The real deal use radar/lidar sensors, so you can replace the whole sensor suite with 4 90-degree sensors facing upwards with the added benefit of being able to track not just range but speed and trajectory.
Slap the computer on the back of the helmet, and it'll even work as a counterweight for the night vision goggles!
As my dad's friend would say, "Wash with colors only? Clothes are one color: laundry-colored!"