The IDL program, fvp.pro, uses the cursor to measure the position 
of a fits image (e.g. SMM C/P)
in heliographic and array coordinates.
You will need to copy over all the .pro files in this directory
to run fvp.pro

Examples of usage:

IDL> fvp,'file.fts'

You can also save your measurements in a gif image:

IDL> fvp,'file.fts',/gif

You can pre-load a color table and set min/max values::

fvp,'file.fts', /gif, cm='colormap.lut', wmin=1, wmax=240