Re: Hirzon angles??
The early GPS plan back in the '70's was for only 3 birds, as I recall. They quickly found out about coverage being restricted by all sorts of things on the ground like cities and terrain. I suspect that the people proposing this might have access to the early plans and other paperwork. Having worked some on this back then, I don't remember what the timeline was for de-classification.
Biting the hand that feeds IT
