It is also possible to determine the coordinates of the corner by matching features to another image for which the sun center location is know. This would be necessary for images that do not include the solar limb. No standard piece of software was available when this guide was written so send a request for information to the e-mail address shown in the preface of this guide.
A crude routine called FLASH_COMP is available to take two images and
flash them using XINTERANIMATE. The images are scaled independently
and do not need to be put into an data cube. A sample call is
IDL> flash_comp, img1, img2