A new search string slipped past my chemobrain this morning: "animated gif tcl/tk". It worked. I found anigif.tcl by Ryan Casey at https://cardtable.sourceforge.net/tcltk/

It looks like a simple package I can just slip right into JStrack (with credit, obviously). And it will work---I just finished testing it. All I need to do is get the actual size of the image from GOES EAST and set the height/width of the label widget it uses to the satellite image's dimensions.

So thanks anyways, but this seems to have solved itself once chemobrain let one get away. :-)

Seems every site is different...do I need to mark this solved or does it just time out?

Thanks,
--jim

--
From my days in 16th Special Operations Wing Intelligence:

AN EXERCISE is a situation in which you stop what you're doing
in order to simulate doing what you were doing so you can show
someone else that you can simulate what you were doing as well
as you were doing it before you were interrupted.