rotsum
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What it does:  Sums multiple frames, attempting to rotate them and scale them
               to follow a specified point as it travels around the earth.

Controls:      Rotsum uses the directory specified in the top of the rotsum.pro
               file, and scans in all of the fits files to create thumbnails,
               essentially.  When the main window pops up, these are located
               along the bottom of the screen.  The right mouse button in the
               main draw area will relocate the center of the earth, and the
               left button will specify the point to follow.  To pick the
               region you want to sum, use the left mouse button to specify the
               first image, and then click the last image you want to use with
               the right mouse button (in the thumbnail preview area).  The
               rotation speed lets you guess what speed the object is moving,
               with 15 degrees being a geostationary motion.  'Export
               composite' will export the final, summed frame, while 'export
               rotated frames' will export each frame separately.  Files
               exported in this manner appear as PNGs in the directory
               specified in the popup dialog.

Notes:         Rotsum is probably not as good of a solution as using xform to
               create projections and then performing operations on those
               images.


        
