Threat assessment of air defense in important maritime areas with missing feature data

Aiming at the problem of missing part of the characteristic data of the incoming target during the threat assessment of air defense operations in important area at sea, a new threat evaluation method considering the cosine distance between the characteristic vector of the incoming target and the standard target vector is proposed. First, determine the threat assessment index system and attribute weights of the attacking target according to the characteristics of the air defense mission on the key area. Secondly, according to the combat and exercise experience, experts are invited to give a standard sample of high threat. Finally, the vector cosine-based value threat assessment method to calculate the threat value of each target. The simulation results show that the method proposed in this paper can better solve the threat assessment problem when the characteristic data of the attacking target is incomplete, and it has certain reference value for actual combat applications.