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Hi. I'm trying to make an Orbiter scenario for ISEE-3/ICE which will be making a pass by Earth in August of this year. I dug up some TLEs from here and did the conversion. The orbit looks about right. Aphelion and Perihelion are correct and there is an intersection with Earth in August, but...

My question is about the Head Up Displays we are all too familiar with. I'd like to know how the optics work in real life HUDs. I understand that the image you see is a reflection from an LCD or CRT. The cool part about real HUDs, though, thats not obvious from 2D pictures is that the image...