infrared intelligence (IRINT)

Secret Intelligence Service (SIS) / Military Intelligence, Section 6 (MI6)

tactical intelligence / combat intelligence

undeclared member of the intelligence or counter-intelligence agencies

Defence intelligence of Ukraine (DIU) / Main Directorate of Intelligence of the MoD of Ukraine

active infrared (IR) guidance system

electro-optic/infrared (EO/IR)

forward looking infrared (FLIR) camera

imaging infrared system (I2R sys)

infrared (IR)

infrared / negative ultraviolet (IR/NUV) seeking

infrared acquisition system

infrared beam

infrared CO2 laser

infrared devices

infrared homing system

infrared imaging sensor

infrared night vision observation device

infrared receiver

infrared sensor

infrared target-sensor

forward looking infrared (FLIR) receiver

infrared sight-line control (ISC)

IRR / Infrared Resistant

advanced forward-looking infrared

advanced large-area infrared transducer

infrared focal plane array

long wavelength infrared focal plane array

infrared countermeasures

infrared device

infrared light supply

infrared search and tracking (IRST)

infrared viewing