I guess that once total stealth has been maxed in the "reflective" research-area, the next effective defensive would be some wide-ground arrays pointing to at l

I guess that once total stealth has been maxed in the "reflective" research-area, the next effective defensive would be some wide-ground arrays pointing to at least 1 satellite (making satellite techno a must) => as soon as at least 1 of the emitting array does not reach the satellite (of course something more complicated to avoid man-in-the-middle-attack, interference, etc...) it would mean that something flew through it... .