Given a SXT PFI image and either the file name of a ground-based image,
or the ground-based image itself, GET_GBO_PFI will extract the portion of
the GBO image corresponding to the SXT PFI. The routine (a modification
of the routine GBO_PFI written by Alan McAllister)
determines the PFI corners from index, rotates these to the
time of the GBO image, and extracts the section of the GBO image.
You can either pass in the GBO image itself, in which
case you MUST also supply the time for it, or a string
with the path/filename using the Yohkoh file name convention.
Some sample calls are:
IDL> gbo_img = get_gbo_pfi(index, gbo_fullimg, gbo_time)
IDL> gbo_img = get_gbo_pfi(index, '/yd5/gbo91_46a/gkm911116.1958')