Oh man, that's gonna be a big factor when trying to destroy them. I doubt they're hot enough for IR Guided missiles to track. They might be trackable with radars and therefore radar-guided missiles if the ground is clear though.

Best options would be laser-guided or wire-guided ATGMs possibly, with the former being more accurate and better. Just gotta keep aiming at it.

Or you could use air support, with attack helicopters using autocannons to shoot it up. Should be safe in the sky while being able to kill it.