Yeah. The way this sort of thing is usually done is with nutation. You wiggle the antenna a tiny amount and look for failure. Then you correct in the opposite direction of where failure (loss of accurate pointing) occurred. You have to do this because of target motion.
In this case you also face the reality that the target has low radar cross section, so you don’t have high confidence of where you want to point to begin with.
I’m sure the Raytheon tests have some very wide target that eliminates any issues of radar cross section and it will move in a simple path, and they may even cheat for their progress funding test by predicting that motion and easing the antenna to a predicted position, minimizing any nutation challenges (and certainly a low wind day so the antenna stays put).
That’s how I would construct testing for funding. Anyway, it’s probably not going to work on the battlefield.
May not work as planned, but it sure as heck will cause a LOT of jumping around by the enemy!