Signal Detection Theory

Signal detection theory was invented or arose out of early use of radar in world war two. The question for signal detection is well Are you detecting enemy aircraft or are you detecting a flock of birds or something else? Okay, so do we Generalize from this situation to the rest of physical reality and the rest of decision theory? That's a fair question as pink or ass Is there satellite technology that makes the radar signal just one among many other different ways of imaging? What's going on on the ground? Is there a reason we have for thinking the intercontinental ballistic missile is heading towards us? Or if we just detected something on the radar is the computer system able to interpret whatever the signals