format
30 Mar 2000 dfits(1)
Check Out this Related Man Page
fitsort(1) General Commands Manual fitsort(1)NAME
fitsort - sort FITS header information from a list of files
SYNOPSIS
dfits <FITS files...> | fitsort <FITS keywords...>
DESCRIPTION
fitsort extract keyword values from a set of FITS headers and outputs it in an ASCII table format, which is compatible with most data pro-
cessing software packages. It shall only be used in combination with the dfits utility.
The ASCII output is shown in columns. Columns are aligned with blank characters and also separated by tabulations. Blank alignment allows
human readers to visualize the output in a pretty format, tabulations are there for spreadsheet compatibility. If you want to load out fit-
sort output into any spreadsheet, specify that fields shall be separated by tabulations and entries separated by linefeeds.
Examples :
dfits *.fits | fitsort BITPIX NAXIS NAXIS1 NAXIS2
The output would look like:
FILE BITPIX NAXIS NAXIS1 NAXIS2
file0001.fits 16 2 128 128
file0002.fits 32 2 512 512
...
ESO specific features in the FITS header are also supported. To get values for 'HIERARCH ESO' keywords, just give the complete names within
double quotes. e.g.
dfits *.fits | fitsort "HIERARCH ESO INS LENS"
Another way of giving HIERARCH ESO keywords is to use the short FITS notation, the above example can be given as:
dfits *.fits | fitsort INS.LENS
Example: to retrieve the DPR keywords from an ESO FITS header, you would use:
dfits *.fits | fitsort To be completed... DPR.CATG DPR.TYPE DPR.TECH
This second way of requesting HIERARCH ESO keywords is not only shorter to type, it also avoids typing quotes or double-quotes on the com-
mand-line, making it easier to script with fitsort.
Notice that the keywords you give on the command-line are case-insensitive. The above line is equivalent to:
dfits *.fits | fitsort dpr.catg dpr.type dpr.tech
OPTIONS -d Do not print out the first output line. This option is useful to get only the query results, without the top line (giving all column
names). This makes it easy to script fitsort from programs like awk or perl.
FILES
Input files to dfits shall all comply with FITS format. fitsort also supports HIERARCH ESO FITS format.
SEE ALSO
dfits (1)
25 Jun 2001 fitsort(1)
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