Basic line of sight mechanics dictate their tracking, so break their view by ducking into buildings or underground spots. Getting into any structure cuts their ability to track you, and after a bit theyll lose interest and stop searching. Making good use of terrain is key here since they cant process targets through solid walls or deep caves, which gives you plenty of options to shake them off. My tip: the space anomaly is completely safe and they wont follow you in there at all

The best part is once youre inside somewhere and hidden, just wait it out until that alert level drops back down. Going really deep underground with the terrain manipulator works great, but make sure the tunnel entrance isnt too obvious or wide, or theyll sometimes manage to follow you in. Staying out of view long enough is what matters most, and structures are usually your safest bet