I tried to implement the changes I made in the stripped down GUI code. It worked mostly, except updating the slider caused some problems, so I commented that out. I kept the parts that updated the text and then calculated a fix using the Interactive Computer Ephemeris, and input the data by editing the text. I’m posting this shot because it shows good geometry. If I get the GUI straight, I want to use all the points to calculate an actual intersection. Its good that I can zoom in but the points get lost, the closer you zoom.
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