does any one know what that reflective device is?
It’s a counter measure for infrared guided anti-aircraft missiles. Basically “heat seeking” missiles look for a very strong, solid infrared signature then follow it all the way to a “hit”. Like the heat from a jet engine. These things use infrared light to overwhelm the guidance system and effectively blind them or wobble to look like the target is moving more than it is, causing the missile to miss.