Part of Iron Dome is trajectory analysis. If the profile of a target matches that of an unguided rocket and the CEP is in some unoccupied area, no interceptors

Part of Iron Dome is trajectory analysis. If the profile of a target matches that of an unguided rocket and the CEP is in some unoccupied area, no interceptors are fired. If it looks like it'll land in a populated area, interceptors are fired. It doesn't just shoot everything in the sky.