Keep in mind, 99.99998% of the time we work in the dark. When they start an orbit blacked out, hard to really pinpoint where they are. If the apache's FLIR/TADS are anything like the drones`, the range finder is in the lower right and pops in and out (1200-1400m ranges) -- so -- depending on their orbit radius and alt, could be anywhere from 1500-3000ft. Despite being tough as a SOB, sadly, that still puts them in range of anti-air.
***disclaimer, I've held an EWO role, not avaiation.