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In modern warfare, guided weapons , an important goal of the ground precision strike has become the primary means of air raids . Threat warning against incoming weapons , to protect the important goals of the empty safe premise and foundation . However, in the face of a complex battlefield environment , the detection of a single band is difficult to adapt to the needs of the war . Study of state-of-the-art alarm technology has become an urgent requirement of high-tech war . Important goal for terrestrial threat alert needs of low-altitude , raised of a multispectral alarm program on the basis of foreign advanced warning technology research , analysis , of multispectral alarm technology and its important target air defense . Thesis analyzed for air defense alert ultraviolet solar blind and infrared atmospheric transmission characteristics , aircraft, missiles and other targets and sky background radiation characteristics identified for multi-spectral alarm bands for multispectral alarm a theoretical foundation . And then based on the combat mission of the alarm system , build a system model , analysis of the role of distance , field of view , the probability of detection , false alarm rate of tactical and technical indicators , specific requirements . On this basis , the depth of the optical system and a detector member for different radiation bands selected by analyzing the corresponding system structure , device models . Of multispectral alarm signal processing , data fusion technology to explore the analysis of the dual-band passive ranging . Finally, elaborated on the important goal of protection methods , as well as multi- spectral alarm system in important target air defense operational deployment by two instances of the system of air defense positions and bridges, air defense alarm , multi- of spectral alarm system in important target air defense the application to do further analysis .
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