We have very good and even extra better good cruise missiles, but their targeting is generally GPS and enhanced GPS type systems. They know exactly where to poke their nose and exactly what altitude to be at when they poke their nose in, including if they need to be in a bunker busting dive at that moment.
They are also very sneaky, they can fly very low to avoid most detection, and can take circuitous routes using terrain as cover. They have Image identification so they can (if necessary) identify their target and terrain on their route, by sight, and be re-targeted mid flight.
However their purpose is fixed or not easily moved targets, not mobile radar antenna arrays, and they are not yet exceptionally fast.
I thought we had some cruise missiles that loitered and then homed in on the radar emissions. Perhaps it was only a research project.