Primary FITS Headers: mhead

To access the fits header, Stuart Marshall's mhead program is simple to use, and prints the entire header to the terminal. Combining mhead with grep returns a given keyword line.

$ mhead imagefile.fit

SIMPLE  =                      T / file does conform to FITS standard

...

$ mhead imagefile.fit | grep FOCUS

FOCUS   =                3.29648 / Focus position (mm)

$