THE METHODS FOR EVALUATING THE EFFECTIVENESS OF OPTOELECTRONIC SUPPRESSION IN FACE OF ANTI-AIRCRAFT GUIDED MISSILES

Abstract

The article proposes methodological approaches to assessing the degree of security of an aircraft in the process of overcoming the air defense zone controlled by the calculation of a portable anti-aircraft missile system. For a quantitative assessment of the process of suppressing infrared homing heads of anti-aircraft guided missiles by aviation means of optical-electronic countermeasures, the authors proposed to use one of the indicators of combat effectiveness, taking into account their mutual influence. The most informative indicator of the effectiveness of the use of airborne optical-electronic countermeasures is the change in the area of the zone of possible attacks. The zone of possible attacks is the locus of points on the earth's surface when launched from which an anti-aircraft missile hits a target with a given probability, provided that the target does not maneuver and does not provide any countermeasures. The dimensions and configuration of the zone of possible attacks are determined by the tactical and technical characteristics of the anti-aircraft missile, flight characteristics, the survivability of the target and the availability of optical-electronic countermeasures in it, as well as the conditions of firing. The size of the zone of possible attacks is characterized by the position of the far and near boundaries and is depicted in the polar coordinate system at the beginning of which the projection of the position of the aircraft on the earth's surface is placed. capabilities of the missile's infrared homing head for target detection and tracking. The boundaries of the near zone are determined by the maneuverable characteristics of the missile and the time it reaches the homing area. The means of optoelectronic countermeasures are developing in three independent directions: development of means for reducing the intrinsic infrared radiation of the aircraft and artificially reducing the transparency of the atmosphere; development of false heat-emitting targets based on pyrotechnic compositions and devices for their use; development of optoelectronic suppression stations creating a stream of powerful simulated radiation. Each of the above countermeasures leads to a decrease in the instantaneous range of the infrared homing head of the attacking missile or to an error in the process of measuring the angular coordinates of the target, which in turn leads to an increase in missile miss and a decrease in the probability of the target position. The use of the value of the change in the area of the zone of possible attacks as indicators of the combat effectiveness of the protection of the aircraft makes it possible to objectively assess the influence of individual factors on the missile guidance process and determine the ways to increase the effectiveness of protection. The missile launch, equally likely, can be performed from any point in the zone of possible attacks. Under the influence of optical-electronic countermeasures, the area of the zone of possible attacks decreases and the probability of hitting the target decreases in proportion to it. The proposed method for assessing the effectiveness of the protection of a lethal vehicle from anti-aircraft missiles with infrared homing heads makes it possible to do this not only qualitatively, but also quantitatively.