An imaging system for a rotary aircraft having a millimeter wave imager with visible or infrared overlay. The system includes an active millimeter wave imaging system comprising a millimeter wave transmitter and a millimeter wave phased array receiver for producing millimeter wave images of a landing...http://www.google.com/patents/US7692571?utm_source=gb-gplus-sharePatent US7692571 - Millimeter wave imager with visible or infrared overlay for brownout assist
