This standalone program can create a mosaic of 2 or 3 fits file of partial sun generated by INTI as it uses fits keywords to center the disks by simple translation
@author: valerie Desnoux
Modified from https://github.com/grmarcil/image_spline/blob/master/spline.py - Thanks ! and paper from Burt and Adelson's "A Multiresolution Spline With Application to Image Mosaics"
refer to the site http://valerie.desnoux.free.fr/inti/mosaic.html for user manual