Infrared

Bremsstrahlung radiation fast electrons zipping past boron nucleus produce X-rays black channels thermal camera outside thermal spectrum MH370

Systematic survey searching for millions of meter-sized interstellar objects in Earth orbit utilizing infrared optical radio acoustic magnetic instruments at Harvard Pennsylvania Nevada observatories to identify technological signatures versus natural phenomena and distinguish artificial from natural debris

Advanced propulsion systems might generate detectable plasma signatures surrounding unusual engines producing thermal infrared emissions but plasma represents secondary effect rather than fundamental propulsion mechanism requiring investigation underlying engine technology

Proposes that alien signals can be detected by analyzing entropy distribution patterns rather than looking for specific radio frequencies