I didn't really need another reason to keep my AP firmly disabled, but thanks I guess.

How many routers are required for this? I see it mentions that they should overlap, and there's a diagram that seems to imply 3 routers, but I'm not seeing it saying what the minimum is or if more makes a difference.

wow, I am definitely checking this out.

First time I have heard about such concepts was 2015 for my phd studies. Radar imaging, through the wall imaging, it introduced me to the large math framework of inverse and ill-posed problems.