FITSLIST
                                                      S.Lee  1994/06/24  v1.0
                                                             1998/02/14  v1.3

FITSLIST is a simple program to display the contents of a FITS file header.
It does nothing more than print out all the lines in the header until it
encounters the keyword 'END'.

You can invoke FITSLIST with the name of the file on the command line,
otherwise it will prompt for the file name. The file extension defaults to
'.fts' but the environment variable FITS_EXT can be used to define a different
default. You may override this by entering an extension directly to the file.
e.g.

SET FITS_EXT=FIT

It checks the first line of the file for the keyword SIMPLE and its value
being true (T) before continuing, as a simple test that the file might be a
valid FITS file.

FITSLIST pauses after every 20 lines, awaiting a carriage return before
continuing. You may press 'q' at this point to terminate the program early.
Version 1.3 now allows the number of lines/screen to be set from the command
line. This can be useful if piping the output to a file - it won't then have
breaks in it. To use this, it must be entered on the command line after the
file name. Silly values force it back to 20 lines/screen. e.g.

C:\CCD>fitslist m42v-g 100 > fitshead.txt

Below is an example...
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C:\CCD>fitslist m42v-g

SIMPLE  =                    T / Conforms to FITS standard
BITPIX  =                   16 / Raw data:12 bits, unsigned
NAXIS   =                    2 / 2 Dimensional data
NAXIS1  =                  756 / Pixels, 0.017mm
NAXIS2  =                  484 / Pixels, 0.01975mm
INSTRUME= 'Cookbook 245 CCD  ' / Instrument
DATE-OBS= '01/01/1997        ' / day/month/year UT
TIME-OBS= '14:22:58          ' / Start time HH:MM:SS UT
EXPOSURE=                   20 / Exposure in seconds
EXPTIME =                   20 / Exposure in seconds
OBJECT  = 'M42 - V           ' / Name of object
COMMENT   M42 - V
OBSERVER= 'Steven Lee        ' / Name of observer
TELESCOP= '20cm f/4.5+barlow ' / Telescope
FILTER  = 'V                 ' / Filter in beam
ORIGIN  = '"Rainbow"         ' / Name of observatory
OBS-LAT =             -31.2786 / Latitude of observatory (S31d16'43")
OBS-LONG=             149.2124 / Longitude of observatory (E149d12m44.5s)
OBS-ALT =                  580 / Altitude of observatory (580m)
END
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