Application and Development of Passive Detection Systems for Early Warning

The current status and development trend of passive early warning systems at abroad are presented.The passive early warning systems include infrared early warning systems,ultraviolet early warning systems and opto-electronic early warning systems.The key technologies and performance of various early warning systems are summarized.The development trend of early warning systems is analyzed.Particularly,the multispectral early warning systems containing multiple passive detection technologies are forecasted.