Probably 15 years back, I read of a US artillery radar system which was designed to detect an inbound artillery shell, plot its trajectory, calculate the source coordinates and fire a retaliatory round (or more) before the incoming arrived.
Wanted to look up info on it , but a bit hazy on the system's name - IIRC it was RED-something. I figured the assembled wisdom/experience here would include someone who can join the dots for me.